{"product_id":"terrac-prime-acoustic-rubber-underlay-3mm-5mm-6mm-10mm","title":"Terrac® Acoustic Rubber Underlay 3mm, 5mm, 6mm or 10mm Thick","description":"\u003ch2\u003eTerrac® Prime Acoustic Rubber Underlay | Recycled SBR Rubber | 3mm \/ 5mm \/ 6mm \/ 10mm\u003c\/h2\u003e\n\u003cp\u003eTerrac® Prime is a rubber granulate underlay manufactured from recycled SBR rubber particles bonded with a cold cure polyurethane elastomer. The granulate construction — dense rubber particles held in a resilient PuR matrix — gives the product its acoustic performance: the granular structure compresses under load and absorbs impact energy before it can be transmitted into the floor assembly below, while the mass and density of the rubber layer provides resistance to airborne sound transmission through the floor.\u003c\/p\u003e\n\u003cp\u003eAt 750kg\/m³, Terrac® Prime is a high-density product relative to foam and cork underlays of equivalent thickness, and maintains its resilience under sustained compressive loads without the settlement or compression set so performance is maintained over time.\u003c\/p\u003e\n\u003cp\u003eFour thickness options are available — 3mm, 5mm, 6mm, and 10mm — each supplied on rolls of different dimensions to reflect the weight and coverage appropriate to that thickness. Thickness selection is determined by the floor covering type, the subfloor condition, the acoustic performance required by the specification, and the available floor build-up depth.\u003c\/p\u003e\n\u003cp style=\"margin: 16px 0;\"\u003e\u003cstrong\u003eJump to: \u003c\/strong\u003e\u003ca href=\"#aac-calc-anchor\"\u003eCalculator\u003c\/a\u003e · \u003ca href=\"#aac-applications\"\u003eApplications\u003c\/a\u003e · \u003ca href=\"#aac-benefits\"\u003eProduct Benefits\u003c\/a\u003e ·  \u003ca href=\"#aac-installation\"\u003eInstallation\u003c\/a\u003e · \u003ca href=\"#aac-faq\"\u003eFAQs\u003c\/a\u003e · \u003ca href=\"#aac-techspecs\"\u003eTechnical Details\u003c\/a\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n.aac-accordion{border:1px solid #ddd;border-radius:6px;margin:12px 0;overflow:hidden;}\n.aac-accordion summary{cursor:pointer;padding:14px 16px;font-weight:bold;font-size:17px;background:#f7f7f7;list-style:none;}\n.aac-accordion summary::-webkit-details-marker{display:none;}\n.aac-accordion summary:after{content:'+';float:right;font-weight:bold;}\n.aac-accordion[open] summary:after{content:'−';}\n.aac-accordion .aac-panel-body{padding:16px;border-top:1px solid #ddd;}\n.aac-card{border:2px solid #ff7a00;border-radius:8px;padding:16px;margin:16px 0;background:#fffaf5;}\n\u003c\/style\u003e\n\u003cdiv class=\"aac-card\"\u003e\n\u003ch2\u003eNeed Help Working Out Quantities?\u003c\/h2\u003e\n\u003cdiv id=\"aac-calc-ter\"\u003e\n\n  \u003ch3\u003eTerrac Rubber Underlay Calculator\u003c\/h3\u003e\n\n  \u003cinput type=\"number\" id=\"aac-length-ter\" placeholder=\"Enter Floor Length (m)\"\u003e\n  \u003cinput type=\"number\" id=\"aac-width-ter\" placeholder=\"Enter Floor Width (m)\"\u003e\n\n  \u003cbutton id=\"aac-calc-btn-ter\"\u003eCalculate\u003c\/button\u003e\n\n  \u003cdiv id=\"aac-results-ter\"\u003e\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n#aac-calc-ter {\n  max-width: 400px;\n  margin: 0 auto;\n}\n\n#aac-calc-ter input,\n#aac-calc-ter button {\n  width: 100%;\n  box-sizing: border-box;\n}\n\n#aac-calc-ter button {\n  background:#ff7a00;\n  color:#fff;\n  border:none;\n  padding:10px;\n  cursor:pointer;\n  margin-top:10px;\n}\n\n#aac-calc-ter .aac-small {\n  width:auto;\n  padding:6px 10px;\n  font-size:12px;\n  margin-left:10px;\n}\n\n.aac-subheading {\n  margin-top:20px;\n  font-weight:bold;\n  font-size:16px;\n}\n\n.aac-success {\n  color:#2e7d32;\n  font-size:12px;\n  margin-left:8px;\n  font-weight:bold;\n}\n\u003c\/style\u003e\n\n\u003cscript\u003e\n(function () {\n\n  \/\/ 🔹 TERRAC FAMILY (ALL THICKNESSES UNDER ONE HEADING)\n  const TERRAC = {\n    name: \"Terrac Rubber Underlay\",\n    options: [\n      {\n        label: \"3mm\",\n        id: 54888676622716,\n        calc: (a) =\u003e Math.ceil((a \/ 10) * 1.05)\n      },\n      {\n        label: \"5mm\",\n        id: 54888676655484,\n        calc: (a) =\u003e Math.ceil((a \/ 10) * 1.05)\n      },\n      {\n        label: \"6mm\",\n        id: 54888676688252,\n        calc: (a) =\u003e Math.ceil((a \/ 8) * 1.05)\n      },\n      {\n        label: \"10mm\",\n        id: 54888676721020,\n        calc: (a) =\u003e Math.ceil((a \/ 5) * 1.05)\n      }\n    ]\n  };\n\n  const COMPLEMENTARY = [\n    {\n      name: \"Boxes of 12x Contact Adhesive\",\n      id: 33733447090315,\n      calc: (a) =\u003e Math.ceil((a \/ 2.5) \/ 12)\n    },\n    {\n      name: \"Tubes of Everbuild AC95 Sealant\",\n      id: 33733310382219,\n      calc: (a) =\u003e Math.ceil((a \/ 6) * 1.05)\n    },\n    {\n      name: \"Rolls of PVC Jointing Tape\",\n      id: 33733337153675,\n      calc: (a) =\u003e Math.ceil(((a \/ 3.75) \/ 8) * 1.05)\n    }\n  ];\n\n  async function getPrice(id) {\n    const res = await fetch('\/variants\/' + id + '.js');\n    const data = await res.json();\n    return data.price \/ 100;\n  }\n\n  function goToCart(){\n    window.location.href = \"\/cart\";\n  }\n\n  document.getElementById(\"aac-calc-btn-ter\").addEventListener(\"click\", async function () {\n\n    const length = parseFloat(document.getElementById(\"aac-length-ter\").value);\n    const width = parseFloat(document.getElementById(\"aac-width-ter\").value);\n\n    if (!length || !width) {\n      alert(\"Enter valid dimensions\");\n      return;\n    }\n\n    const area = length * width;\n\n    let html = \"\";\n\n    \/\/ 🔹 MAIN HEADING\n    html += `\u003cdiv class=\"aac-subheading\"\u003e${TERRAC.name}\u003c\/div\u003e`;\n\n    for (let p of TERRAC.options) {\n\n      const qty = p.calc(area);\n      const price = await getPrice(p.id);\n      const total = qty * price;\n\n      html += `\n        \u003cdiv style=\"margin-bottom:10px;\"\u003e\n          ${p.label} Thickness\u003cbr\u003e\n          Qty Rqd: ${qty} (£${total.toFixed(2)})\n          \u003cbutton class=\"aac-small\" onclick=\"addToCart(${p.id}, ${qty})\"\u003e\n            Add to Cart\n          \u003c\/button\u003e\n        \u003c\/div\u003e\n      `;\n    }\n\n    \/\/ 🔹 COMPLEMENTARY PRODUCTS\n    html += `\u003cdiv class=\"aac-subheading\"\u003eComplementary Products\u003c\/div\u003e`;\n\n    for (let p of COMPLEMENTARY) {\n\n      const qty = p.calc(area);\n      const price = await getPrice(p.id);\n      const total = qty * price;\n\n      html += `\n        \u003cdiv style=\"margin-bottom:10px;\"\u003e\n          ${p.name}\u003cbr\u003e\n          Qty Rqd: ${qty} (£${total.toFixed(2)})\n          \u003cbutton class=\"aac-small\" onclick=\"addToCart(${p.id}, ${qty})\"\u003e\n            Add to Cart\n          \u003c\/button\u003e\n        \u003c\/div\u003e\n      `;\n    }\n\n    \/\/ 🔹 DISCLAIMER\n    html += `\n      \u003cdiv style=\"margin-top:15px; font-size:12px; font-style:italic; color:#666;\"\u003e\n        Quantities include a 5% allowance for waste. This calculator is intended as a guide only. \n        Advanced Acoustics accepts no responsibility for decisions made based on these results.\n      \u003c\/div\u003e\n    `;\n\n    document.getElementById(\"aac-results-ter\").innerHTML = html;\n\n  });\n\n  \/\/ 🔹 GENERIC ADD TO CART (redirects)\n  window.addToCart = function(id, qty){\n    fetch('\/cart\/add.js', {\n      method:'POST',\n      headers:{'Content-Type':'application\/json'},\n      body:JSON.stringify({\n        id: id,\n        quantity: qty\n      })\n    }).then(() =\u003e {\n      window.location.href = \"\/cart\";\n    });\n  };\n\n})();\n\u003c\/script\u003e\n\n\u003c\/div\u003e\n\u003cdetails class=\"aac-accordion\" id=\"aac-applications\" open=\"\"\u003e\n\u003csummary\u003eApplications\u003c\/summary\u003e\n\u003cdiv class=\"aac-panel-body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaminate and engineered timber floors\u003c\/strong\u003e — Terrac® Prime provides the resilient, load-bearing underlay required beneath floating floor systems while delivering significantly higher impact sound reduction than standard foam underlays. The high density and compressive strength support the floor structure under furniture and point loads without the long-term compression set that causes hollow spots and creak under foam underlays. 3mm and 5mm are the standard specifications beneath floating floors where build-up depth is limited.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStone, ceramic tile, and concrete overlays\u003c\/strong\u003e — the granulate construction is compatible with tile adhesive and thin-bed screed systems, providing a resilient intermediate layer that reduces impact transmission through hard floor finishes. Terrac® Prime is designed to prevent screed cracking by absorbing differential movement and impact stress — 6mm and 10mm are typically specified in this application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVinyl and LVT\u003c\/strong\u003e — suitable as a high-performance acoustic base for glue-down and loose-lay vinyl and LVT installations where impact noise reduction is required beyond what a foam or felt underlay provides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGym and fitness floors \u003c\/strong\u003e— the primary application for the 10mm version. Under rubber gym tiles, hardwood sprung floors, and laminate in fitness studios, commercial gyms, and home workout spaces, Terrac® Prime absorbs the shock and vibration generated by dropped weights, cardio equipment, and high-impact exercise. The rubber-to-rubber compatibility between Terrac® Prime and rubber gym tiles ensures full contact bonding without adhesive incompatibility issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderfloor heating systems\u003c\/strong\u003e — compatible with underfloor heating. The material maintains its dimensional stability and resilience through the thermal cycling of wet and electric underfloor heating systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"aac-accordion\" id=\"aac-benefits\"\u003e\n\u003csummary\u003eProduct Benefits\u003c\/summary\u003e\n\u003cdiv class=\"aac-panel-body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecycled SBR rubber — 750kg\/m³ density\u003c\/strong\u003e. Manufactured from recycled styrene-butadiene rubber granulate, Terrac® Prime converts post-industrial rubber waste into a high-density acoustic underlay. At 750kg\/m³, it is significantly denser than foam or cork underlays of equivalent thickness, providing greater resistance to sound transmission and impact energy absorption.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGranulate construction — resilience under sustained load.\u003c\/strong\u003e The PuR-bonded rubber granulate structure maintains its resilience and acoustic performance under the sustained compressive loads of furniture, fixtures, and heavy equipment. Unlike foam underlays, which compress permanently under point loads and lose acoustic performance in high-traffic areas, the granulate matrix recovers after loading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour thickness options — 3mm to 10mm.\u003c\/strong\u003e The range covers standard floating floor installations at 3mm and 5mm, tile and screed applications at 6mm, and high-impact gym and heavy-use commercial applications at 10mm. Each thickness is supplied on a roll sized for the weight and coverage appropriate to that specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlip resistance — Class X wet, Class F dry\u003c\/strong\u003e. Tested and classified for slip resistance under both wet and dry pendulum conditions, confirming safe handling and positioning during installation before the floor covering is laid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents screed cracking.\u003c\/strong\u003e The resilience of the granulate layer absorbs differential movement and impact stress within screed and tile systems, reducing the risk of surface cracking in hard floor finishes over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensionally stable — DIN 7715 Class M4\u003c\/strong\u003e. Dimensional tolerance of 1.5% ensures consistent thickness across the roll, which is critical for floating floor installations where variation in underlay thickness causes unevenness and instability in the floor covering above.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"aac-accordion\" id=\"aac-installation\"\u003e\n\u003csummary\u003eInstallation\u003c\/summary\u003e\n\u003cdiv class=\"aac-panel-body\"\u003e\n\u003cp\u003eUnroll Terrac® Prime and allow to acclimatise to room temperature before installation — cold rubber is less flexible and harder to lay flat. Cut to size using a sharp knife and straightedge. Butt all joins tightly with no gaps or overlaps. For floating floor installations, secure joins with tape to prevent movement during the floor covering installation. For tile and screed applications, confirm compatibility of the tile adhesive or screed system with the rubber substrate before proceeding. The subfloor should be clean, level, and structurally sound — surface irregularities telegraph through the underlay and into the floor covering above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"aac-accordion\" id=\"aac-faq\"\u003e\n\u003csummary\u003eFrequently Asked Questions\u003c\/summary\u003e\n\u003cdiv class=\"aac-panel-body\"\u003e\n\u003ch3\u003eI've used foam underlay before and it compressed flat under furniture — will Terrac Prime do the same?\u003c\/h3\u003e\n\u003cp\u003eNo. The rubber granulate matrix recovers after loading — unlike foam, which permanently compresses under sustained point loads and loses acoustic performance in those areas. Terrac Prime is specified for commercial and high-traffic applications precisely because it maintains its resilience and acoustic properties under furniture, equipment, and heavy foot traffic over the life of the floor.\u003c\/p\u003e\n\u003ch3\u003eMy floor fitter says standard underlay is fine — why would I specify this instead?\u003c\/h3\u003e\n\u003cp\u003eStandard foam underlay is designed primarily for cushioning and thermal insulation. Terrac Prime is manufactured to acoustic specifications — at 750kg\/m³ it is significantly denser than foam underlays of equivalent thickness and delivers measurably better impact sound reduction. If reducing noise transmitted to the floor below is a project requirement, standard foam underlay will not achieve it. Terrac Prime has tested acoustic data; standard foam underlay typically does not.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between the 3mm and 5mm versions for a floating floor?\u003c\/h3\u003e\n\u003cp\u003eBoth are appropriate for floating floor installations. The 5mm delivers better impact absorption; the 3mm is the choice where floor height is tightly constrained — at a threshold, under a door frame, or where a 2mm difference in finished floor level is a practical issue. If floor height is not a constraint, specify the 5mm.\u003c\/p\u003e\n\u003ch3\u003eDoes it need to be glued down, or can it be loose-laid?\u003c\/h3\u003e\n\u003cp\u003eFor floating floor installations — laminate, engineered timber — Terrac Prime can be loose-laid with joins taped. For tile adhesive and screed applications, confirm compatibility of the adhesive or screed system with the rubber substrate before proceeding. For glue-down LVT, bond Terrac Prime to the subfloor first using a compatible contact adhesive before installing the floor covering.\u003c\/p\u003e\n\u003ch3\u003eWhy is delivery charged on this product?\u003c\/h3\u003e\n\u003cp\u003eDue to the weight of this product, orders are shipped via a specialist freight company rather than standard parcel delivery. For larger quantities, orders may be dispatched on a pallet. If you would prefer to collect, this option is available at the payment stage — our facility is located in Mansfield, Nottinghamshire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"aac-accordion\" id=\"aac-techspecs\"\u003e\n\u003csummary\u003eThe Technical Details\u003c\/summary\u003e\n\u003cdiv class=\"aac-panel-body\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003eTerrac® Prime Acoustic Rubber Underlay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eMaterial Type\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003eRubber granulate bonded with a cold cure PuR elastomer bonding agent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eTear Strength\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e3.4-3.8 Kn\/m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eMass density kg\/m3 *DIN EN ISO 845\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e750 kg\/m3 +\/-5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eDimensional tolerance\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e1.5% DIN 7715 Class M4\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eShore A Hardness\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e56\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eElongation at break DIN EN ISO 1798\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e20-33%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eSlip Resistance\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e\n\u003cp\u003eClass X (Wet Pendulum)\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eClass F (Dry Pendulum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eProduct Weight\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e\n\u003cp\u003e3mm - 23kg\u003c\/p\u003e\n\u003cp\u003e5mm - 38kg\u003c\/p\u003e\n\u003cp\u003e6mm - 45kg\u003c\/p\u003e\n\u003cp\u003e10mm - 38kg\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eProduct Size\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e\n\u003cp\u003e3mm - 10m x 1m\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e5mm - 10m x 1m\u003c\/p\u003e\n\u003cp\u003e6mm - 8m x 1m\u003c\/p\u003e\n\u003cp\u003e10mm - 5m x 1m\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eProduct Thickness Option\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e3mm, 5mm 6mm ,10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.625%;\"\u003eArea Covered Per Roll\u003c\/td\u003e\n\u003ctd style=\"width: 59.0074%;\"\u003e\n\u003cp\u003e3mm - 10sqm\u003c\/p\u003e\n\u003cp\u003e5mm - 10sqm\u003c\/p\u003e\n\u003cp\u003e6mm - 8sqm\u003c\/p\u003e\n\u003cp\u003e10mm - 5sqm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e","brand":"Terrac","offers":[{"title":"3mm (10m x 1m)","offer_id":54888676622716,"sku":"TPARU3","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"5mm (10m x 1m)","offer_id":54888676655484,"sku":"TPARU5","price":69.99,"currency_code":"GBP","in_stock":true},{"title":"6mm (8m x 1m)","offer_id":54888676688252,"sku":"TPARU6","price":69.99,"currency_code":"GBP","in_stock":true},{"title":"10mm (5m x 1m)","offer_id":54888676721020,"sku":"TPARU10","price":68.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0381\/4483\/5723\/files\/TerracPrime.webp?v=1744807759","url":"https:\/\/www.advancedacoustics-uk.com\/products\/terrac-prime-acoustic-rubber-underlay-3mm-5mm-6mm-10mm","provider":"Advanced Acoustics","version":"1.0","type":"link"}