{"product_id":"gaf-0914000mvy-gaf-weatherwatch-mineral-surfaced-leak-barrier-roll-66-7-ft-x-3-ft-200-sq-ft-coverage","title":"GAF WeatherWatch Mineral-Surfaced Leak Barrier Roll, 66.7 ft x 3 ft, 200 sq ft Coverage","description":"\u003ch1\u003eGAF WeatherWatch Mineral-Surfaced Leak Barrier Roll, 66.7 ft x 3 ft, 200 sq ft Coverage\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis is GAF WeatherWatch Mineral-Surfaced Leak Barrier in a 66.7 ft roll covering 200 sq ft, a self-adhering underlayment used at eaves, rakes, valleys, hips and ridges. It may be applied directly to plywood, OSB, wood planks, concrete, masonry or Loadmaster surfaces. Pair it with GAF starter strips, deck protection and Timberline shingles as part of a GAF roofing system.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e200 sq ft roll:\u003c\/strong\u003e One roll provides 66.7 ft of coverage totaling 200 sq ft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-adhering:\u003c\/strong\u003e Split-release film lets you bond the sheet to the deck in halves for easier positioning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide substrate range:\u003c\/strong\u003e May be applied directly to plywood, OSB, non-chamfered wood planks, concrete, masonry or Loadmaster surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCode approvals:\u003c\/strong\u003e Holds ICC-ES ESR-1322, ASTM D1970, Miami-Dade County, Florida Building Code and UL Classification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporary exposure:\u003c\/strong\u003e Must be covered with roofing as soon as possible and no more than 60 days after installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple fastening:\u003c\/strong\u003e Back-nail every 18 in. along the selvage edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIce-dam defense:\u003c\/strong\u003e Install up the roof at least 24 in. past the interior warm wall to help prevent leaks from wind-driven rain and ice dams.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGAF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0914000MVY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 roll, 66.7 ft, 200 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWeatherWatch Mineral-Surfaced Leak Barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e66.7 ft roll, 200 sq ft coverage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage per unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMineral-surfaced asphalt leak barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eICC-ES ESR-1322; ASTM D1970; Miami-Dade County Approved; Florida Building Code Approved; UL Classified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApply when deck is dry and air temperature is between 45°F and 120°F (7°C–49°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExposure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCover with roofing within 60 days of installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNailing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBack nail every 18 in. in the selvage edge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverlap\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 in. minimum end laps; 3 in. minimum for additional courses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85 lb per roll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLeak barrier underlayment at eaves, rakes, valleys, hips and ridges in steep-slope roofing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStore rolls on end, under cover, below 100°F (38°C); do not double-tier pallet rolls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eCoverage \u0026amp; How Much You Need:\u003c\/h2\u003e\u003cp\u003eOne roll measures 66.7 ft long and covers 200 sq ft. Install adjacent sheets with a minimum 6 in. end lap and overlap successive courses by at least 3 in., so plan your footage allowing for laps at valleys, eaves and rakes.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eWeatherWatch pairs with GAF starter strips, roof deck protection, shingles and ridge caps as part of the GAF roofing system. It bonds to plywood, OSB, wood planks, concrete, masonry and Loadmaster decks; prime concrete and masonry with Matrix 307 or another ASTM D41 primer first. GAF cautions against incompatible leak barriers from other manufacturers and against direct application to resin-heavy wood plank decks.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: How much area does one roll cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 66.7 ft roll covers 200 sq ft. Account for the required 6 in. end laps and 3 in. course overlaps when sizing your job.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What surfaces can it be applied to?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It may be applied directly to plywood, OSB, non-chamfered wood planks, concrete, masonry or Loadmaster surfaces. Prime concrete and masonry with an ASTM D41 primer such as Matrix 307; no priming is needed on wood.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How long can it stay exposed?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It should be covered with roofing as soon as possible and no more than 60 days after installation.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What temperature is best for installation?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Apply when the deck is dry and the air temperature is between 45°F and 120°F (7°C to 49°C).\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it installed at eaves and valleys?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e At the eave, install drip edge first, then the leak barrier; at the rake, install the barrier before the drip edge. Cut into 10–20 ft lengths, align flush to the drip edge with the selvage edge up, remove the release film in halves and roll laps firmly with a hand roller.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I use it with non-GAF leak barriers on the same roof?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e GAF warns that incompatible leak barriers can cause softening, flowing and dripping of the asphalt compound, potentially staining fascia, gutters and building exteriors, and recommends checking gaf.com for compatibility.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eUse WeatherWatch wherever ice dams and wind-driven rain are a concern: eaves, rakes, valleys, and any penetration. Install at least 24 in. past the interior warm wall line at the eave, and hand-roll every lap to ensure a watertight seam. Follow GAF's 45°F–120°F application window and cover within 60 days. On wood plank decks with high resin content, evaluate the substrate before direct application to avoid asphalt bleed-out and staining.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eDo not walk on the membrane before it has bonded to the substrate, and follow all applicable roofing safety requirements during installation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the GAF WeatherWatch Mineral-Surfaced Leak Barrier roll today to protect your eaves, valleys and rakes.\u003c\/strong\u003e\u003c\/p\u003e","brand":"GAF","offers":[{"title":"Default Title","offer_id":53521554375023,"sku":"0914000MVY","price":171.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/10643_default_hero.jpg?v=1790178469","url":"https:\/\/superarbor.io\/products\/gaf-0914000mvy-gaf-weatherwatch-mineral-surfaced-leak-barrier-roll-66-7-ft-x-3-ft-200-sq-ft-coverage","provider":"Super Arbor","version":"1.0","type":"link"}