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Definition of the term Fire Stop

A solid, tight closure of a concealed space, placed to prevent the spread of fire and smoke through such a space. In a frame wall, this will usually consist of 2x4s cross blocking between studs.

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Definition of the term Glass-Seal

3-tab self-sealing fiberglass shingles with a traditional square-tab design. A thick layer of weathering-grade asphalt gives them extra waterproofing protection. They are U.L. Class A fire rated and backed by a 20-year limited warranty. Algae-resistant granules optional.

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