{"product_id":"3030-underlayment","title":"FloorMuffler 3030 Kraft Paper Underlayment \u0026 Vapor Retarder – 500 sq. ft. Roll","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.375rem] font-bold\"\u003eFloorMuffler 3030 Underlayment Paper – Breathable Moisture Barrier for Hardwood Floors\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eFloorMuffler 3030 is an engineered kraft paper underlayment that protects wood flooring from subfloor moisture the smart way — by slowing vapor without trapping it. As a breathable Class II vapor retarder, it shields your floor from moisture migrating up through the subfloor while still letting the assembly dry. It's the modern upgrade to asphalt felt and rosin paper, without the mess or the odor.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eBuilt for Nail-Down Hardwood\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis is the underlayment pros reach for under nail-down solid hardwood. Roll it out over the plywood or OSB subfloor, overlap the seams, and nail your floor right through it. The slip sheet reduces squeaks from board-on-subfloor friction and keeps dust and debris out of the assembly — clean, fast, and code-friendly.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eOne Roll, Most Installs\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e3030 isn't limited to nail-down. Use it under floating engineered hardwood and laminate as a vapor retarder, and — unlike foam underlayments — it's fully compatible with flooring that has a pre-attached pad. When your plank already has cushion built in, 3030 adds the moisture protection layer without doubling up on foam (which can void flooring warranties).\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003ePro-Grade Coverage\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eEach roll covers 500 square feet — enough to knock out most whole-floor jobs with one SKU. At 36 inches wide, it lays out fast with fewer seams than narrow felt rolls, cuts cleanly with a utility knife, and weighs a fraction of asphalt paper.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhere it works best:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNail-down solid hardwood over plywood or OSB\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFloating engineered hardwood and laminate floors\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFlooring with pre-attached underlayment pad (moisture layer only)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWhole-home and multi-room residential or commercial projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e Not for use with radiant heat systems. Over concrete slabs or in basements, use an underlayment with a full moisture barrier such as our \u003ca href=\"https:\/\/www.builddirect.com\/products\/fanfold-underlayment\" title=\"FanFold XPS Flooring Underlayment\"\u003eFanFold XPS Flooring Underlayment\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBacked by a 25-year residential and commercial warranty.\u003c\/p\u003e","brand":"BuildDirect","offers":[{"title":"3030 Underlayment","offer_id":45481160048937,"sku":"15215731","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/4289\/9753\/files\/15215731-00-pdp.jpg?v=1689132831","url":"https:\/\/www.builddirect.com\/fr\/products\/3030-underlayment","provider":"BuildDirect","version":"1.0","type":"link"}