Construction Technology Quiz 7

built-up roofing

A continuous roof covering made up of laminations or plies of saturated or coated roofing felts, alternated with layers of asphalt or coal-tar pitch and surfaced with a layer of gravel or slag in a heavy coat of asphalt or coal-tar pitch or finished with a cap sheet; generally used on flat or low-pitched roofs.

batt insulation

A flexible blanket-type thermal insulation, commonly used as insulation between studs or joists in frame construction; also used as an acoustical material or a component in sound-insulating construction. Usually made from rock, slag, or glass fibers. Sometimes has a vapor barrier on one side or is entirely enclosed in paper with a vapor barrier on one side. Nominally 16 (40.6 cm) or 24 in. (61 cm) wide, and approx. 1 to 6 in. (2.5 to 15 cm) thick.

expanded polystyrene

A foamed styrene plastic; has high resistance to heat flow; mechanical strength relatively high for such a light material.

plywood

A panel (normally 4' X 8') of wood made of three or more layers of veneer, compressed and joined with glue, and usually laid with the grain of adjoining plies at right angles to give the sheet strength.

gutter

A shallow channel or conduit of metal or wood set below and along the (fascia) eaves of a house to catch and carry off rainwater from the roof.

flashing

A thin impervious material placed in construction (e.g., in mortar joints and through air spaces in masonry) to prevent water penetration and/or provide water drainage, esp. between a roof and wall, and over exterior door openings and windows. Sheet metal or other material used in roof and wall construction to protect a building from water seepage.

double-hung

A window having two vertically sliding sashes, each closing a different part of the window; the weight of each sash is counterbalanced for ease of opening and closing.

casement

A window sash (ventilator, 2) which swings open along its entire length; usually on hinges fixed to the sides of the opening into which it is fitted; see casement window

underlayment

A ¼" material placed over the subfloor plywood sheeting and under finish coverings, such as vinyl flooring, to provide a smooth, even surface. Also a secondary roofing layer that is waterproof or waterresistant, installed on the roof deck and beneath shingles or other rooffinishing layer

exterior insulation and finishing system

An exterior finish for a building composed of polystyrene foam covered with a synthetic stucco; this type of stucco (in contrast totraditional, porous cement-based stucco) is waterproof and is sprayed on

scupper

An opening in a wall or parapet that allows water to drain from a roof.

high-density overlay

An overlay consisting of paper that is impregnated with a thermosetting resin and then applied to plywood; provides a smooth, hard, wear-resistant surface for high-quality concrete formwork and decking.

medium-density overlay

An overlay of paper impregnated with a thermosetting resin; applied by a hot-press to plywood, fiberboard, medallion molding medullary rays particleboard, etc., usually to improve its appearance and durability.

composition shingles

Shingles manufactured from saturated roofing felts (rag, asbestos, or fiber glass) coated with asphalt and having mineral granules on the side exposed to the weather.