{"product_id":"4-in-aluminum-roof-flashing-af4","title":"4 in. Aluminum Roof Flashing","description":"\u003cp\u003eAluminum flashing is thin, formable sheet metal used to close the joints where a roof meets a wall, a chimney, a valley or a penetration, directing water back onto the roof covering instead of into the structure below. Aluminum is soft enough to be bent, cut and dressed with hand tools on site, and it forms a self-limiting oxide layer that keeps it from rusting the way uncoated steel does.\u003c\/p\u003e\n\u003cp\u003eThis 4 in. width is a common size for step flashing, roll flashing and repair pieces, where a narrow leg is worked under shingles or siding and the balance is turned up against the adjoining surface. It is cut with tin snips and fastened or bonded with roofing cement or sealant, depending on the detail.\u003c\/p\u003e\n\u003cp\u003eAluminum should be kept away from direct contact with fresh masonry, mortar and pressure-treated lumber, and separated from copper, since alkaline materials and dissimilar metals promote corrosion.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFormed from aluminum sheet, which resists rust and does not require painting for corrosion protection\u003c\/li\u003e\n\u003cli\u003eSoft enough to be cut with snips and bent or dressed to the roof detail by hand on site\u003c\/li\u003e\n\u003cli\u003e4 in. nominal width suited to step, wall and penetration flashing details\u003c\/li\u003e\n\u003cli\u003eLightweight compared with steel or copper flashing of the same gauge, easing handling on a roof\u003c\/li\u003e\n\u003cli\u003eCompatible with asphalt shingle, roll roofing and most siding assemblies\u003c\/li\u003e\n\u003cli\u003eCan be bedded in roofing cement or sealant and fastened with compatible nails\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStep flashing where a sloped roof meets a vertical wall\u003c\/li\u003e\n\u003cli\u003eHeadwall and sidewall flashing on dormers and additions\u003c\/li\u003e\n\u003cli\u003eFlashing around chimneys, skylights and roof penetrations\u003c\/li\u003e\n\u003cli\u003eValley and transition repairs on shingle roofs\u003c\/li\u003e\n\u003cli\u003eCounterflashing and patch work on existing roofs\u003c\/li\u003e\n\u003cli\u003eDrip and edge detailing at eaves and rakes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Roof Flashing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Width:\u003c\/strong\u003e 4 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold By:\u003c\/strong\u003e Each\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"product-specs\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSize\u003c\/th\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"ARCH Building Supply","offers":[{"title":"Default Title","offer_id":55112696070483,"sku":"AF4","price":13.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/7743\/4195\/files\/4-in-aluminum-roof-flashing-af4.webp?v=1790734516","url":"https:\/\/arch-9365.myshopify.com\/es\/products\/4-in-aluminum-roof-flashing-af4","provider":"ARCH","version":"1.0","type":"link"}