Roofing Glossary

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There are 9 names in this directory beginning with the letter B.
Back surfacing
Fine mineral matter applied to the back side of shingles to keep them from sticking.

Balanced system
A ventilation system where 50% of the required ventilating area is provided by vents located in the upper portion of the roof with the balance provided by undereave or soffit vents.

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 metricsized shingles.

Built-up roof
A flat or low-slope 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.