Frt Plywood Roof Sheathing

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Frt plywood roof sheathing. Dricon introduced in 1981 is a class a fire retardant and preservative intended for wood used in interior weather protected construction this effective treatment is applied during manufacture creating a built. Compare click to add item roseburg fir plywood sheathing to the compare list. Abstract fire retardant treated frt plywood used as roof sheathing has exhibited strength degradation in some situations. Whether you re using plywood or lumber dricon fire retardant treated frt wood has an unmatched record of protection against flame spread smoke development rot and decay.

Fx lumber guard xt frt osb sheathing can be used in type ii iii and v construction as a listed component in fire rated interior wall exterior wall and roof deck assemblies and as an alternative to pressure impregnated frtw plywood. In virtually all cases engineered wood sheathing is certified for type ii iii and v construction. It s common for fire rated osb sheathing to be a code compliant component of numerous ul and intertek listed exterior and interior load bearing wall assemblies. Thermal degradation of fire retardant treated plywood between 1985 and 1995 approximately 750 000 multi family housing units experienced roofing problems due to fire retardant treated frt plywood sheathing failure figs.

The cause appears to be certain fire retardant chemicals that are activated under environmental conditions of high temperature and moisture content. Research at the usda forest service forest products. Requirements specifications for fire retardant plywood treatment for roof sheathing. The problem is caused by excessive exposure to solar radiation.

Frt or flame resistant plywood is or was required by building codes for certain structures such as on either side of the fire wall between building units in multiple living unit structures apartments condos townhouses. Frt plywood is a sheathing treated with a chemical to prevent flame spreading in the event of the fire. Description documents flamepro frtw wood has been tested for fire performance by several independent laboratories and meets model code requirements for a class a class 1 fire retardant. It adds proven performance and durability to new homes room additions and renovations.

Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance. It was used on townhouses and condos roofs 4 feet on each side sometimes more of the walls separating each individual unit in the late 1970 s to early 1980 s. Some frt plywood products are only certified for type v construction. This plywood has been grade stamped and third party inspected to ensure quality.