- Insurance coverage on a construction project during construction, including extended coverage that may be added for the contract for the customer's protections.

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British Thermal Unit (BTU)

The amount of heat required to raise the temperature of 1 pound (lb) of water by 1 degree Fahrenheit (F).

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Building codes-

Community ordinances governing the manner in which a home may be constructed or modified.

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Building Line

A defined limit within a property line beyond which a structure may not protrude.

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Building insurance

Insurance covering the structure of the building.

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Building paper

A general term for papers, felts, and similar sheet materials used in buildings without reference to their properties or uses. Generally comes in long rolls.

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Building Envelope

The enclosure that contains a building's maximum volume.

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Building Sewer

Horizontal piping that carries the waste discharge from the building drain to the public sewer or septic tank.

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Bull nose (drywall)

- Rounded drywall corners.

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Built-Up Roof Membrane

A continuous, semi-flexible roof membrane built up fo plies of saturated felts, coated felts, fabrics, or mats that have surface coats of bitumens. The last ply is covered with mineral aggregates, bituminous materials, or a granular-surface roofing sheet.

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Bundle

A package of shingles. Normally, there are 3 bundles per square and 27 shingles per bundle.

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Built-up roof

Roofing composed of three to five layers of asphalt felt laminated with coal tar, pitch, or asphalt. The top is finished with crushed slag or gravel. Generally used on flat or low-pitched roofs.

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Building Drain

The lowest horizontal piping of a plumbing drainage system that receives the discharge from soil, waste, and other drainage pipes within the building and carries the wasted to the building sewer.