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    Author(s): Susan LeVan; Mary Collet
    Date: 1989
    Source: Gen. Tech. Rep. FPL-GTR-62. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.
    Publication Series: General Technical Report (GTR)
    Station: Forest Products Laboratory
    PDF: View PDF  (717 KB)

    Description

    Fire-retardant-treated (FRT) plywood used as roof sheathing has exhibited strength degradation in some situations. The cause appears to be certain fire retardant chemicals that are activated under environmental conditions of high temperature and moisture content. This report describes how fire retardants are made, how they work, and what causes strength degradation of FRT wood. We present guidelines for selecting and using FRT wood and precautions to follow when designing roof systems with FRT plywood.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    LeVan, Susan; Collet, Mary. 1989. Choosing and applying fire-retardant-treated plywood and lumber for roof designs. Gen. Tech. Rep. FPL-GTR-62. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.

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    Keywords

    Degradation, strength, flammability, moisture, plywood, fire retardant, roof

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