Back Surfacing – Fine mineral matter applied to the back side of shingles to keep them from sticking.
Base flashing – That portion of the flashing attached to or resting on the deck to direct the flow of water onto the roof covering.
Blisters – Bubbles that may appear on the surface of asphalt roofing after installation.
Brands – Airborne burning embers released from a fire.
Bridging – A method of reroofing with metric-sized shingles.
Built-up roof – A flat or low-sloped roof consisting of multiple layers of asphalt and ply sheets.
Bundle – A package of shingles. There are 3, 4 or 5 bundles per square.
Butt edge – The lower edge of the shingle tabs.
BACKER ROD – In glazing, a polyethylene or polyurethane foam material installed under compression and used to control sealant joint depth, provide a surface for sealant tooling, serve as a bond breaker to prevent three-sided adhesion, and provide an hour-glass contour of the finished bead.
BACKFILL – (1) filling in any previously excavated area. (2) in carpentry, tthe process of fastening together two pieces of board by gluing blocks of wood in the interior angle.
BACKFLOW- The flow of liquids through irrigation into the pipes of a potable or drinking water supply from any source which is opposite to the intended direction of flow.
BACKFLOW PREVENTER - A device or means to prevent backflow into the potable water supply.
BACKHOE - Self powered excavation equipment that digs by pulling a boom mounted bucket towards itself. It is used to dig basements and/or footings and to install drainage or sewer systems.
BACK NAILING - The practice of nailing roofing felts to the deck under the overlap, in addition to hot mopping, to prevent slippage of felts.
BALLOON FRAMING – In carpentry, the lightest and most economical form of construction, in which the studding and corner plates are set up in continuous lengths from the first floor line or sill to the roof plate.
BAROMETER - Instrument for measuring atmospheric pressure.
BARREL ROOF - A roof design which in cross section is arched.
BASE PLY – An asphalt-saturated and/or coated felt installed as the first ply with 4 inch laps in a built-up roof system under the following felts which can be installed in a shingle-like fashion.
BATTEN PLATE – A formed piece of metal designed to cover the joint between two lengths of metal edge.
BATT INSULATION- Strips of insulation – usually fiberglass, that fit between studs or other framing.
BEAD – In glazing, an applied sealant in a joint irrespective of the method of application, such as caulking bead, glazing bead, etc. Also a molding or stop used to hold glass or panels in position.
BEAM – Structural support member (steel, concrete, lumber) that transfers weight from one location to another.
BED OR BEDDING – In glazing, the bead compound or sealant applied between a lite of glass or panel and the stationary stop or sight bar of the sash or frame. It is usually the first bead of compound or sealant to be applied when setting glass or panels.
BELL REDUCER – In plumbing, a fitting shaped like a bell which has one opening of a smaller diameter used to reduce the size of the pipe in the line, and the opposite opening of larger diameter.
BELOW-GRADE – The portion of a building that is below ground level.
BENT GLASS – Flat glass that has been shaped while hot into curved shapes.
BEVEL – (of a door) is the angle of the front edge of a door usually from 1/8" to 2".
BID BOND – Security posted by a bidder to ensure performance in accordance with a bid.
BIDDING – Getting prices from various contractors and/or subcontractors.
BID DOCUMENTS – Drawings, details, and specifications for a particular project.
BITE – The dimension by which the framing system overlaps the edge of the glazing infill.
BITUMEN – Any of various mixtures of hydrocarbons occurring naturally or obtained through the distillation of coal or petroleum. (See Coat Tar Pitch and Asphalt)
BLEEDING – A migration of a liquid to the surface of a component or into/onto an adjacent material.
BLISTER – An enclosed raised spot evident on the surface of a building. They are mainly caused by the expansion of trapped air, water vapor, moisture or other gases.
BLOCKING – In carpentry, the process of fastening together two pieces of board by gluing blocks of wood in the interior angle.
BLUE PRINTS- Architectural plans for a building or construction project, which are likely to include floor plans, footing and foundation plans, elevations, plot plans, and various schedules and or details.
BOARD FOOT – In carpentry, the equivalent of a board 1 foot square and 1 inch thick.
BOND BREAKER – A substance or a tape applied between two adjoining materials to prevent adhesion between them.
BOND PLASTER – In addition to gypsum, bond plaster contains 2-5% lime by weight and chemical additives which improve the bond with dense non-porous surfaces such as concrete. It is used as a base coat.
BOW (AND WARP) – A curve, bend or other deviation from flatness in glass.
BRACING - Ties and rods used for supporting and strengthening various partS of a building used for lateral stability for columns and beams.
BRAKE METAL – Sheet metal that has been bent to the desired configuration.
BROWNCOAT- The coat of plaster directly beneath the finish coat. In three-coat work, the brown is the second coat.
BTU – British Thermal Unit – The amount of heat energy required to raise the temperature of one pound of water through a change of one degree F.
BUBBLING – In glazing, open or closed pockets in a sealant caused by release, production or expansion of gasses.
BUILDING BRICK – Brick for building purposes not especially treated for texture or color, formerly called "common brick." It is stronger than face brick.
BUILDING PERMIT - Written authorization from the city, county or other governing regulatory body giving permission to construct or renovate a building. A building permit is specific to the building project described in the application.
BULLFLOAT – A tool used to finish and flatten a slab. After screeding, the first stage in the final finish of concrete, smoothes and levels hills and voids left after screeding. Sometimes substituted for darbying. A large flat or tool usually of wood, aluminum or magnesium with a handle.
BUTTERFLY ROOF – A roof assembly which pitches sharply from either side toward the center.
BUTTERING – In glazing, application of sealant or compound to the flat surface of some member before placing the member in position, such as the buttering of a removable stop before fastening the stop in place.
BUTT GLAZING – The installation of glass products where the vertical glass edges are without structural supporting mullions.
BUTYL – Type of non-curing and non-skinning sealant made from butylene. Usually used for internal applications.
BX – ARMORED CABLE – A factory assembly of insulated conductors inside a flexible metallic covering. It can be run except where exposed to excessive moisture and should not be run below grade. It must always be grounded and uses its armor as an equipment ground. It is difficult to pull out old wires or insert new ones.
BALLAST – Weight used to protect single-ply roofs or to prevent blow off of systems which are not adhered.
BACK NAILING – The practice of nailing roofing felts to the deck under the overlap, in addition to hot mopping, to prevent slippage of felts.
BARE SPOTS – Small areas on a roof where the top membrane has become exposed to the elements.
BARREL ROOF – A roof design which in cross section is arched.
BASE PLY – An asphalt-saturated and/or coated felt installed as the first ply with 4 inch laps in a built-up roof system under the following felts which can be installed in a shingle like fashion.
BATTEN PLATE – A formed piece of metal designed to cover the joint between two lengths of metal edge.
BITUMEN – Any of various mixtures of hydrocarbons occurring naturally or obtained through the distillation of coal or petroleum. (See Coat Tar Pitch and Asphalt)
BLISTER – An enclosed raised spot evident on the surface of a roof. They are mainly caused by the expansion of trapped air, water vapor, moisture or other gases. Blisters on a roof may involve only the coating, one or more plies of felt or may involve the whole membrane thickness.
BEAD – A semi-rounded strip (bead) of caulking material.
BEAM – A heavy main support structure, steel or wood running horizontally between columns or load bearing walls.
BOND BREAKER – A substance or a tape applied between two adjoining materials to prevent adhesion between them.
BRAKE METAL – Sheet metal that has been bent to the desired configuration.
BUILT-UP ROOF – BUR – A roof consisting minimally of a BUR membrane but may also include insulation, vapor retarders and other components.
BUILT-UP ROOF MEMBRANE – BURM A built-up roof consisting of plies or layers of roofing felt bonded together on site with bitumen; either tar or asphalt.
BULB-TEE – A specialized steel reinforcing member which support form boards and reinforces a gypsum deck, which when poured surrounds the Bulb-Tee.
BUTTERFLY ROOF – A roof assembly which pitches sharply from either side toward the center. |
