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damper. A metal door placed within the fireplace chimney; normally closed when the fireplace is not in use dampproofing. The black, tar like waterproofing material applied to the exterior of a foundation wall daylight. The terminal end of a pipe that is not attached to anything dead bolt. An exterior security lock installed on exterior entry doors that can be activated only with a key or thumb-turn; unlike a latch, which has a beveled tongue, dead bolts have square ends dead light. The fixed, non-operable window section of a window unit deck, decked. To install the plywood or wafer board sheeting on the floor joists, rafters, or trusses; also the surface, installed over the supporting framing members, to which the roofing is applied Deck paint. An enamel with a high degree of resistance to mechanical wear, designed for use on such surfaces as porch floors dedicated circuit. An electrical circuit that serves only one appliance (i.e., a dishwasher) or a series of electric heaters or smoke detectors default. Breach of a mortgage contract (not making the required payments) de-humidistat. A control mechanism used to operate a mechanical ventilation system based upon the relative humidity in the home delamination. Separation of the plies in a panel due to failure of the adhesive; usually caused by excessive moisture density. The mass of substance in a unit volume; when expressed in the metric system, it is numerically equal to the specific gravity of the same substance dewpoint. Temperature at which a vapor begins to deposit as a liquid; applies especially to water in the atmosphere direct nailing. To nail perpendicular to the initial surface or to the junction of the pieces joined; also known as face nailing. disconnect. A large (generally 20-Amp) electrical ON-OFF switch discount rate. A mortgage interest rate that is lower than the current rate for a certain period of time (e.g., 2.00% below variable rate for two years) diverter valve. A device that changes the direction of water flow from one faucet to another doorjamb, interior. The surrounding case into which and out of which a door closes and opens; consists of two upright pieces, called side jambs, and a horizontal head jamb; have the "door stop" installed on them door operator. An automatic garage door opener door stop. The wooden style that the door slab will rest upon when in a closed position dormer. An opening in a sloping roof, the framing of which projects out to form a vertical wall suitable for windows or other openings double coverage. Application of asphalt roofing so that the lapped portion is at least 2 inches wider than the exposed portion, resulting in two layers of roofing material over the deck double glass. Window or door in which two panes of glass are used with a sealed air space between; a.k.a. insulating glass double-hung window. A window with two vertically sliding sashes, both of which can move up and down down payment. The difference between the sales price and the mortgage amount; usually paid at closing downspout. A pipe, usually of metal, for carrying rainwater down from the roof's horizontal gutters drain tile. A perforated, corrugated plastic pipe laid at the bottom of the foundation wall and used to drain excess water away from the foundation; prevents ground water from seeping through the foundation wall; a.k.a. perimeter drain draw. The amount of progress billings on a contract that is currently available to a contractor under a contract with a fixed payment schedule dressed and matched (tongued and grooved). Boards or planks machined in such a matter that there is a groove on one edge and a corresponding tongue on the other drip. (1) A member of a cornice or other horizontal exterior finish course that has a projection beyond the other parts for throwing off water (2) a groove in the underside of a sill or drip cap to cause water to drop off on the outer edge instead of drawing back and running down the face of the building drip cap. A molding or metal flashing placed on the exterior topside of a door or window frame to cause water to drip beyond the outside of the frame drip edge. A non-corrosive, non-staining material used along the eaves and rakes to allow water runoff to drip clear of underlying construction dry in. To install the black roofing felt (tar paper) on the roof dry rot. fungal wood rot drywall (or Gypsum Wallboard (GWB), Sheet rock or Plasterboard). Wall board or gypsum- A manufactured panel made out of gypsum plaster and encased in a thin cardboard. Usually 1/2" thick and 4' x 8' or 4' x 12' in size; nailed or screwed onto the framing and the joints are taped and covered with a 'joint compound'; 'green board' type drywall has a greater resistance to moisture than regular (white) plasterboard and is used in bathrooms and other "wet areas" ducts. The heating system. Usually round or rectangular metal pipes installed for distributing warm (or cold) air from the furnace to rooms in the home; also a tunnel made of galvanized metal or rigid fiberglass, which carries air from the heater or ventilation opening to the rooms in a building due-on-sale. A clause in a mortgage contract requiring the borrower o pay the entire outstanding balance upon sale or transfer of the property dura board, dura rock. A panel made out of concrete and fiberglass usually used as a ceramic tile backing material; commonly used on bathtub decks; a.k.a. wonder board DWV (drain-waste-vent)- The section of a plumbing system that carries water and sewer gases out of a home
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