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Siding Glossary of Terms

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Backerboard - A flat material used on the face of the house, between the studs and the siding, to provide a nailable surface for the siding.↑ Back to top

Buttlock - The bottom edge of a siding or soffit panel, or accessory piece, opposite the nailing slots, which locks onto the preceding panel. ↑ Back to top

Channel - The area of the accessory trim or corner post where siding or soffit panels are inserted. Channels also refer to the trim itself, and are named for the letters of the alphabet they resemble (e.g., J-channel, F-channel, etc.).↑ Back to top

Course - A row of panels, one panel wide, running the length of the house from one side to the other or, in the case of vertical siding, from top to bottom.↑ Back to top

Drip Cap/Head Flashing - An accessory installed with vertical siding to ensure that water drips away from panels and does not infiltrate them; it is also used as a vertical base.↑ Back to top

Double Channel Lineal - A siding accessory that joins two soffit panels.↑ Back to top

Face - Refers to the side of a siding or soffit panel that is showing once the panel has been installed.↑ Back to top

Face-nailing - The action of fastening directly onto the "face" side of a panel (instead of using the nail hem slot). This practice is generally not used in siding installation.↑ Back to top

Fascia Board - A board attached to the ends of the rafters between the roofing material and the soffit overhang. Fascia cap is the covering around that board.↑ Back to top

Flashing - A thin, flat material, usually aluminum, positioned under or behind J-channels, corner posts, windows, etc., to keep draining water from penetrating the home.↑ Back to top

Furring/Furring Strip - A wooden or steel framing material, usually 1" x 3", used to provide an even nailing base. To "fur" a surface means to apply these strips.↑ Back to top

Lap - To overlap the ends of two siding panels or accessory pieces to allow for expansion and contraction of the vinyl product.↑ Back to top

Lug/Crimp - The raised "ears" or tabs on a siding panel, created by a snaplock punch, which can be used to lock a siding panel into place when the nailing hem has been removed.↑ Back to top

Miter - To make a diagonal cut, beveled to a specific angle (usually 45°). Sometimes miter cuts are made into an overlapping siding or soffit panel surface, to provide a neater appearance.↑ Back to top

Nailing Hem (or Flange) - The section of siding or accessories where the nailing slots are located.↑ Back to top

Plumb - A position or measurement that is truly and exactly vertical, 90° from a level surface.↑ Back to top

Positive Lock - Area below the nailing hem that the buttlock locks into.↑ Back to top

Profile - Describes the design of the panel (Clapboard, Dutch lap, Triple 3, etc.) ↑ Back to top

Scoring - Running a utility knife blade, a sharpened awl, scoring tool, or other sharp implement across a soffit or siding panel face without cutting all the way through the panel. This weakens the vinyl surface in a specific area and allows the panel to be bent and broken off cleanly.↑ Back to top

Soffit - Material used to enclose the horizontal underside of an eave, cornice, or overhang. Some soffit panels may also be used as vertical siding.↑ Back to top

Square - A measurement of siding. One square equals 100 square feet (10 x 10 wall).↑ Back to top

Strapping - A flexible framing material used to even a surface prior to installation.↑ Back to top

Starter Strip - An accessory applied directly to the surface of the building and used to secure the first course of siding to the home.↑ Back to top

Underlayment - Weather-resistant material placed under vinyl siding panels.↑ Back to top

Weep Holes - Openings cut into siding or accessories to allow for water runoff.↑ Back to top

Window Glossary of Terms

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AAMA - American Architectural Manufacturers Association. A national trade association that establishes voluntary standards for the window, door, storefront, curtain wall and skylight industries.↑ Back to top

Air Infiltration - The amount of air leaking in and out of a building through cracks in walls, windows and doors.↑ Back to top

Argon Gas - An inert, nontoxic gas used in insulating glass units to reduce heat transfer.↑ Back to top

ASTM - American Society for Testing and Materials. Organization that develops methods for testing of materials.↑ Back to top

Awning Window - A window that is hinged at the top and swings outward for ventilation.↑ Back to top

Balance Covers - A snap in covering that conceals the EvenForce™ block and tackle balance system within the window frame, helping to keep dirt out of the chamber.↑ Back to top

Bay Window - An angled combination of three windows that project out from the wall of the home. The windows are usually positioned at 30° or 45° angles.↑ Back to top

Block and Tackle Balance System - In the case of Preservation, this is the EvenForce™ block and tack balance system. The block and tackle system utilizes a high-density nylon cord pulley action that is attached to a moveable block that travels up and down within a metal chamber. Tension from a heavy-duty coil spring at the top of the block creates the proper resistance necessary for smooth operation of the window sash.↑ Back to top

Bow Window - An angled combination of windows in 3-, 4- or 5-lite configurations. As the windows are joined to each other, they combine to form an arch shape that projects from the wall of the home.↑ Back to top

Butyl - A rubber material that seals the glass to the spacer, creating an airtight and watertight insulated glass unit.↑ Back to top

Cam-action Lock and Keeper - The mechanisms that pull and secure the sashes together when placed in the locked position.↑ Back to top

Casement Window - A window with a side-hinged sash that opens and closes outward by a crank handle mechanism. Available in continuous mainframe, with multi-lite configurations.↑ Back to top

ClarityOne™ Glass - A chemical treatment that when applied to glass, helps to create a smoother surface that won't attract or hold dirt and dust. Established by PPG Industries.↑ Back to top

Condensation - The deposit of water vapor from the air on any cold surface whose temperature is below the dew point, such as a cold window glass or frame that is exposed to humid indoor air.↑ Back to top

Coved Glazing Beads - A contoured piece of vinyl that holds the glass in place within the sash and adds an elegant finished look.↑ Back to top

Double-Hung Window - A window that has two vertical operating sashes.↑ Back to top

E-Gard® - Brand name for specially coated, operating hardware that helps to resist oxidation and corrosion.↑ Back to top

Egress Code - The minimum opening of a window for people to exit or firefighters to enter a building/dwelling.  Different states or regions have different code requirements.↑ Back to top

ENERGY STAR® - The ENERGY STAR program is a joint venture between the US Environmental Protection Agency (EPA) and the US Department of Energy (DOE) designed to encourage homeowners to purchase energy-efficient products. Using less energy in our homes reduces the amount of CO2 emissions released into the atmosphere from burning fossil fuels such as coal, oil and natural gas. The advanced components and design used in each and every Preservation Window utilizing the EnergyMaxx® insulated glass package exceed all performance criteria required by the ENERGY STAR program.↑ Back to top

EnergyMaxx - The brand name for the insulated glass unit that is present in the Preservation Window. An EnergyMaxx unit will contain either two or three panes of glass, with one or two of those panes being a Low-E surface. It will utilize the SST Warm-Edge Spacer System and contain either argon or krypton gas.↑ Back to top

EvenForce™ - Preservation's brand name for its block and tackle balance system.  A balance system is a device for holding the vertically sliding sashes in any desired position within the window mainframe.↑ Back to top

Fenestration - The placement of window openings in a building wall; one of the important elements in controlling the exterior appearance of a building. Also, a window, door or skylight and its associated interior or exterior elements, such as shades or blinds.↑ Back to top

Fixed Lite - A pane of glass installed directly into non-operating framing members; also, the opening or space for a pane of glass in a non-operating frame.↑ Back to top

Fixed Panel - An inoperable panel of a sliding glass door or sliding window.↑ Back to top

Fixed Window - A window with no operating sashes.↑ Back to top

French Patio Door - A two-panel glass door where both panels operate either inward or outward.↑ Back to top

Fusion-welded - The process of joining materials by melting them together with extreme heat (in most cases over 500°F), resulting in the materials combining into a one-piece unit.↑ Back to top

Garden Window - Designed much like a bay or bow window, a garden also extends from the wall to the exterior of the home. It is built in a square or rectangular shape at right angles. The two sidelights often operate for added ventilation.↑ Back to top

Gas Fill - A gas other than air, usually argon or krypton, placed between window or skylight glazing panes to reduce the U-factor by suppressing conduction and convection.↑ Back to top

Glazing - The glass or plastic panes in a window, door or skylight.↑ Back to top

Glazing Bead - A molding or stop around the inside of a window frame to hold the glass in place.↑ Back to top

Grids - Optional horizontal or vertical lineal installed between the glass panes help to create the appearance of a divided window design.↑ Back to top

Hinged Patio Door - A two-panel glass door where one panel is stationary or fixed, while the other operates and swings either inward or outward.↑ Back to top

Hopper Window - A bottom-hinged sash window that opens inward for ventilation.↑ Back to top

Insulating Air Chamber - Various chambers within the sash and masterframe, which help to insulate and strengthen the window.↑ Back to top

IntegraWeld - The fusion-welding process of Preservation Windows↑ Back to top

Jamb - A vertical member at the side of a window frame or the horizontal member at the top of the window frame, as in a header.↑ Back to top

Krypton Gas - An inert, nontoxic gas used in insulating windows to reduce heat transfer.↑ Back to top

Lift - Handle for raising or lowering the sashes in an operable window. Also called sash lift or lift rail.↑ Back to top

Lite - A unit of glass in a window.↑ Back to top

Low-E (Emissivity) Glass - Microscopically thin, virtually invisible, metal or metallic oxide layers deposited on a window or skylight-glazing surface primarily to reduce the U-factor by suppressing radiative heat flow. A typical type of Low-E coating is transparent to the solar spectrum (visible light and short-wave infrared radiation) and reflective of long-wave infrared radiation.↑ Back to top

Masterframe - The combination of the head, sill and jamb sections of a window.↑ Back to top

Maxum33™ - A polyurethane fiberglass meeting rail reinforcement in the sashes of Preservation Windows. Adds extra strength and helps to prevent flexing during heavy winds; also increases insulation performance.↑ Back to top

Meeting Rail - The part of a sliding glass door, a sliding window or a hung window where two sashes meet and create a weather barrier.↑ Back to top

Mylar - A weather-stripping material that is present where the sash frame meets the masterframe.  Adds increased resistance to air infiltration.↑ Back to top

NFRC - The National Fenestration Rating Council provides accurate information to measure and compare energy performance of windows, doors and skylights.↑ Back to top

Obscure Glass - Glass that has been made translucent instead of transparent.↑ Back to top

Origin II™ - The premium vinyl resin used in all Preservation Windows. The material's low thermal conductivity makes it the best choice for window manufacturing. Will not rot, peel, blister, swell or deteriorate from corrosion or pitting.↑ Back to top

Panel - A major component of a sliding glass door, consisting of a light of glass in a frame installed within the main (or outer) frame of the door. A panel may be sliding or fixed.↑ Back to top

Picture Window - A window that does not move or operate.↑ Back to top

ProgressiveEfficiency - A pre-expanded, high-density polyisocyanurate insulation. Present in the sashes and masterframe of Preservation Windows.↑ Back to top

R-value - A measure of the resistance of a glazing material or fenestration assembly to heat flow.  It is the inverse of the U-factor (R=1/U) and is expressed in units of hr sq-ft ·F/Btu. A high R-value window has a greater resistance to heat flow and a higher insulating value than one with a low R-value.↑ Back to top

Radiation - The transfer of heat in the form of electromagnetic waves from one separate surface to another.  Energy from the sun reaches the earth by radiation and a person's body can lose heat to a cold window or skylight surface in a similar way.↑ Back to top

Renovation MasterFrame - Preservation's unique fusion-welded design that accommodates differing installation methods and architectural styles. It is the angled portion of the masterframe profile that adds a three dimensional appearance to the exterior of the window.↑ Back to top

Sash - Separate from the masterframe, the portion of the window that contains the glass.↑ Back to top

Sash Limit Locks - A feature that allows a window to be safely raised to a certain height.↑ Back to top

Sill - The horizontal, bottom section of the masterframe.↑ Back to top

Sliding Patio Door - A combination of fixed and sliding glass door panels that operates on solid brass roller tracks.  Available in 2-, 3- or 4-lite configurations with the operable panel available in any position.↑ Back to top

Sliding Window - A window in which the sashes move horizontally. Available in 2- or 3-lite configurations.↑ Back to top

Solar Heat Gain Coefficient (SHGC) - The fraction of solar radiation admitted through a window or skylight, both directly transmitted and absorbed and subsequently released inward. The solar heat gain coefficient has replaced the shading coefficient as the standard indicator of a window's shading ability. It is expressed as a number between 0 and 1. The lower a window's solar heat gain coefficient, the less solar heat it transmits and the greater its shading ability. SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly.↑ Back to top

Spacer - An object placed between two or more pieces of glass that helps to maintain a uniform width between the glasses, and helps prevent sealant distortion.↑ Back to top

SST Non-metal Spacer - A solid silicone foam spacer covered with Mylar. It is sealed to the edge of the glass and then sealed with butyl for greater energy efficiency.↑ Back to top

TrueCapture™ Sloped Sill - The sill of the Preservation Double-Hung Window that has a downward slope toward the outside with a capture dam that helps to keep water from infiltrating the base of the bottom sash. Sloped sill assists water drainage to the exterior of the window.↑ Back to top

U-value (U-factor) - A measure of the rate of non-solar heat loss or gain through a material or assembly. It is expressed in units of Btu/hr sq-ft ·F (W/sq-m ·C).  Values are normally given for NFRC/ASHRAE winter condition of 0·F (18·C) outdoor temperature, 70·F (21·C) indoor temperature, 15 mph wind and no solar load. The U-factor may be expressed for the glass alone or the entire window, which includes the effect of the frame and the spacer materials. The lower the U-factor, the greater a window's resistance to heat flow and the better its insulating value.↑ Back to top

UV Reflection - The percentage of ultraviolet rays being blocked rather than being transmitted through the window's glass unit. The higher the number, the lower the percentage of ultraviolet rays being transmitted through the window.↑ Back to top

Ultraviolet Light (UV) - The invisible rays of the spectrum that are outside of the visible spectrum at its short-wavelength violet end. Ultraviolet rays are found in everyday sunlight and can cause fading of paint finishes, carpets and fabrics.↑ Back to top

Visible Light - The portion of the electromagnetic spectrum that produces light that can be seen. Wavelengths range from 380 to 720 nanometers.↑ Back to top

Visible Transmittance (VT) - The percentage or fraction of the visible spectrum (380 to 720 nanometers) weighted by the sensitivity of the eye that is transmitted through the glazing.↑ Back to top

Warm-edge Technology - The use of low-conductance spacers to reduce heat transfer near the edge of insulated glazing.↑ Back to top

Weatherstripping - Material used to form a weather-resistant seal around operable sash.↑ Back to top

 
Preservation Collection Preservation Collection 5590 Lauby Rd., N. Canton, Ohio 44720 US Contact us by phone: 330.493.6141, Fax: 330.493.5756
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