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Building For The Future Since 1952

Glossary of Terms

 

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A

Aerosol Expanding Form Insulation

A liquid foam insulation contained in an aerosol can which when applied dries solid. This type of insulation is generally not recommended by Marvin for insulating between the rough opening and jambs because of

its inherent characteristic to continue to expand after it has been applied. There maybe some exceptions when required by building codes.

Air Barrier

A durable lightweight specially designed sheathing film (or membrane) placed over the exterior sheathing and

around doors and windows to reduce air infiltration.

Air dried (AD)

Lumber that has been dried in the open air.

Aluminum Surround

The aluminum frame around a screen or energy panel.

Apron

A piece of casing or decorative trim installed against the wall immediately beneath the stool of a window.

Argon Gas

A colorless and odorless gas used to fill the airspace between insulating Low E II glass. The addition of argon

increases the insulating performance of the Low E II glass.

Astragal

A moulding applied to one stile of an Inswing French Door, Outswing French Door, Sliding French Door or French Casemaster window unit which the other door panel or window sash strikes. Usually head and footbolt devices will be found on the astragal side.

Assembly

Single units mulled together.

Authentic Divided Lite (ADL)

Permanent stationary muntins and bars separate the glass in a window or door sash to give the sash two or more authentic lites of glass.

Awning Window Unit

A combination of frame and sash, hinged at the top of the vertical jambs which allows the unit to pivot from the top with the sash opening to the exterior of the building.

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A

Aerosol Expanding Form Insulation

A liquid foam insulation contained in an aerosol can which when applied dries solid. This type of insulation is generally not recommended by Marvin for insulating between the rough opening and jambs because of

its inherent characteristic to continue to expand after it has been applied. There maybe some exceptions when required by building codes.

Air Barrier

A durable lightweight specially designed sheathing film (or membrane) placed over the exterior sheathing and

around doors and windows to reduce air infiltration.

Air dried (AD)

Lumber that has been dried in the open air.

Aluminum Surround

The aluminum frame around a screen or energy panel.

Apron

A piece of casing or decorative trim installed against the wall immediately beneath the stool of a window.

Argon Gas

A colorless and odorless gas used to fill the airspace between insulating Low E II glass. The addition of argon

increases the insulating performance of the Low E II glass.

Astragal

A moulding applied to one stile of an Inswing French Door, Outswing French Door, Sliding French Door or French Casemaster window unit which the other door panel or window sash strikes. Usually head and footbolt devices will be found on the astragal side.

Assembly

Single units mulled together.

Authentic Divided Lite (ADL)

Permanent stationary muntins and bars separate the glass in a window or door sash to give the sash two or more authentic lites of glass.

Awning Window Unit

A combination of frame and sash, hinged at the top of the vertical jambs which allows the unit to pivot from the top with the sash opening to the exterior of the building.

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B

Balances

A block and tackle system used in the vinyl jamb liner of Double Hung or Single Hung units.

Bar

A narrow, rabbeted, horizontal or vertical sash or panel member in an authentic divided lite unit, extending from rail to rail or stile to stile along the total length or width of the glass opening.

Barn Sash

A sash usually installed in a rough built-on-the-job type of frame for farm, utility and temporary structures where economy is a prerequisite. Barn sash are always ADL.

Basement Unit

An awning-like inswinging sash usually consisting of one lite; operates as a hopper or awning.

Bay Window

A series of windows installed in a “bay” which is two flanker units and a center sash; a “bay” may be an arc or a polygon; when a “bay” is or closely approaches an arc, the window is termed a “bow.”

Better (BTR)

A term usually used to indicate that a lumber shipment contains a percentage of pieces that are of a higher grade than the lowest grade stated. Thus, No. 2 & Btr would contain pieces of No. 2 grade and some that are of a higher grade, such as No. 1 and Select Structural.

Board Foot (BD FT)

Unit of lumber measurement one foot long, one foot wide, and one inch thick.

Bow Window

A series of adjoining window units, installed on a radius.

Brick Mould Casing (BMC)

An exterior moulding of window and door frames that abuts the exterior facing material of the structure. The casing serves as the boundary moulding for brick or other siding material and also helps to form a rabbet for screens and/or storm sash or a combination door. Wood BMC is standard on wood products. Clad BMC is available as an option on clad products.

Building Paper

An exterior paper, usually impregnated with asphalt, placed over the exterior sheathing and around doors and windows to reduce air infiltration.

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C

CAD

An acronym for computer aided drafting. Software and hardware used in the window industry primarily to provide elevations and cross sections of door and window components.

Cam Lock

A lever operated lock which is used to prevent intrusion through the sash.

Cantilevered

A construction method which prevents the weight of a roof or upper floor from bearing down on a comer window below.

Cants

Large planks or timbers cut on the head saw for further sawing elsewhere.

Capillary Tubes

A tube inserted into the insulating glass spacer that allows the inside and outside air pressure to equalize in higher elevations.

Casemaster

A Marvin trade name for the casement window. A combination of frame, sash, weatherstrip, concealed hinges and operating device assembled as a complete and properly operating unit. Wood Casemasters have a flat sill and a subsill; screens and/or energy panels are optional. Operating Casemasters have a crank handle for smooth operation.

Casement Window

A generic term used for a window sash that swings open using hinges usually attached to the sill and head jamb of the frame.

Casing (CSG)

Usually run to pattern and is widely used for interior trim.

Caulk

A soft, putty like substance used to seal joints where air or water leakage or movement may occur.

Ceiling (CLG)

A lumber pattern featuring a center and edge V and/or bead.

Cellar Sash

See Barn Sash Units.

Center Beaded (CB)

A patterned lumber shaped to form a narrow half-circle along the center of its length.

Center Match (CM)

Lumber that has been worked with a tongue exactly in the center on one edge of each piece and a groove on the opposite edge to provide a close tongue-and-groove joint by fitting two pieces together.

Center Vee (CV)

Patterned lumber shaped to form an angled groove along the center of its length.

Checks

A separation of the wood normally occurring lengthwise of a piece across the rings of annual growth and usually as a result of seasoning.

Chord

The chord is the length of an imaginary straight line connecting the end points of a curve or arc.

Clad

Clad products refer to wood windows and doors which are covered with an extruded aluminum jacket on the exterior side of the frame and sash.

Clad BMC

An aluminum extrusion designed to simulate brick mould casing for Marvin clad products.

Clad E-Z Tilt Double Hung

An obsolete product which has been replaced by the Clad Ultimate Double Hung.

Clad Flat Casing

An aluminum extrusion designed to simulate flat casing for Marvinclad products.

Clad Ultimate Double Hung

A newly redesigned double hung window offering improved aesthetic, energy and operational properties over the obsolete Clad E-Z Tilt Double Hung. The system allows for tilling and removal of sash.

Clear (CLR)

A term including the higher grades of lumber – sound, relatively free of blemishes.

Close-Grained

Wood with narrow and inconspicuous annual rings; the terms is sometimes used to designate wood having small and closely spaced pores, but in this sense the term “fine textured” is more often used; wood with more than six rings per inch.

Clutch

The plastic and metal or fiber filled nylon assembly on which the sash pivot pins of a Double Hung or Single Hung sash rest. The clutch is attached to the block and tackle system of the balance tubes which allow opening and closing of the sash. The clutches are color coded for easy identification of balance strength.

Coarse-Grained

Wood with wide and conspicuous annual rings; that is, rings in which there is considerable difference between springwood and summerwood; the term is sometimes used to designate wood with large pores, such as oak, ash, chestnut, and walnut, but in this sense the term “coarse textured” is more often used; wood with less than four rings per inch.

Combination Door

A wood framed assembly containing an interchangeable storm panel and screen. The unit is installed on the exterior of the door, and is available for the wood Inswing French Door product line.

Combination Window

A wood or extruded aluminum storm sash with self-storing screen. Bottom glass panels such as those installed on Double Hung units operate by moving the plungers in and sliding the glass panel up to the desired position. Side glass panels such as those installed on Gliders slide to the left or right to the desired position. All inserts are removable from the interior.

Commons

A term describing the ordinary grades of knotty lumber.

Condensation

Condensation is fundamentally humidity made visible. Humidity is water vapor mixed with air. When humidity turns to liquid water, it becomes what we call condensation.

Conifers

The botanical group of trees having needles, or scale-like leaves, and cones; they are usually “evergreen.”

Construction Lumber

Lumber that is suitable for ordinary and light construction

Corner Window

A window where the glass is actually bent to a 90 degree angle for a clear corner view uninterrupted by seams or posts.

Cottage Window

A Double Hung or Single Hung window with the bottom sash taller than the top sash.

Crook

A deviation edgewise from a straight line drawn from end to end of a piece and measured at the point of greatest distance from the straight line: it does not include short kinks.

Cup

A curve in a piece across the grain or width of a piece; it is measured at the point of greatest distance from a straight line drawn from edge to edge of a piece.

Curved Glass

The actual curve of the glass forms a radius for the window providing for an alternative to a conventional bow or bay window. They are available as picture or operating units.

Curved Glass Single Hung

A vertically operating window with stationary top sash and operating bottom sash. Sash are glazing with glass that is curved by a special heating process. Sash and frame members are also curved. Movable sash operates with the use of coil spring block and tackle jamb hardware.

Cut Stock

Clear pieces that have been ripped and cross cut from shop type lumber, such as stiles, rails, muntins, window sash, and many others, intended for further manufacture

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D

Daylight Opening

The width and the height of the visible glass.

Decay

Decay is disintegration of wood due to the action of wood-destroying fungi: the words “dote” and “Rot” mean the same as decay.

Decking (DKG)

Lumber expressed in nominal terms as being 2″ to 4″ thick and 4″ and wider. Decking is usually surfaced to single tongue and groove in 2″ nominal thickness. In 3″ and 4″ nominal thickness it may be double tongue and groove and worked with rounded or V edges, striated, or grooved. Decking is widely used for roofing and flooring.

Depth Of The Jamb

The point where the exterior casing ends to the point where the interior casing begins. On clad units, the point from the backside of the nailing fin to the interior of the frame.

Dimension

Framing lumber, a term generally applied to lumber when the nominal size is 2 inches thick and 2 or more inches wide. The National Grading Rule for Softwood Dimension Lumber defines “dimension” as lumber from 2 through 4 inches thick and 2 inches and wider.

Direct Glaze

Refers to a window with no sash. The glass is glazed directly into the frame and is stationary.

Divided Lites

See Authentic Divided Lites.

Dote

“Dote,” “doze,” and “rot” are synonymous with “decay” and are any form of decay which may be evident as either a discoloration or a softening of the wood.

Double End Trimmed (DET)

Both ends cut reasonably square by a saw.

Double Hung

Double Hung windows have two movable sash which operate vertically. Double Hung sash are held in an open position with the use of coil spring block and tackle balancing devices.

Double Hung Tilt Pac

A specially designed, made-to-order, package which includes everything needed to replace double hung sash and hardware in an existing frame without changing the frame. This product has the same tilt feature as the Marvin Double Hung.

Dressed and Matched (D&M)

Lumber that has been worked with a tongue off center on one edge of each piece and a groove on the opposite edge to provide a close joint by fitting two pieces together.

Drip Cap

A formed aluminum or vinyl piece which is installed at the top of windows and doors that allows water to run off the casing of the unit instead of seeping around the casing and into the wait cavity.

Dry Rot

A term loosely applied to many types of decay but especially to that which, when in an advanced stage, permits the wood to be easily crushed to a dry power: the term is actually a misnomer for any decay, since all fungi require considerable moisture for growth.

Dummy Handle

A non-operating handle assembly.

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E

Eased Edges (EE)

Slightly rounded surfacing on pieces of lumber to remove sharp corners. Lumber 4 inches or less in thickness is frequently shipped with eased edges unless otherwise specified.

Edge-Glued

Pieces of wood glued together in order to make a wider or thicker piece of lumber.

Egress

The way by which a person exits. Most building codes require egress windows in steeping areas.

Emissivity

A measure of a surface’s ability to emit long-waved infrared radiation or room temperature radiant heat energy. Emissivity varies from 0 (no emitted infrared) to 1 (100 percent emitted infrared). The lower the emissivity, the lower the resultant U-Value.

Energy Panel (EP)

A piece of glass, annealed or tempered, and finished on the edges by a surround. EPs are applied to windows or doors and rest on the glazing stop. EPs offer the homeowner added energy efficiency.

End Check

A surface check at the end of a piece of lumber.

End-Match (EM)

To tongue and groove the ends of matched lumber.

End-Split

A lengthwise separation of the wood fibers at the end of a piece of lumber.

Escutcheon

A decorative door handle plate attached to the stile directly behind the handle(s). Generally square or rectangular shaped.

Espagnolette

Tilt-Turn hardware which houses the gear mechanism for the Tilt-Turn, inswinging casement and hopper handles.

Extreme Fiber Stress in Bending (Fb)

The allowable unit stress used in the design of bending members such as beams, trusschords, joists and rafters.

Extrusion

An article or product of vinyl or metal made by the process of extruding. Extrusions include vinyl sill and head jamb tracks, vinyl jamb liners and aluminum cladding used on the exterior of clad units.

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F

Face

The wide surface of a piece of lumber; the wide surface showing the better quality or appearance from which a piece is graded.

Factory Lumber

Lumber intended to be cut up for use in further manufacture: it is graded on the basis of the percentage of the area which will produce a limited number of cuttings of a specified, or a given minimum, size and quality.

Fall-Down

Lumber not up to a particular grade.

Fiberglass Insulation

Commonly used blanket or batting type of insulation in the construction industry. This is the preferred type of insulation to be used between the window or door frame and the rough opening.

Field Measurement Guide

A form that is filled out prior to ordering the Clad Magnum Double Hung Replacement System with Panning to ensure the correct sized unit is assembled at the factory.

Finger Joint

A series of fingers machined into the ends of two pieces of lumber to be joined together. They are then held firmly in position by adhesive. Finger jointed wood is very strong and has a lesser chance of warping than does a clear piece of wood the same length.

Finish (window or door)

Term used to describe the exterior wood or clad finish applied to a window or door product (i.e. bare wood, primed or clad).

Finish (lumber)

A term indicating the higher grades of lumber, sound, relatively free of blemishes.

Flanker

A former term used to describe a side or lateral part. Also previously used to describe a 3-wide picture unit or bay. See two-wide entry.

Flat Casing

Flat, surfaced on four sides, pieces of pine of various widths and thicknesses for trimming door and window openings. The casing serves as the boundary moulding for siding material and also helps to form a rabbet for screens and/or storm sash or combination doors. Also available as a clad version.

Flat Grain (F.G.) Slash Grain (S.G.)

Lumber sawn approximately parallel to the annual growth rings so that all or some of the rings form an angle of less than 45 degrees with the surface of the piece.

Fluroropolymer

A resin enhanced with ceramic pigmentation used as a coating on Marvin aluminum clad products. See Kynar

Foam Backer Rod

A compressible foam used with the mull reinforcement components to act as a thermal break and an insulator. Also used in applications to serve as a bridging material to form a proper seal joint.

Footbolt

A locking rod device installed vertically in the stile or astragal of a door or screen which when activated secures the panel or screen in a stationary position.

Frame

The stationary portion of a window or door that encloses either the glass (direct glaze) or the sash or panel (operating or stationary) and consists of the following parts

Head Jamb – The top frame member.

Sill – The bottom frame member.

Sub-sill – The supplemental member used under most woodawning and casement units as an additional sill with the primary purpose being to hold multiple units together at the sill.

Side Jamb – Side or vertical frame members.

Jamb Extension – The addition onto the standard jamb to adapt a window unitto deeper wall thicknesses, in most cases will be factory applied unless specified otherwise.

Brick Mould or Flat Casing – The exterior trim member applied to the side jambs and head jamb on wood or clad units. Often used to secure the window to the wall opening.

Blind Stop – The frame member on a double hung window located between the jambs and the casing. The blind stop forms a rabbet that supports either a storm sash or screen.

Frame Expander

A flat aluminum extrusion used in conjunction with various other extrusion accessories to adapt a standard size clad unitto a special size opening.

Framing Lumber

A term generally applied to lumber when the nominal size is 2 through 4 inches thick and 2 inches and wider; lumber used to construct a building or structure.

Free of Heart Center (FOHC)

Lumber sawn to exclude the heart center or pith of the log.

French Casemaster

A Casemaster styled unit with two hinged sash in one frameproviding a sense of openness unrestricted by a vertical mullion orstiles when both sash are open.

French Door

Marvin French Doors are available in either inswinging or outswinging rectangular or arch top style choices. They can be glazed 1 -lite, ADLor SDL. Available stationary or operating in various hinging configurations.

Friction Limiter

A device used on a Magnum Titt-Turn to provide friction to the sash when in the swing position.

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G

Glass Size

The measurement of the actual glass, not the visible glass.

Glazing

Installing glass into windows and doors.

Single Glass – Glazing with a single piece of glass.

S – Single strength – 3/32″ thick glass, 2.5mm.

DS – Double strength – 1/8″ thick glass, 3.0mm.

3/16″ – 3/16″ thick glass, 5.0mm. f

Insulating Glass – two panes of glass separated by a spacer and hermetically sealed together with dead air space between the panes.

1/2″ Insulating – 2 pieces single pane glass with 1/4″ spacer.

3/4″ Insulating – 2 pieces single pane glass with 1/2″ spacer.

1 ” Insulating – 2 pieces 3/16″ single pane glass with 5/8″ spacer.

High R Tripane – 3 pieces single pane glass with two spacers

Glazing Bead Or Glazing Stops

Strips of profiled wood or vinyl used to hold the glass in position in the sash. Wood glazing bead is attached to the rails and stiles of the sash or panel using staples, small nails or vinyl barbs. A vinyl bead is held in place by extruded barbs positioned in the kerf. Aluminum caps may be used over the vinyl bead in some cases.

Glazing Tape

A two sided adhesive tape placed between the glass rabbet and the glass and/or the glazing bead and glass of some unit types.

Glider

Horizontal operating units which have one sash fixed while the other glides open and shut horizontally.

Grademarked (lumber)

Marked (usually with crayon) to indicate the grade.

Gradestamped

Grade indicated with official stamp impression.

Green wood

Unseasoned wood.

Grilles

Removable wood dividers made to simulate authentic divided lites. Grilles are often rectangular or diamond shaped and are easily removed for cleaning purposes. Grilles can be purchased for nearly all Marvin products.

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H

Handing

A term used to describe the right or left hand operation of a window or door.

Hardwoods

The botanical group of trees that are broad-leaved: the term has no reference to the actual hardness of the wood: Angiosperms is the botanical name for hardwoods.

Headbolt

A locking rod device installed vertically in the stile or astragal of a door or screen which when activated secures the door in a stationary position.

Heart, Heartwood

The wood, extending from the pith to the sapwood, the cells of which no longer participate in the life process of the tree: heartwood may be infiltrated with gums, resins, and other materials which usually make it darker and more decay-resistant then sapwood.

Historical Or Historic

A term used to define a window or door product meeting the requirements of historical renovation standards

Hit and Miss

In surfaced lumber, hit and miss is a series of skips by planer knives and surfaced areas between skips.

Hit or Miss

In surfaced lumber, hit or miss means completely surfaced or partly surfaced or entirely rough.

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I

Industrial (IND)

A term for lumber destined for remanufacture such as industrial clears, moulding stock and shop.

Insulating Glass (IG)

(see Glazing)

Installation Brackets

A factory installed or supplied installation bracket used with windows or doors to attach the unit in the rough opening in lieu of nailing through the casing, thus eliminating unsightly nail holes. Available as an option for all Marvin wood window or door products.

Insulation

A commercial product, usually of fiber glass, placed between the rough opening and a door or window frame to prevent drafts and provide an insulation value.

Inswing Casement

A non-tilting version of the Magnum Tilt-Turn.

Interior Casing

The trim used on the interior perimeter of the window or door. Generally supplied by others except in the case of round top trim which is factory supplied.

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J

Jamb Extension

A jamb-like member, usually surfaced on four sides, which increases or extends the depth of the exterior or interior window or doorframe; jamb extensions imply a larger depth than “wood jamb liners.”

Jamb Hardware

Double Hung vinyl jamb liners with balances included.

Jamb Liner (Vinyl)

The vinyl vertical tracks in which double hung and Magnum Double Hung sash slide up and down. The vinyl jamb liner houses the balance tube assemblies.

Jamb Liner (Wood)

Thin strips of wood attached to the head jamb, side jambs and sill to accommodate various wall thicknesses. Common jamb depths are: 4 9/16″, 4 13/16″, 5 1/16″ and 5 3/16″.

Joist

Pieces (nominal dimensions 2 to 4 inches in thickness by 5 inches and wider) of rectangular cross section graded with respect to strength in bending when loaded on the narrow face: used as supporting members under a floor or over a ceiling.

Joists and Planks (J&P)

The national grading rules contain four grades of structural joists andplanks; select structural, No. 1, No. 2 and No. 3. Nominal sizes are 2 to 4 inches thick by 5 inches and wider. The abbreviation (J&P) is generally used to indicate a specific section in the grading rules under which the lumber was graded.

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K

Keyed Cylinder Lock

A lock providing an exterior entry and locking convenience on a door.

Kiln Dried (KD)

Lumber, which has been dried under conditions of, controlled temperatures and humidities in a dry kiln.

Knee Brace

Generally a decorative type of support used in combination with a support platform for a bow or bay to provide structural stability to prevent sagging of the unit.

Knot

That portion of a branch or limb that occurs in a piece of lumber.

Krypton Gas

Inert gas known for its ability to provide insulating properties in a small air space.

Kynar

A unique fluroropolyner resin enhanced with ceramic pigmentation used as an exterior coating on Marvin Clad products.

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L

Laminated Glass

Glass composed of two sheets of glass fused together with a sheet of transparent plastic between the sheets. When broken, laminated glass will generally not fall from the opening.

Laminated Wood

A piece of wood built up of plies or laminations that have been joined either with glue or with mechanical fastenings: the term is most frequently applied where the plies are too thick to be classified as veneer and when the grain of all plies is parallel.

Laminating

A method of gluing strips of thin clear wood to the lengthwise surfaces of finger jointed material to provide the appearance of clear stock.

Lever Lock

A lever handle and lever arm operator available as an option onawning units.

Light Framing (LF)

The national grading rules contains three grades of light framing: construction, standard and utility. Nominal sizes are 2 to 4 inches thick and 2 to 4 inches wide. The abbreviation (LF) is used to indicate a specific section in the grading rules under which the lumber is graded.

Lineal Footage

Having length only, RO Base (in inches) x 2+RO Height (ininches) x 2 divided by 12 equals the RO perimeter in lineal feet of a unit.

Lineal Length

Term used to describe length of stock wood or vinyl available for purchase other than specified lengths. Generally wood lineal lengths come in 120″ while vinyl lineal lengths come in 12′ 6″.

Lockset

A complete door lock system comprised of the lock mechanism together with knobs, keys, plates, strikes and other accessories.

Low E Glass

Low E stands for low emissivity. Low E glass is coated with a thin microscopic, virtually invisible, metal or metallic oxide layer. The primary function is to reduce the U-value by suppressing radiative heat flow. See Options Section for a more detailed explanation of Low E glass.

Low E II Glass

A high performance Low E glass, providing the best winter U-value and warmest center glass. Also during the summer, customers will have one of the coolest glass temperature of all Low E products. See Options Section for a more detailed explanation of Low E II glass.

Lumber Sizing

The terms 4/4, 5/4, 6/4 and 8/4 refer to the thickness of the wood from which sash and frame parts are milled. The maximum finished dimension of these are as follows: 4/4 = 11/16″, 5/4 = 1 3/32″, 6/4 = 1 5/16″ and 8/4 = 1 23/32″.

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M

Machine Stress-Rated (MSR lumber)

Lumber that has been evaluated by mechanical stress rating equipment; each piece is nondestructively tested and marked to indicate the modulus of elasticity. MSR lumber is also required to meet certain visual requirements.

Magnum

A Marvin trade name for heavily constructed commercial window products which are designed for applications where a heavy duty product is necessary.

Magnum Double Hung

A heavy duty double hung product made with larger than standard parts. The larger sash parts will accommodate larger glass sizes.

Magnum Hopper

A heavy duty commercial window designed to tilt into the room tor ventilation purposes.

Magnum Tilt-Turn

A heavy duty commercial window. The Magnum Tilt-Turn has hardware which allows the sash to either be tilted into the room tor ventilation or swing into the room tor egress or cleaning.

Masonry Opening

A brick, stone or block opening into which a window or door unit is installed including the outside casing.

Matched

Lumber that has been worked with a tongue on one edge of each piece and a groove on the opposite edge to provide a close tongue-and-groove joint by fitting two pieces together; when end-matched, the tongue and groove are worked in the ends also.

Modulus of Elasticity (MOE)

The relationship between the amount a piece deflects and the load causing the deflection determines its stiffness. Factors affecting the MOE are grade, size, span and species.

Modulus of Rupture (MOR)

A measurement of the load required to break a particular size and length of lumber.

Moisture Content (MC)

The moisture content of wood is the weight of the water in wood expressed as a percentage of the weight of the wood from which all water has been removed (oven dry). Moisture is removed from lumber either by air drying or by use of special drying kilns.

Mortise And Tenoning

The system by which Marvin assembles authentic divided life units, a projecting tenon on either the muntins or bars fit snugly into a mortise in either a bar. stile or rail.

Mulling

The act of attaching two or more window or door units together. The joint is then finished with a mullion center cap or mull trim.

Mullion

The resulting vertical or horizontal member of a window or door assembly created by joining two or more units together.

Space Mull- Two or more units mulled together with aspace left between the units. The jamb extension surrounds the entire unit. Often used to make standard size units fill a special size opening.

Stud Pocket-Two or more units mulled together with a space between the units. The jamb extension surrounds each unit separately, providing space tor a support member between the units.

Mullion Cover

An extruded aluminum cover for space mull usage on the CladMagnum Double Hung Replacement System with Panning. It covers a range from 3″ minimum to 10″ maximum.

Mullion Expander

An aluminum extrusion designed specifically for the Clad Magnum Double Hung Replacement System with Panning to allow the existingpanning to be expanded to a wider width to accommodate a largerrough opening.

Mullion Reinforcement

The 3/8″ mullion reinforcement is designed to be used on wood orclad multiple Casemaster, Awning and direct glaze assemblies to improve structural performance in regard to wind toad.

Multi-Point Locking System

A line of standard or optional multiple point locking mechanisms installed on the operative panel(s)/sash of various Marvin products to enhance security and performance.

Muntin Or “Munt”

A short “bar,” horizontal or vertical, extending from a bar to a stile or rail or another bar.

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N

Nailing Fin

A factory installed vinyl strip that is inserted into a kerf in the frameof clad units. Nailing fin installation is the standard method used for installing clad units.

Non-Keyed Cylinder

A handle without a keyed cylinder. The door cannot be locked or unlocked from the exterior.

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O

Obscure Glass

Glass formed by running molten glass through special rollers. These rollers have a pattern on them causing the glass to become patterned and thus “obscure.”

OM

Outside Measurement.

OMH

Outside measurement height.

OMW

Outside measurement width.

One-Wide

The current term used to describe one frame with single or multiple sash or panels.

Operator

An operating sash, panel or unit.

Outside Measurement Of The Frame (OSM)

The width and the height of the unit not including the casing.

Outswing French Door

A french doorwith panels that swing to the outside. One and two panel units are available as either stationary or operating. Operating two panel units include one active and one inactive panel.

OX And XO

The letters OX or XO identify the operation of window or door units as viewed from the exterior. The letter 0 stands for stationary while the letter X stands for operating. The letters XX indicate both panels can operate. The active panel can be left or right.

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P

Panel

Either the stationary or operating wood frame with glass used on Marvin door products.

Panning

A term used to describe the aluminum extrusion components (i.e. jambs, sill and head jamb) used in the Clad Magnum Double HungReplacement System with Panning to cover the existing windowframe.

Part Stop

A strip of wood with weatherstripping attached which prevents air and water infiltration. Part stops are commonly found at the head jamb of a double hung unit.

Partly Air Dried (PAD)

Seasoned to some extent by exposure to the atmosphere, but still considered green or unseasoned.

Pascal

A metric unit of pressure which equals one newton per square meter.

Peck

Pockets or areas of disintegrated wood caused by advanced stages of localized decay in the living tree: it is usually associated with cypress and incense cedar: there is no further development of peck once the tree is felled.

Pistol Grip Handle

The handle hardware used on Tilt-Turn and Hopper windows. During operation it is grasped in the same manner as the handle of pistol.

Pitch

A term used to describe the angle of a roof. For example: A 4-12 pitch indicates that the roof rises 4″ vertically for each 12″ horizontally.

Pith

The small soft core occurring in the structural center of a log.

Plank

A piece of lumber, from 2 but not including 5 inches thick, generally used with wide face horizontal: (differs from joist only that latter is used on edge).

Plinth Block

A decorative wood block placed between the vertical casing and the top casing of a unit to provide an elegant interior casing profile.

Plumb Bob

A carpenter’s device used to ensure vertical alignment.

Plywood

A piece of wood made of three or more layers of veneer joined with glue and usually laid with the grain of adjoining plies at right angles. Almost always an odd number of plies are used to secure balanced construction.

Pole Crank

An aluminum extension pole used to open or close awnings which would be otherwise unaccessible because of their height.

Polygon

A high level term used to describe triangles, trapezoids, pentagons, hexagons and octagons.

Posts and Timbers

Large pieces (nominal dimensions, 5″ by 5″ and larger, width not more than 2″ greater than thickness) of square or approximately square cross section graded primarily for use as posts or columns.

Powerdrive

An electrically operated device which will open Casemaster or Awning units by a switch. This is in lieu of a roto gear crank or pole crank.

Precision End Trimmed (PET)

Lumber is trimmed square and smooth on both ends to uniform length.

Prime

The first coat of paint in an application that consists of two or more coats; also refers to the paint used for such an initial coat – primer.

Protractor

A device used to determine the angle of an existing sill.

Psychrometer

A device used to accurately measure the relative humidity in a dwelling.

Pultrusion

Lineal profiles manufactured by combining plastic resin and continuous glass fiber reinforcement. These thermally insulating and structural components are ideally suited for applications where strength, thermal stability and weather resistance are required. PURLIN – A piece of wood which is used to replace a portion of compressible sheathing. It provides a strong support section for fastening a platform to an exterior wall for bay and bow installations.

Pyrolitic Low E Glass (Hardcoat)

Pyrolitic Low – E is designed to be used either in non-insulating applications such as energy panels that have exposed surfaces or surfaces or for insulating glass applications. The pyrolitic coating is typically applied to the second surface, but can be applied to the third surface to provide increased solar heat gain. For a more detailed explanation see options section.

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Q

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R

R Value

A measure of a material’s resistance to heat flow. Higher numbers indicate greater insulating capabilities.

Rabbet

A groove along or near the edge of a piece of wood.

Radius

The length of an imaginary line from the center point of a circle to the arc or circumference of a circle.

Rails

The horizontal members of the framework of a sash or panel assembly

Random (RDM)

May refer to an assortment of either lengths or widths normally produced by a lumber manufacturer.

Random Length (R/L, RL)

Lumber containing an assortment of lengths. A random length shipment should contain a fair assortment of the lengths being produced by the manufacturer.

Random Width (R/W, RW)

An assortment of widths normally accumulated when manufacturing certain grades and sizes of lumber.

Random Width and Random Length (RW/L)

Indicating an assortment of lengths and widths normally accumulated in the manufacturing process.

Relief Kerf

Kerfs machined into the frame parts of a window or door unit to inhibit warping.

Resawn (R/S)

To reduce the thickness of boards, dimension, planks or other material by cutting into two or more thinner pieces on a resaw; or a circular or band mill where this is done.

Retro

Retro sizing refers to units which are sized for replacement purposes.

Rip

To reduce the wide of boards, dimension or other material by ripping into two or more narrower pieces.

Rolled Aluminum

A term used to describe aluminum profiles which are fabricated by the use of a roller or series of rollers to produce a desired profile.

Rose

A circular cover plate attached to the stile directly behind a knob or door handle. May be plain or have a decorative design embossed into the cover.

Roto-Gear

A term used to describe the steel drive worm, gears and crank device used for opening Awnings and Casemasters

Rough (RGH)

Uneven texture, not smooth as passed through a saw.

Rough Lumber

Lumber as it comes from the saw, which has not been further surfaced or machined: lumber which is not dressed.

Rough Opening

The opening in the wall where a window or door unit is to be installed. Openings are larger than the size of the unit to allow room for insulation and to shim the unit square.

Round Top

Generally a semicircle window which is mulled to the top of another window or door, thus forming the Round Top appearance. There are full Round Tops, separated Round Tops. ellipticals, transoms, inverted corners, ovals and Gothic heads. etc. Round Tops can be used separately or combined with other units.

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S

Safe-T-Plus Patio Door

An obsolete term that described a specific line of Marvin wood and clad patio doors. The door featured an exclusive Safe-T-Lock dead bolt locking system.

Sapwood

The layers of wood next to the bark, usually lighter in color than the heartwood, one-half inch to 3 or more inches wide that are actively involved in the life processes of the tree: under most conditions, sapwood is more susceptible to decay than heartwood; as a rule, it is more permeable to liquids than heartwood: sapwood is not essentially weaker or stronger than heartwood of the same species.

Sash

The operating and/or stationary portion of the window unit that surrounds the glass and is separate from the frame. The sash consists of the following parts:

Stiles – Vertical sash members.

Rails – Horizontal sash members.

Check Rails – Horizontal sash members that meet, as in double hung units. These could also be vertical check stiles as in the glider or patio door.

Bars – Divisional members extending from rail to rail or from stile to stile in an authentic divided lite unit.

Muntins – Divisional members extending from a bar to a rail or stile or another bar.

Sash Limiter

An optional metal device which attaches to a Casemaster sill and bottom rail which limits the sash to a specified opening -5,10,15 and 20 degrees.

Sash Lock

A locking device which holds a window shut, such as a lock at the check rails of a double hung unit. Larger units utilize two locks.

Sash Opening

The opening between wood frame members for both height and width (disregarding any jamb hardware tracks). This measurement is used predominantly when measuring an opening for the Double Hung Tilt Pac.

Sash Pivot Pin

A zinc pivot pin attached to the top and bottom sash stiles of Double Hung units (bottom sash on Single Hung units). Sash pivots rest on the clutch system of the balances which allow opening and closing of the sash.

Sash Retainer Plate

A nylon plate used on Double Hung and Magnum Double Hung sash to prevent the bottom sash from tilling in heavy wind load applications

Sash Width

Horizontal measurement across the face of a sash.

Saw Kerf

A single saw blade cut into a member, generally to receive a weatherstrip.

Screen OM (outside measurement)

The width and the height of a screen including wood or metal surrounds.

Screens (Full And Half)

A close-mesh woven screen material of metal or fiberglass attached to an aluminum or wood surround. Screens inhibit entry of insects, yet permit light, air and vision. Most Marvin window and door products utilize full screens. Half-screens are available for Single Hung units.

Sealant

A compound used to fill and seal a joint where air and water leakage or movement is expected.

Seasoned Lumber

Lumber which has been dried: (seasoning can take place by open-air drying within the limits of moisture contents attainable by this method, or seasoning can take place by controlled air drying, (i.e., by kiln drying).

Second Growth

Timber that has grown after the removal by any means of all or a large portion of the previous stand, usually young trees: wood assumed to have grown in a forest after removal of any large part, or all, of a previous stand.

Select (SEL)

A term including the higher grades of lumber, sound, relatively free of blemishes.

Sequential Locking System

An exclusive Marvin design used on Casemasters for locking the sash to the frame. The action is sequential with the lower lock activating first, moving the sash to the weatherstrip: the top lock then engages to snug the sash to the frame.

Shake

A lengthwise separation of the wood, which occurs usually between or through the rings of annual growth.

Sheathing

Lumber or other material used to cover the interior or exterior frame of a building. Siding or finish material is then applied over the sheathing.

Shim

A wedge or strip of wood used to level and square a window or door in the rough opening.

Shiplap (S/L, SL)

A lumber item with lap joints, sometimes applied to this pattern.

Shop Lumber

Lumber intended to be cut up for use in further manufacture; it is graded on the basis of the percentage of the area which will produce a limited number of clear cuttings of a specified, or a minimum, size and quality.

Sidelite

A stationary glass panel mulled to or installed next to a door.

Sill

The horizontal member forming the bottom of a window or exterior door frame; the lowest member of the frame of a structure, resting on the foundation and supporting the frame.

Sill-Horn

The extension of the “lip” of a window sill to the outside edge of the casing.

Single Hung

A window very similar to a double hung window, except that the top sash is stationary or non-operable.

Sliding French Door

A state of the art sliding patio door. This classic French beauty has a number of new features such as a virtually indestructible sill system, a top mounted screen, exclusive brass handles and a special locking system utilizing strike bolts and slide bars differentiating it from typical sliding doors.

Slot And Tenoning

The machining of profiles into the ends of stiles and rails in order to produce strong sash frame corners.

Skip

An area on a piece that failed to surface.

Softwoods

The botanical group of trees that have needle or scale-like leaves and are evergreen for the most part, cypress, larch and tamarack being exceptions: the term has no reference to the actual hardness of the wood: “softwoods” are often referred to as conifers, and botanically they are called gymnosperms.

Spacer

Used to separate the two pieces of glass in insulating glass applications.

Split

A lengthwise separation of the wood due to the tearing apart of the wood cells.

Spring Loaded Lock

Double hung check rail lock that snaps to a fully open or closed position to prevent damage to the top sash.

Springwood

The portion of an annual growth ring which forms during the early part of any season’s growth; usually less dense, weaker mechanically, and lighter colored than summerwood.

Square (SQ)

Most often used in combinations such as, square edge or square edge trim meaning at a right angle to the face or length of a piece. Also used as a unit of measure for some building material to indicate the quantity sufficient to cover 100 square feet of area.

Square Edge

Means free from wane and without eased edges.

Square Foot

For measuring the area of a unit. RO width (in inches) x RO height (in inches) divided by 144 equals the area in square feet of a unit.

Squares

Rough lumber destined to be further worked.

Starburst

A divided lite grille, ADL or SDL pattern consisting of multiple spokes radiating from a central point.

Stationary

A non-operating sash. panel or unit.

Stationary Sash Bracket

A 90 degree L bracket used to secure stationary Casemaster and awning sash to the frame. The sash can be removed for replacement by removing the wood stops and bracket screws.

Stiles

The upright or vertical perimeter pieces of a sash, panel or screen.

Stool

A horizontal interior trim member that laps the window sill above the apron and extends beyond the interior casing.

Storm Sash

A wood framed assembly containing non-removable glass. The storm sash is removed during the summer and replaced with a wood framed screen.

Stress Grades

Lumber grades having assigned working stress and modulus of elasticity values in accordance with accepted basic principles of strength grading.

Structural Masonry Brackets

An installation bracket used with multiple high/wide window units or large doors for added structural support. The brackets are also used to attach the unit in the rough opening in lieu of nailing through the casing, thus eliminating unsightly nail holes.

Stud

Used for framing interior or exterior wall sections of a building, usually a 2″ x 4″ – 8′ or precision end trimmed from 8′ stock. However, other light framing sizes may also be used for studding.

Summerwood

The portion of the annual growth ring that is found during the latter part of the yearly growth period: it is usually more dense and stronger mechanically than springwood.

Sunburst

A divided lite grille, ADL or SDL pattern consisting of a hub with multiple spokes.

Support Platform

A platform of generally 2 x 4 construction placed beneath a bow or bay unit to provide structural stability and to prevent sagging of the unit.

Surface Check

Occurs only on one surface of a piece.

Surfaced Dry (S-Dry)

Lumber dried to 19% or less moisture content.

Surfaced Green (S-GRN)

Lumber unseasoned, with moisture content in excess of 19%.

Surfaced Lumber

Lumber which has been planed or sanded on one or more surfaces.

Surround

A protective trim secured to an energy panel by an adhesive or vinyl barb to give the glass panel a safe finished edge. Also the aluminum framework for most standard screens.

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T

Tempered Glass

Float glass panels heated and then cooled rapidly in a controlled environment. This process makes the glass several times stronger than regular glass. It also makes it safer because when broken it yields small pebble-like fragments.

Template

A pattern of a window unit from which dimensions and measurements can be determined. Round Tops require templates for replacement units.

Terrace Door

An obsolete term that describes a specific line of inswing hinged doors. The product has been replaced by the Inswing French Door.

Three-Wide

Current term referring to any product or unit when three frames (i.e. separate jambs) are mulled together as a multiple unit.

Through Check

One extending from one surface through the piece to the opposite surface or to an adjoining surface.

Tight Knot

May be red or black, and is so fixed by growth, shape or position that it retains its place in the piece.

Tilt Pac

A specially designed made-to-order package which includes everything needed to replace double hung sash and hardware in an existing frame without changing the frame. This product has the same tilt feature as the Wood E-Z Tilt Double Hung.

Tongue and Groove (T&G)

Lumber that has been worked with a tongue on one edge of each piece and a groove on the opposite edge to provide a close tongue and groove joint by fitting two pieces together.

Transom

A window above a window or door. Transoms can be either stationary or operating.

Trimline Patio Door

A wood or clad replacement size patio door having two or three glass panels: one panel operates. TURN BUTTON – A vinyl or aluminum button and screw. Buttons are used to secure wood combinations, storm sash and wood screens to the exterior casing or energy panels to the sash or door panel.

Twist

A distortion caused by the turning or winding of the edges of a board so that the four corners of any face are no longer in the same plane.

Two-Wide

Current term referring to any product or unit when two frames (i.e. separate jambs) are mulled together as a multiple unit.

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U

U Factor

A measure of total heat flow through a material. Lower numbers indicate greater insulating capabilities.

Ultimate French Door

A high performance wood or clad French door which uses an Ultrex” core to prevent warping. The door which has been certified meets a WDMA DP 40 rating. A standard multi-point locking system provides superior security.

Ultrex

A pultruded composite material made of polyester resin and glass fibers. This superior material is now being used in many Marvin products

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V

Veneer

Wood peeled, sawn or sliced into think sheets of a given thickness and used in the production of plywood.

Vertical Grain (V.G.)

Another term for edge grain: annual rings at an angle of 45o or more to the wide face of a piece of lumber.

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W

Wane

Bark or lack of wood from any cause on the edge or corner of a piece.

Warp

Any variation from a true or plane surface; it includes crook, bow,cup, twist, or any combination thereof.

Weatherstripping

A strip of resilient material positioned between sash and framemembers creating a seal to reduce air and water infiltration.

White Speck

Small white pits or spots in wood caused by the fungus “fomes pini.” It develops in the living tree and does not develop further in wood in service.

Wire Glass

Glass with wire embedded into the glass when the glass is still in a molten state. This prevents the glass from falling out of the sash if it should break.

Wood E-Z Tilt Double Hung

A phrase used to describe the current Marvin Wood Double Hung. Additionally, the term E-Z Tilt Pac is used to describe both the current Wood and Clad Tilt Pac replacement kits.

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X

XO

See OX

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Y

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Z

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