is it a mistake to put roof underlayment under densdeck

Technical Guide: DensDeck® Roof Boards: DensDeck®, DensDeck .

DensDeck Roof Boards are typically utilized in these constructions as an insulation underlayment. In some assemblies it will be used as an insulation overlayment or cover board (1/4” (6.4 mm), 1/2” (12.7 mm) or 5/8” (15.9 mm)).

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TECHNICAL GUIDE - Georgia-Pacific Building Products

DensDeck Roof Boards are typically utilized in these constructions as an insulation underlayment. In some assemblies it will be used as an insulation overlayment or cover board (1/4” (6.4 mm), 1/2” (12.7 mm) or 5/8” (15.9 mm)).

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DensDeck Prime Roof Board - Technical Notes

DensDeck Roof Boards are typically utilized in these constructions as an insulation underlayment. In some assemblies it will be used as an insulation overlayment or cover board (1/4” (6.4 mm), 1/2” (12.7 mm) or 5/8” (15.9 mm)).

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Roof Underlayment Requirements & Recommendations - is roofing .

The roof deck should be sound and level before laying the underlayment. Fifteen-pound or heavier felt underlayment is required by code in some areas. Whether or not it is required, underlayment is cheap insurance against problems. There are several good reasons to install underlayment:

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What is Roof Underlayment & Why is it Needed? | Long Roofing

What is roofing underlayment? Roofing underlayment is a water-resistant or waterproof barrier material installed directly onto your roof deck. It’s applied under all other roofing materials as an added layer of protection from severe weather such as rain, wind, and snow. There are three main types of roofing underlayment used under roof .

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GAF | DensDeck® Roof Board Roof Insulation

An excellent fire barrier, DensDeck ® Roof Boards feature a noncombustible core and inorganic surface that offer greater fire protection than other conventional commercial roofing products when applied over combustible roof decks and steel decks. DensDeck ® Roof Boards are FM tested and approved as the only 1/2" gypsum product to meet the .

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DensDeck Roof Boards | Gypsum Roof Boards & Cover Board Panels

The fiberglass mat-faced, noncombustible (as described and tested in accordance with ASTM E136), nonstructural, gypsum core panels provide superior fire resistance and protection from hail damage and hold up well under normal construction and maintenance foot traffic while stiffening and stabilizing roof decks. DensDeck Roof Boards are easy to .

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