{"product_id":"malarkey-roofing-right-start-udl-underlayment","title":"Malarkey Right Start UDL SBS Modified Fiberglass Mat Roofing Underlayment Roll, 39-3\/8 in. x 66 ft.","description":"\u003ch1\u003eMalarkey Right Start UDL SBS Modified Fiberglass Mat Roofing Underlayment Roll, 39-3\/8 in. x 66 ft.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eMalarkey Right Start UDL is an SBS modified asphalt roofing underlayment on an inorganic fiberglass mat, sand coated, supplied as a roll measuring 39-3\/8 in. x 66 ft. Each roll weighs a minimum of 70 lb. Install one layer mechanically fastened to the sheathing under Class A asphalt shingles.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSBS modified asphalt:\u003c\/strong\u003e Inorganic fiberglass mat saturated with SBS modified asphalt for flexible, durable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSand coated:\u003c\/strong\u003e Surface is coated with sand for handling and installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass A rated:\u003c\/strong\u003e Tested to UL 790 and ASTM E108 as part of a Class A combustible deck assembly at 5:12 slope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge roll:\u003c\/strong\u003e Rolls are 39-3\/8 in. (1000 mm) wide and 66 ft. (20.12 m) long for fast coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlorida approved:\u003c\/strong\u003e Holds Florida Product Approval FL No. 14807 (non-HVHZ) and FL No. 15214 (HVHZ).\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\u003eMalarkey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUDL\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, 39-3\/8 in. x 66 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInorganic fiberglass mat saturated with SBS modified asphalt, sand coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39-3\/8 in. x 66 ft. roll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e66 ft. (20.12 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39-3\/8 in. (1000 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteep-slope roofing underlayment under asphalt shingles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFire rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClass A as part of listed assembly (UL 790 \/ ASTM E108)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum roll weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70 lb (31.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFlorida Product Approval FL No. 14807 (non-HVHZ), FL No. 15214 (HVHZ)\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\u003eEach 39-3\/8 in. x 66 ft. roll provides roughly 216 sq. ft. of raw material. Estimate roof area in squares and add allowance for side and end laps per the manufacturer's installation instructions.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eDesigned as the underlayment layer in Malarkey steep-slope residential roofing systems beneath Malarkey asphalt shingles. In the Class A listing, it is installed with one layer mechanically fastened to 3\/8-in. plywood sheathing with Class A shingles fastened over it.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included in the sell unit?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One roll of Malarkey Right Start UDL underlayment, 39-3\/8 in. wide and 66 ft. long, weighing a minimum of 70 lb.\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 The roll is about 216 sq. ft. of material before lap allowances; plan coverage based on the manufacturer's required overlaps.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it installed?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e In the Class A listing, one layer is mechanically fastened to 3\/8-in. plywood sheathing, with Class A asphalt shingles mechanically fastened over it at a 5:12 slope.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it fire rated?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is listed to UL 790 (2004) and ASTM E108 (2007) for Class A fire rating as part of the described combustible deck assembly.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Does it have Florida Product Approval?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, Malarkey roof underlayments carry FL No. 14807 for non-HVHZ and FL No. 15214 for HVHZ.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eRight Start UDL is a good upgrade over organic felt because the SBS modified asphalt and fiberglass mat give it better flexibility and tear resistance on the deck. Roll it out horizontally from the eave up, keeping laps shingle-style so water sheds downward. Match the fastening pattern in the manufacturer's instructions to preserve the Class A listing, and order rolls based on roof squares plus lap waste.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eUse fall protection and appropriate footwear when installing underlayment on sloped roofs, as modified asphalt surfaces can be slippery, especially when hot or damp.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Malarkey Right Start UDL underlayment rolls today and start your roof with a listed Class A base layer.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Malarkey","offers":[{"title":"Default Title","offer_id":53396029473135,"sku":"05MLRSUDL","price":127.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/ABC-Underlayment-Mineral-Surface-05MLRSUDL-primary.jpg?v=1789846385","url":"https:\/\/superarbor.io\/products\/malarkey-roofing-right-start-udl-underlayment","provider":"Super Arbor","version":"1.0","type":"link"}