Backerboard — a flat material used on the face of the house, applied between the studs and the siding (or over existing wall surface), to provide an even surface for installing vinyl siding.
Buttlock — the bottom edge of a siding or soffit panel, or accessory piece, opposite the nailing slots, which locks onto to the preceding panel.
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.).
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.
H-Channel — a siding accessory that joins two soffit panels, or used as transition between two siding sections.
Face — refers to the side of a siding or soffit panel that is showing once the panel has been installed.
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.
Fascia — the trim covering the ends of roof rafters and gables.
Fascia Board — a board attached to the ends of the rafters and gables between the roofing material and the soffit overhang. Fascia cap is the covering around that board.
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. Flashing is also used around the windows and doors.
Furring/Furring Strip — usually a 1” x 2” wood strip used to even a surface in preparation for installing vinyl siding. To “fur” a surface means to apply these strips.
Lap — to overlap the ends of two siding panels or accessory pieces to allow for expansion and contraction.
Tab — the raised “ears” on a siding panel, created by a snap lock punch, which can be used to lock a siding panel into place when the nailing hem has been removed.
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.
Nailing Hem — the section of siding or accessories where the nailing slots are located.
Plumb — a position or measurement that is truly and exactly vertical, 90° from a level surface.
Rake (roof) — the inclined, usually projecting edge of a sloping roof. Rake (wall)—the board or molding placed along the sloping sides of a gable to cover the ends of the siding.
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.
Sealant — any of a variety of compounds used to fill or seal joints in wood, metal, masonry, vinyl, and other materials.
Shim — a building material used to even a surface prior to installing vinyl siding.
Soffit — material used to enclose the horizontal underside of an eave, cornice, or overhang. Soffit is designed to be installed lengthwise from wall to fascia.
Starter Trim — an accessory applied directly to the surface of the building and used to secure the first course of siding to the home.
Square — a square represents an area of 10’ by 10’ (100 sq. ft.) and is generally the term used in the industry v when referring to the quantity of siding. Vinyl siding is measured in squares, i.e.: this house requires 20 squares of siding.
Underlayment/Underlayment Board — weather resistant material placed under vinyl -siding panels.
Undersill Trim — a piece of trim used any time the top lock has been removed from the siding, to secure a siding panel.
Weep Holes — openings cut into siding or accessories to allow for water runoff.
Window/Door Drip Cap — an accessory installed with vertical siding to ensure that water drips away from panels and does not infiltrate them.
Outside and Inside Corner Posts — Corner posts are used to provide a finished edge at an inside or outside -corner. The siding from adjoining walls fits neatly into the inside or outside corner post channels.
Appropriate widths of channel openings are available to accommodate various configurations of siding.