{"product_id":"atlas-gorilla-guard-30-engineered-felt-underlayment-36-x-72-4-square-roll-atlgg","title":"Atlas Gorilla Guard 30 Engineered Felt Underlayment 36\" x 72' 4 Square\/Roll","description":"\u003cp\u003eThe Atlas Gorilla Guard 30 Engineered Felt Underlayment 36\" x 72' 4 Square\/Roll is a felt underlayment for jobs that require Atlas model\/MPN 557M200 in the RL sell unit. Guard Spec 30 is a high-performance, specification-grade engineered roof underlayment for steep-slope roof applications.\u003c\/p\u003e\u003ch3\u003eKey Specs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Atlas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel \/ MPN:\u003c\/strong\u003e 557M200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e ATLGG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSell unit:\u003c\/strong\u003e RL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Felt Underlayment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize \/ color:\u003c\/strong\u003e 36\" x 72' 4 Square\/Roll\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Residential Roofing | Residential Roofing\/Underlayment | Residential Roofing\/Underlayment\/Felt Underlayment | Underlayment | Underlayment\/Felt Underlayment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage \/ unit:\u003c\/strong\u003e 4 squares (400 sq ft) per roll\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTwo-square coverage roll\u003c\/li\u003e\n\u003cli\u003e142% Stronger in Pull-Through Test\u003c\/li\u003e\n\u003cli\u003e207% Higher Tear Strength\u003c\/li\u003e\n\u003cli\u003e277% More Breaking Strength (MD)\u003c\/li\u003e\n\u003cli\u003e280% Stronger in Peel Resistance Test\u003c\/li\u003e\n\u003cli\u003e40% Lighter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCoverage \u0026amp; How Much You Need\u003c\/h3\u003e\u003cp\u003eThis item is listed as 4 squares (400 sq ft) per roll. Use the project takeoff, manufacturer installation instructions, and expected waste\/overlap to confirm the order quantity.\u003c\/p\u003e\u003ch3\u003eCompatibility \/ Fitment\u003c\/h3\u003e\u003cp\u003eUse this item only when the brand, model\/MPN, size\/color, sell unit, and system type match the project specification. Do not substitute it for a different felt underlayment, pack size, color, membrane\/system family, or installation condition without checking the manufacturer instructions.\u003c\/p\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003ch4\u003eWhat exactly am I ordering?\u003c\/h4\u003e\u003cp\u003eAtlas Gorilla Guard 30 Engineered Felt Underlayment 36\" x 72' 4 Square\/Roll, sold as RL, with SKU ATLGG and manufacturer model\/MPN 557M200.\u003c\/p\u003e\u003ch4\u003eWhat model or part number should I match?\u003c\/h4\u003e\u003cp\u003eMatch model\/MPN 557M200 and confirm the brand is Atlas. If the job spec lists a different model, size, color, or system family, hold for review.\u003c\/p\u003e\u003ch4\u003eWhat unit is the price based on?\u003c\/h4\u003e\u003cp\u003eThis listing is built around the RL sell unit. Confirm the unit before comparing price, quantity, or coverage.\u003c\/p\u003e\u003ch4\u003eHow do I estimate quantity?\u003c\/h4\u003e\u003cp\u003eUse 4 squares (400 sq ft) per roll, then add waste or overlap per the manufacturer instructions and the project design.\u003c\/p\u003e\u003ch4\u003eWhat should be checked before purchase?\u003c\/h4\u003e\u003cp\u003eConfirm the model\/MPN, sell unit, size\/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eRoofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eProduct Expert Notes\u003c\/h3\u003e\u003cp\u003eChoose this item when Atlas model\/MPN 557M200, SKU ATLGG, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.\u003c\/p\u003e","brand":"Atlas","offers":[{"title":"Default Title","offer_id":53113850364271,"sku":"ATLGG","price":98.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/ProductImage_ATLGG.jpg?v=1781509713","url":"https:\/\/superarbor.io\/products\/atlas-gorilla-guard-30-engineered-felt-underlayment-36-x-72-4-square-roll-atlgg","provider":"Super Arbor","version":"1.0","type":"link"}