{"title":"Crack Isolation","description":"\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Choose a cork underlayment. They are a great choice to help eliminate cracks in the substrate from transferring through to ceramic or natural stone finished flooring materials.\u003c\/p\u003e\n\u003cp\u003eCork is an excellent crack isolation material for flooring installations because its natural, honeycomb cellular structure acts as a flexible, shock-absorbing membrane. It allows the subfloor—such as concrete—to expand and contract naturally without transferring that stress, which prevents cracks in rigid materials like tile, stone, and hardwood.\u003c\/p\u003e\n\u003cp\u003eIf you are installing ceramic tile, stone, marble, glued wood flooring, or a floating floor system, QEP \u003ca href=\"\/collections\/crack-isolation?filter.vendor=QEP\u0026amp;filter.mf_details_format=Roll\"\u003eNatural Cork Underlayment Roll\u003c\/a\u003e and \u003ca href=\"\/products\/72005q\/qep-natural-cork-underlayment-sheets-6-mm-30-sq-ft-5-sheets\"\u003eNatural Cork Underlayment Sheets\u003c\/a\u003e are great choices. They act as a crack isolation membrane, resisting the transfer of stress cracks up to 1\/8\" from subfloor through to flooring surfaces – plus it is naturally antimicrobial, as well as mold and mildew resistant.\u003c\/p\u003e\n\u003cp\u003eFor both glue-down and loose lay configurations, Capitol Premium \u003ca href=\"\/products\/110650\/capitol-premium-natural-cork-underlayment-roll-6-mm-100-s-f-4-ft-x-25-ft\"\u003eCork Underlayment Rolls\u003c\/a\u003e and Premium \u003ca href=\"\/products\/110622\/capitol-premium-cork-underlayment-sheets-6-mm-150-sq-ft-2-ft-x-3-ft\"\u003eCork Underlayment Sheets\u003c\/a\u003e, or ROBERTS \u003ca href=\"\/products\/70-175\/roberts-natural-cork-underlayment-sheets-6-mm-300-sq-ft-50-sheets\"\u003e6 mm Cork Underlayment Sheets\u003c\/a\u003e are the best protection for your floor against stress cracks transferring from the subfloor to flooring surfaces, and to reduce thermal transmission, making it ideal for environments with radiant heat systems.\u003c\/p\u003e\n\u003cp\u003eKeep in mind that all-natural cork underlayment is naturally hypoallergenic, environmentally-friendly, and contributes to a healthier indoor air quality.\u003c\/p\u003e","products":[{"product_id":"72005q","title":"Natural Cork Underlayment Sheets - 6 mm - 30 sq. ft. (5 sheets)","description":"QEP's Natural Cork Underlayment is an outstanding sound barrier for all types of flooring. Besides being an environmentally friendly option, cork is also a healthy choice. It's naturally hypoallergenic, as well as mold and mildew resistant. Natural Cork Underlayment reduces sound transmission and helps protect flooring from the transfer of subfloor stress cracks. It also reduces thermal transmission, making it ideal for use with radiant heat systems. QEP Natural Cork products are FloorScore Certified for healthier indoor air quality may contribute towards satisfying credits under the LEED Green Building Program.","brand":"QEP","offers":[{"title":"Default Title","offer_id":48906008723675,"sku":"72005Q","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/QEP_72005Q_Natural-Cork-Underlayment-Sheets-6-mm-30-sq-ft-5-sheets_1_ir7f3pxcltao_20260623.jpg?v=1782401888"},{"product_id":"70-175","title":"Natural Cork Underlayment Sheets - 6 mm - 300 sq. ft. (50 sheets)","description":"ROBERTS Natural Cork Underlayment is an outstanding sound barrier for all types of flooring. It reduces sound transmission, and helps to protect the floor against the transfer of stress cracks from the subfloor through to flooring surfaces. It also reduces thermal transmission, making it ideal for use with radiant heat systems. Easy to install in both glue-down and loose lay configurations, it is naturally hypoallergenic, mold and mildew resistant. ROBERTS Natural Cork products are FloorScore Certified for healthier indoor air quality and may contribute towards satisfying credits under the LEED Green Building Program. Contains 50 sheets measuring 2 ft. x 3 ft. x 6 mm for a total of 300 sq. ft. coverage.","brand":"ROBERTS","offers":[{"title":"Default Title","offer_id":48906014982363,"sku":"70-175","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/ROBERTS_70-175_Natural-Cork-Underlayment-Sheets-6-mm-300-sq-ft-50-sheets_1_uit5jmjklmnh_20260623.jpg?v=1782401888"},{"product_id":"72003q","title":"Natural Cork Underlayment Roll - 6 mm - 100 sq. ft. (4' x 25')","description":"QEP's Natural Cork Underlayment is an outstanding sound barrier for all types of flooring. Besides being an environmentally friendly option, cork is also a healthy choice. It's naturally hypoallergenic, as well as mold and mildew resistant. Natural Cork Underlayment reduces sound transmission and helps protect flooring from the transfer of subfloor stress cracks. It also reduces thermal transmission, making it ideal for use with radiant heat systems. QEP Natural Cork products are FloorScore Certified for healthier indoor air quality and may contribute towards satisfying credits under the LEED Green Building Program.","brand":"QEP","offers":[{"title":"Default Title","offer_id":48906018947291,"sku":"72003Q","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/QEP_72003Q_Natural-Cork-Underlayment-Roll-6-mm-100-sq-ft-4-ft-x-25-ft_1_yar8vjihwiet_20260623.jpg?v=1782401888"},{"product_id":"72008q","title":"Natural Cork Underlayment Roll - 3 mm - 200 sq. ft. (4' x 50')","description":"QEP's Natural Cork Underlayment is an outstanding sound barrier for all types of flooring. Besides being an environmentally friendly option, cork is also a healthy choice. It's naturally hypoallergenic, as well as mold and mildew resistant. Natural Cork Underlayment reduces sound transmission and helps protect flooring form the transfer of subfloor stress cracks. It also reduces thermal transmission, making it ideal for use with radiant heat systems. QEP Natural Cork products are FloorScore Certified for healthier indoor air quality and may contribute towards satisfying credits under the LEED Green Building Program.","brand":"QEP","offers":[{"title":"Default Title","offer_id":48906020978907,"sku":"72008Q","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/QEP_72008Q_Natural-Cork-Underlayment-Roll-3-mm-200-sq-ft-4-ft-x-50-ft_1_jgouromdmlih_20260623.jpg?v=1782401888"},{"product_id":"110622","title":"Premium Cork Underlayment Sheets - 6 mm - 150 sq. ft. (2' x 3')","description":"Capitol® Premium Cork Underlayment Sheets are designed for use with ceramic tile, stone, marble, glued wood flooring and floating floor systems.  This Natural Cork Underlayment  protects your floor against stress cracks transferring from the subfloor to flooring surfaces, and reduces thermal transmission, making it ideal for radiant flooring. It reduces sound transmission and makes an excellent sound barrier for all flooring types. Naturally hypoallergenic, this environmentally-friendly cork underlayment contributes to a healthier indoor air quality. Capitol® Premium Cork Underlayment Sheets may contribute towards satisfying credits under the LEED Green Building Program.","brand":"Capitol","offers":[{"title":"Default Title","offer_id":48906024452315,"sku":"110622","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/Capitol_110622_Premium-Cork-Underlayment-Sheets-6-mm-150-sq-ft-2-ft-x-3-ft_1_zqxkbx2mepsj_20260623.jpg?v=1782401887"},{"product_id":"110650","title":"Premium Natural Cork Underlayment Roll - 6 mm - 100 s.f. (4' x 25')","description":"This Natural Cork Underlayment  protects your floor against stress cracks transferring from the subfloor to flooring surfaces, and reduces thermal transmission, making it ideal for radiant flooring. It reduces sound transmission and makes an excellent sound barrier for all flooring types. Naturally hypoallergenic, this environmentally-friendly cork underlayment contributes to a healthier indoor air quality. Capitol Premium Cork Underlayment Rolls may contribute towards satisfying credits under the LEED Green Building Program.","brand":"Capitol","offers":[{"title":"Default Title","offer_id":48906026418395,"sku":"110650","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/files\/Capitol_110650_Premium-Natural-Cork-Underlayment-Roll-6-mm-100-sf-4-ft-x-25-ft_1_cgvvpafio2dl_20260623.jpg?v=1782401888"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/4066\/3515\/collections\/Crack-Isolation_2500x651px.jpg?v=1781821736","url":"https:\/\/www.qep.com\/collections\/crack-isolation.oembed","provider":"shopQEP.com","version":"1.0","type":"link"}