{"product_id":"malarkey-401-nex-polymer-modified-self-adhering-ice-water-underlayment-2-squares-per-roll","title":"Malarkey 401 NEX Polymer Modified Self-Adhering Ice \u0026 Water Underlayment, 2 Squares per Roll","description":"\u003ch1\u003eMalarkey 401 NEX Polymer Modified Self-Adhering Ice \u0026amp; Water Underlayment, 2 Squares per Roll\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eMalarkey 401 is a polymer-modified self-adhering (SA) ice and water underlayment for steep-slope roofs, supplied in Black. Each roll provides 2 squares of coverage, protecting eaves, valleys and vulnerable roof areas beneath the finished shingles. It pairs with Malarkey shingle systems as part of a complete roof assembly.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-adhering:\u003c\/strong\u003e The SA underlayment adheres directly to the deck without mechanical fastening across the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolymer modified:\u003c\/strong\u003e Made with NEX polymer-modified asphalt technology from Malarkey Roofing Products (Holcim).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIce and water barrier:\u003c\/strong\u003e Designed as an ice and water underlayment for eaves, valleys and leak-prone areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 squares per roll:\u003c\/strong\u003e Each roll covers 2 squares (200 sq. ft.) before laps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack surface:\u003c\/strong\u003e Supplied with a black surface for use under finished shingle courses.\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\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 roll, 2 squares\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e401 NEX Polymer Modified SA Underlayment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolymer-modified asphalt self-adhering underlayment\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\u003e2 squares per roll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteep-slope roofing underlayment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIce and water underlayment for steep-slope roofs\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 covers 2 squares (200 sq. ft.) before lap deductions. For eaves protection, run the underlayment from the eave up the slope per code or manufacturer instruction; for valleys, extend it well beyond the valley centerline on each side.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eIntended for use under Malarkey steep-slope shingle systems as part of a complete roof assembly. Starter, field shingles and accessories are sold separately.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included in one order?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One roll of Malarkey 401 self-adhering ice and water underlayment, providing 2 squares of coverage.\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 Approximately 2 squares (200 sq. ft.) before lap and waste deductions.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Where should this underlayment be used?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is designed for ice and water protection at eaves, valleys and other vulnerable areas of steep-slope roofs.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Does it need fastening?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is a self-adhering membrane; follow the manufacturer's installation instructions for primer and adhesion requirements.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What color is it?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is supplied in Black.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eSelf-adhering ice and water membrane at eaves and valleys is one of the best investments against wind-driven rain and ice damming. Apply to a clean, dry deck within the manufacturer's temperature range for good adhesion, and roll it firmly to seat the lap seams. Use the 2-square roll for detail areas and order additional rolls based on the eave and valley linear footage.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSelf-adhering membranes can be slippery when the release liner is removed; wear appropriate footwear and follow fall-protection requirements during installation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Malarkey 401 NEX self-adhering ice and water underlayment rolls today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Malarkey","offers":[{"title":"Default Title","offer_id":67583082332527,"sku":"11ML4012","price":141.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/Underlayment-Mineral-Surface-SKU_2344950-primary.jpg?v=1790405639","url":"https:\/\/superarbor.io\/products\/malarkey-401-nex-polymer-modified-self-adhering-ice-water-underlayment-2-squares-per-roll","provider":"Super Arbor","version":"1.0","type":"link"}