Roofer’ Select shingle underlayment the ASTM D6757 standard and has more resistance to tearing and wrinkling than #15 type underlayment.

Typically, when installing water-resistant underlayment, side laps should be at least two inches and end laps at least six inches

One reason to use water resistant underlayment is that is part of Class A fire-rated shingle systems.

Joint overlaps for DiamondDeck are different than felt and vary by roof slope.

WinterGuard HT has more aggressive “tack” than granular or sand-surfaced WinterGuard and can be installed under asphalt shingles tile or metal roofs.

Metalayment is a film-surfaced product that meets ASTM D1970 and can only be applied under metal roofs.

All shingles applied to a low slope deck require the use of WinterGuard or its equivalent applied over the entire deck.

WinterGuard can be installed over the fascia board to protect against ice build-up in gutters.

Drip edge may be applied either over or under WinterGuard along the rake.

At the eaves, if there is a chance of snow or ice build-up in the gutters, never install drip edge under the WinterGuard.

WinterGuard can be applied when the temperature falls below 40 Degrees Fahrenheit.

For ice dam protection, WinterGuard must be applied along the eaves and up the roof no less the 24” beyond the interior wall line.

When applying Flintlastic SA, you have the option of installing either a 2-ply or 3-ply roof system.