{"product_id":"no-15-felt-paper-roofing-underlayment-fp15","title":"No. 15 Felt Paper Roofing Underlayment","description":"\u003cp\u003eNo. 15 asphalt-saturated felt is the traditional organic or fiberglass mat sheet saturated with asphalt and supplied in rolls. It is installed over a roof deck ahead of shingles as a secondary water-shedding layer and a separation sheet between the deck and the finish roofing.\u003c\/p\u003e\n\u003cp\u003eThe sheet is rolled out horizontally from the eave up, lapped shingle-fashion so water runs over each seam, and fastened with roofing nails, cap nails or staples depending on the deck and local practice. The lighter No. 15 weight is the common choice under asphalt shingle work, where No. 30 is reserved for heavier or steeper assemblies.\u003c\/p\u003e\n\u003cp\u003eBeyond roofing, felt paper is widely used as a slip sheet and a weather-resistive layer behind siding, stucco lath and masonry veneer, and as a temporary dry-in while a building is being closed up.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAsphalt-saturated felt sheet supplied in rolls for continuous coverage\u003c\/li\u003e\n\u003cli\u003eNo. 15 weight, the lighter of the two standard roofing felt classes\u003c\/li\u003e\n\u003cli\u003eSheds water as a secondary barrier beneath shingles and other finish roofing\u003c\/li\u003e\n\u003cli\u003eCuts with a utility knife and tears cleanly at the fastener line if overdriven\u003c\/li\u003e\n\u003cli\u003eFastens with roofing nails, cap nails or staples over wood decking\u003c\/li\u003e\n\u003cli\u003eActs as a separation layer between the deck and the roof covering\u003c\/li\u003e\n\u003cli\u003eLays flat and conforms over valleys, hips and minor deck irregularities\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShingle underlayment on sloped wood-decked roofs\u003c\/li\u003e\n\u003cli\u003eTemporary dry-in of a roof deck during construction\u003c\/li\u003e\n\u003cli\u003eWeather-resistive layer behind wood, fiber cement or vinyl siding\u003c\/li\u003e\n\u003cli\u003eBacking behind stucco lath and masonry veneer walls\u003c\/li\u003e\n\u003cli\u003eSlip sheet between dissimilar materials\u003c\/li\u003e\n\u003cli\u003ePatch and repair work on existing shingle roofs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Roofing felt underlayment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight Class:\u003c\/strong\u003e No. 15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Asphalt-saturated felt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Roll\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Roof decks, wall sheathing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ARCH Building Supply","offers":[{"title":"Default Title","offer_id":55048724316499,"sku":"FP15","price":27.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/7743\/4195\/files\/arch-placeholder-coming-soon_48989af7-f5e0-49ca-9e4a-2c648803979e.webp?v=1790259797","url":"https:\/\/arch-9365.myshopify.com\/zh\/products\/no-15-felt-paper-roofing-underlayment-fp15","provider":"ARCH","version":"1.0","type":"link"}