{"product_id":"gaf-gafglas-75-base-sheet-3-sq-roll-39-3-8-in-x-97-ft-6-in","title":"GAF GAFGLAS #75 Base Sheet 3 SQ Roll (39-3\/8 in. x 97 ft. 6 in.)","description":"\u003ch2\u003e#75 Roofing Base Sheet Roll\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003eGAFGLAS® #75 Base Sheet is a premium built-up roofing (BUR) asphaltic base sheet made with a strong glass mat. Its closed-sheet design helps prevent asphalt bleed-through and can serve as a flame retarder when used under torch-applied modified bitumen membranes.\u003c\/strong\u003e\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eKey Features:\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Rolls out flat for quicker, easier placement.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eClosed-Sheet Design:\u003c\/strong\u003e Coated on both sides to help prevent asphalt bleed-through.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eFire Performance Support:\u003c\/strong\u003e Designed to meet UL Class A ratings and can act as a flame retarder in torch-applied systems.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eCommercial-Grade Standards:\u003c\/strong\u003e Listed\/approved to multiple standards and approvals including ASTM D4601 Type II and UL\/ULC listings.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eJobsite Coverage:\u003c\/strong\u003e One 3-square roll provides 300 sq. ft. of coverage.\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eSpecifications Table:\u003c\/h3\u003e \u003ctable\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e \u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eProduct Name\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGAF #75 Base Sheet 3SQ\/RL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGAF #75 Base Sheet 3 Square Roll\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eRoofing Materials\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBuilt-Up Roofing (BUR) Asphalt Membranes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eRL - Roll\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eRoll Coverage\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e300 sq. ft. (3 squares)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eRoll Size (Width x Length)\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e39-3\/8 in. x 97 ft. 6 in.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePackaging\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e3 SQ. Roll\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial \/ Reinforcement\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eStrong glass mat\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSheet Design\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCoated on both sides; closed-sheet design to help prevent asphalt bleed-through\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eUse Case\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSuitable for nailable specifications (e.g., plywood) where bleed-through is a concern\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSystem Compatibility \/ Performance Note\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSealed sheet serves as an effective flame retarder for application of torch-applied modified bitumen membranes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFire Rating Design Note\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eDesigned to meet UL Class A ratings\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eApplicable Standards \/ Approvals\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eASTM D4601, Type II; FM Approved; ICC ESR-1274; Miami-Dade County Approved; UL\/ULC Listed\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eManufacturer Product Number\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGAF75BS\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eManufacturer Number\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e3300000\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eItem Weight\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e75 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eStyle\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBuilt Up Roofing\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003chr\u003e \u003ch3\u003eFrequently Asked Questions (FAQ):\u003c\/h3\u003e \u003cp\u003e\u003cstrong\u003eQ: What is this base sheet used for?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e It’s a BUR\/asphaltic base sheet used as an underlying ply in commercial roofing systems and is also used where bleed-through is a concern (such as plywood nailable decks).\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cstrong\u003eQ: How much area does one roll cover?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e Each roll is a 3-square roll and covers 300 sq. ft.\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cstrong\u003eQ: What are the roll dimensions?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e The roll size is 39-3\/8 in. wide x 97 ft. 6 in. long.\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cstrong\u003eQ: Can it be used with torch-applied modified bitumen?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e Yes—its sealed, closed-sheet design can serve as an effective flame retarder for torch-applied modified bitumen membrane applications.\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cstrong\u003eQ: Does it meet recognized industry standards?\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003eA:\u003c\/strong\u003e Yes—applicable standards\/approvals listed include ASTM D4601 Type II, FM Approved, ICC ESR-1274, Miami-Dade County Approved, and UL\/ULC Listed.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eThe Unsung Foundation of a Fearless Roof\u003c\/h3\u003e \u003cp\u003eLuxury starts with what you don’t see—the quiet, decisive layer that makes everything above it perform beautifully. This GAFGLAS® #75 base sheet brings a refined, engineered confidence with its strong glass mat and closed-sheet design that helps resist asphalt bleed-through. Think of it as the tailored lining inside a couture jacket: invisible, essential, and impeccably functional. When you’re building for longevity and elevated performance, this is the foundational move that sets the tone.\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cstrong\u003eBuild your roofing system on a stronger foundation—choose GAFGLAS® #75 Base Sheet for reliable coverage and commercial-grade performance.\u003c\/strong\u003e\u003c\/p\u003e","brand":"GMC_Traffic","offers":[{"title":"Default Title","offer_id":55154292457763,"sku":"gmc16-01113","price":18.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/8730\/5507\/files\/5704b441c85f1813.jpg?v=1779819112","url":"https:\/\/a2ztoyshop.us.com\/products\/gaf-gafglas-75-base-sheet-3-sq-roll-39-3-8-in-x-97-ft-6-in","provider":"Grandview Hobbies","version":"1.0","type":"link"}