{"product_id":"superglass-multi-roll-44-loft-insulation","title":"Superglass Multi-Roll 44 Glass Mineral Wool Loft Insulation","description":"\u003ch1 data-start=\"148\" data-end=\"448\" class=\"PDq2pG_selectionAnchorContainer\"\u003eSuperglass Multi-Roll 44\u003c\/h1\u003e\n\u003cp data-start=\"148\" data-end=\"448\" class=\"PDq2pG_selectionAnchorContainer\"\u003eis a non-combustible glass mineral wool roll made for insulating cold lofts at ceiling level. It is laid between timber ceiling joists and then across the joists as a second layer, reducing heat loss through the roof while limiting the thermal bridging created by the timber.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"450\" data-end=\"946\"\u003eThe roll is partially perforated, allowing it to be divided into narrower sections for common joist spacings or left at full width for the upper layer. This reduces cutting, speeds up installation and makes better use of each roll. Superglass Multi-Roll 44 has a declared thermal conductivity of \u003cstrong data-start=\"746\" data-end=\"760\"\u003e0.044 W\/mK\u003c\/strong\u003e and a \u003cstrong data-start=\"767\" data-end=\"783\"\u003eEuroclass A1\u003c\/strong\u003e reaction-to-fire classification. Superglass also states that the product is manufactured using up to \u003cstrong data-start=\"885\" data-end=\"907\"\u003e84% recycled glass\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"948\" data-end=\"970\" data-section-id=\"tz4eci\"\u003eProduct Information\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"972\" data-end=\"1640\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"972\" data-end=\"998\"\u003e\n\u003ctr data-start=\"972\" data-end=\"998\"\u003e\n\u003cth data-start=\"972\" data-end=\"988\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"988\" data-end=\"998\" data-col-size=\"md\" class=\"last:pe-10\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1009\" data-end=\"1640\"\u003e\n\u003ctr data-start=\"1009\" data-end=\"1038\"\u003e\n\u003ctd data-start=\"1009\" data-end=\"1024\" data-col-size=\"sm\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1024\" data-end=\"1038\"\u003eSuperglass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1039\" data-end=\"1066\"\u003e\n\u003ctd data-start=\"1039\" data-end=\"1049\" data-col-size=\"sm\"\u003eProduct\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1049\" data-end=\"1066\"\u003eMulti-Roll 44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1067\" data-end=\"1125\"\u003e\n\u003ctd data-start=\"1067\" data-end=\"1082\" data-col-size=\"sm\"\u003eProduct type\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1082\" data-end=\"1125\"\u003eGlass mineral wool loft insulation roll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1126\" data-end=\"1159\"\u003e\n\u003ctd data-start=\"1126\" data-end=\"1137\" data-col-size=\"sm\"\u003eMaterial\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1137\" data-end=\"1159\"\u003eGlass mineral wool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1160\" data-end=\"1227\"\u003e\n\u003ctd data-start=\"1160\" data-end=\"1179\" data-col-size=\"sm\"\u003eMain application\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1179\" data-end=\"1227\"\u003eBetween and over timber joists in cold lofts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1228\" data-end=\"1269\"\u003e\n\u003ctd data-start=\"1228\" data-end=\"1251\" data-col-size=\"sm\"\u003eThermal conductivity\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1251\" data-end=\"1269\"\u003e\u003cstrong data-start=\"1253\" data-end=\"1267\"\u003e0.044 W\/mK\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1270\" data-end=\"1309\"\u003e\n\u003ctd data-start=\"1270\" data-end=\"1289\" data-col-size=\"sm\"\u003eReaction to fire\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1289\" data-end=\"1309\"\u003e\u003cstrong data-start=\"1291\" data-end=\"1307\"\u003eEuroclass A1\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1310\" data-end=\"1352\"\u003e\n\u003ctd data-start=\"1310\" data-end=\"1321\" data-col-size=\"sm\"\u003eStandard\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1321\" data-end=\"1352\"\u003eManufactured to BS EN 13162\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1353\" data-end=\"1373\"\u003e\n\u003ctd data-start=\"1353\" data-end=\"1362\" data-col-size=\"sm\"\u003eFacing\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1362\" data-end=\"1373\"\u003eUnfaced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1374\" data-end=\"1437\"\u003e\n\u003ctd data-start=\"1374\" data-end=\"1389\" data-col-size=\"sm\"\u003ePerforations\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1389\" data-end=\"1437\"\u003ePartially perforated for common joist widths\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1438\" data-end=\"1487\"\u003e\n\u003ctd data-start=\"1438\" data-end=\"1459\" data-col-size=\"sm\"\u003eVapour resistivity\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1459\" data-end=\"1487\"\u003eNominally \u003cstrong data-start=\"1471\" data-end=\"1485\"\u003e5 MN·s\/g·m\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1488\" data-end=\"1539\"\u003e\n\u003ctd data-start=\"1488\" data-end=\"1507\" data-col-size=\"sm\"\u003eRecycled content\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1507\" data-end=\"1539\"\u003eUp to \u003cstrong data-start=\"1515\" data-end=\"1537\"\u003e84% recycled glass\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1540\" data-end=\"1592\"\u003e\n\u003ctd data-start=\"1540\" data-end=\"1558\" data-col-size=\"sm\"\u003eCCPI assessment\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1558\" data-end=\"1592\"\u003eCertificate \u003cstrong data-start=\"1572\" data-end=\"1590\"\u003e005800129\/0227\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"1593\" data-end=\"1640\"\u003e\n\u003ctd data-start=\"1593\" data-end=\"1608\" data-col-size=\"sm\"\u003eSelling unit\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"1608\" data-end=\"1640\"\u003eOne compressed roll per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"1642\" data-end=\"1907\"\u003eSuperglass confirms the thermal conductivity, Euroclass A1 fire rating, loft application and CCPI assessment. The current manufacturer and specification sources also record nominal vapour resistivity and recycled-glass content. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"1909\" data-end=\"1955\" data-section-id=\"1x8ro97\"\u003eSizes, Pack Coverage and Thermal Resistance\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1957\" data-end=\"2341\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1957\" data-end=\"2037\"\u003e\n\u003ctr data-start=\"1957\" data-end=\"2037\"\u003e\n\u003cth data-start=\"1957\" data-end=\"1969\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eThickness\u003c\/th\u003e\n\u003cth data-start=\"1969\" data-end=\"1987\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eRoll dimensions\u003c\/th\u003e\n\u003cth data-start=\"1987\" data-end=\"2003\" data-col-size=\"sm\" class=\"last:pe-10\"\u003ePack quantity\u003c\/th\u003e\n\u003cth data-start=\"2003\" data-end=\"2014\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eCoverage\u003c\/th\u003e\n\u003cth data-start=\"2014\" data-end=\"2037\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eApproximate R-value\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2065\" data-end=\"2341\"\u003e\n\u003ctr data-start=\"2065\" data-end=\"2134\"\u003e\n\u003ctd data-start=\"2065\" data-end=\"2077\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2067\" data-end=\"2076\"\u003e100mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2077\" data-end=\"2094\"\u003e10.10m × 1.20m\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2094\" data-end=\"2103\"\u003e1 roll\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2103\" data-end=\"2117\"\u003e\u003cstrong data-start=\"2105\" data-end=\"2116\"\u003e12.12m²\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2117\" data-end=\"2134\"\u003e\u003cstrong data-start=\"2119\" data-end=\"2132\"\u003e2.27m²K\/W\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2135\" data-end=\"2203\"\u003e\n\u003ctd data-start=\"2135\" data-end=\"2147\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2137\" data-end=\"2146\"\u003e150mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2147\" data-end=\"2163\"\u003e6.65m × 1.16m\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2163\" data-end=\"2172\"\u003e1 roll\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2172\" data-end=\"2186\"\u003e\u003cstrong data-start=\"2174\" data-end=\"2185\"\u003e7.714m²\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2186\" data-end=\"2203\"\u003e\u003cstrong data-start=\"2188\" data-end=\"2201\"\u003e3.41m²K\/W\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2204\" data-end=\"2272\"\u003e\n\u003ctd data-start=\"2204\" data-end=\"2216\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2206\" data-end=\"2215\"\u003e170mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2216\" data-end=\"2232\"\u003e5.80m × 1.16m\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2232\" data-end=\"2241\"\u003e1 roll\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2241\" data-end=\"2255\"\u003e\u003cstrong data-start=\"2243\" data-end=\"2254\"\u003e6.728m²\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2255\" data-end=\"2272\"\u003e\u003cstrong data-start=\"2257\" data-end=\"2270\"\u003e3.86m²K\/W\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2273\" data-end=\"2341\"\u003e\n\u003ctd data-start=\"2273\" data-end=\"2285\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2275\" data-end=\"2284\"\u003e200mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2285\" data-end=\"2301\"\u003e4.85m × 1.16m\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2301\" data-end=\"2310\"\u003e1 roll\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2310\" data-end=\"2324\"\u003e\u003cstrong data-start=\"2312\" data-end=\"2323\"\u003e5.626m²\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2324\" data-end=\"2341\"\u003e\u003cstrong data-start=\"2326\" data-end=\"2339\"\u003e4.55m²K\/W\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"2343\" data-end=\"2521\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"2523\" data-end=\"2623\"\u003e\u003cem data-start=\"2523\" data-end=\"2623\"\u003eR-values are calculated from thickness divided by the declared thermal conductivity of 0.044 W\/mK.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"2625\" data-end=\"2640\" data-section-id=\"1ma7m6t\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"2642\" data-end=\"3152\"\u003e\n\u003cli data-start=\"2642\" data-end=\"2715\" data-section-id=\"1i2yj7r\"\u003eMade specifically for insulation between and over timber ceiling joists\u003c\/li\u003e\n\u003cli data-start=\"2716\" data-end=\"2770\" data-section-id=\"1qiwgnx\"\u003ePartially perforated to reduce measuring and cutting\u003c\/li\u003e\n\u003cli data-start=\"2771\" data-end=\"2832\" data-section-id=\"fscydi\"\u003eCan be installed at full width across the top of the joists\u003c\/li\u003e\n\u003cli data-start=\"2833\" data-end=\"2882\" data-section-id=\"cpeaft\"\u003eDeclared thermal conductivity of \u003cstrong data-start=\"2868\" data-end=\"2882\"\u003e0.044 W\/mK\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2883\" data-end=\"2917\" data-section-id=\"1pnscq2\"\u003e\u003cstrong data-start=\"2885\" data-end=\"2917\"\u003eEuroclass A1 non-combustible\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"2918\" data-end=\"2981\" data-section-id=\"6za5dq\"\u003eLightweight and easier to handle than rigid insulation boards\u003c\/li\u003e\n\u003cli data-start=\"2982\" data-end=\"3045\" data-section-id=\"16l4g2z\"\u003eFlexible fibres fit around small irregularities in the timber\u003c\/li\u003e\n\u003cli data-start=\"3046\" data-end=\"3087\" data-section-id=\"1m9id9\"\u003eMade using up to \u003cstrong data-start=\"3065\" data-end=\"3087\"\u003e84% recycled glass\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3088\" data-end=\"3152\" data-section-id=\"30iojr\"\u003eUseful for new loft insulation and topping up older insulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"3154\" data-end=\"3189\" data-section-id=\"1urmk7g\"\u003eWhich Thickness Should I Choose?\u003c\/h2\u003e\n\u003ch3 data-start=\"3191\" data-end=\"3200\" data-section-id=\"6p06s7\"\u003e100mm\u003c\/h3\u003e\n\u003cp data-start=\"3202\" data-end=\"3345\"\u003eNormally used as the first layer between ceiling joists where the joist depth allows it. It can also be used as part of a multi-layer build-up.\u003c\/p\u003e\n\u003ch3 data-start=\"3347\" data-end=\"3356\" data-section-id=\"6ouuk2\"\u003e150mm\u003c\/h3\u003e\n\u003cp data-start=\"3358\" data-end=\"3469\"\u003eA useful upper layer where the first layer is already in place and another 150mm is required across the joists.\u003c\/p\u003e\n\u003ch3 data-start=\"3471\" data-end=\"3480\" data-section-id=\"6otb74\"\u003e170mm\u003c\/h3\u003e\n\u003cp data-start=\"3482\" data-end=\"3596\"\u003eCommonly chosen as a cross-laid top layer over 100mm insulation to create an overall depth of approximately 270mm.\u003c\/p\u003e\n\u003ch3 data-start=\"3598\" data-end=\"3607\" data-section-id=\"6lil90\"\u003e200mm\u003c\/h3\u003e\n\u003cp data-start=\"3609\" data-end=\"3785\"\u003eThe deepest option on this listing. It is useful where a substantial top-up is needed and there is enough room above the joists without restricting eaves ventilation or access.\u003c\/p\u003e\n\u003cp data-start=\"3787\" data-end=\"3970\"\u003eThe correct total insulation depth should come from the project specification or thermal calculation. The roll thickness alone does not represent the U-value of the completed ceiling.\u003c\/p\u003e\n\u003ch2 data-start=\"3972\" data-end=\"3986\" data-section-id=\"15olgqg\"\u003eCommon Uses\u003c\/h2\u003e\n\u003cul data-start=\"3988\" data-end=\"4259\"\u003e\n\u003cli data-start=\"3988\" data-end=\"4014\" data-section-id=\"ofwe4c\"\u003eNew cold-loft insulation\u003c\/li\u003e\n\u003cli data-start=\"4015\" data-end=\"4052\" data-section-id=\"82gltw\"\u003eTopping up existing loft insulation\u003c\/li\u003e\n\u003cli data-start=\"4053\" data-end=\"4095\" data-section-id=\"1s9mydo\"\u003eInsulation between timber ceiling joists\u003c\/li\u003e\n\u003cli data-start=\"4096\" data-end=\"4139\" data-section-id=\"1cg7wx5\"\u003eCross-laid insulation above timber joists\u003c\/li\u003e\n\u003cli data-start=\"4140\" data-end=\"4187\" data-section-id=\"14mr785\"\u003eCold pitched roofs insulated at ceiling level\u003c\/li\u003e\n\u003cli data-start=\"4188\" data-end=\"4235\" data-section-id=\"1yusy7a\"\u003eDomestic refurbishment and extension projects\u003c\/li\u003e\n\u003cli data-start=\"4236\" data-end=\"4259\" data-section-id=\"17duvf9\"\u003eNew-build loft floors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4261\" data-end=\"4468\"\u003eThis product is primarily a \u003cstrong data-start=\"4289\" data-end=\"4313\"\u003eloft insulation roll\u003c\/strong\u003e. For internal stud walls, separating floors or soundproofing systems, use an acoustic partition roll or mineral wool slab designed for those applications.\u003c\/p\u003e\n\u003ch2 data-start=\"4470\" data-end=\"4494\" data-section-id=\"1fajzlb\"\u003eInstallation Guidance\u003c\/h2\u003e\n\u003col data-start=\"4496\" data-end=\"5440\"\u003e\n\u003cli data-start=\"4496\" data-end=\"4598\" data-section-id=\"1wg5fl1\"\u003eCheck that the loft floor is dry and that any existing insulation is clean and in usable condition.\u003c\/li\u003e\n\u003cli data-start=\"4599\" data-end=\"4718\" data-section-id=\"ipfr5h\"\u003eRemove stored items and identify cables, pipework, water tanks, downlights and ventilation openings before starting.\u003c\/li\u003e\n\u003cli data-start=\"4719\" data-end=\"4772\" data-section-id=\"sdgtpd\"\u003eAllow the compressed roll to expand after opening.\u003c\/li\u003e\n\u003cli data-start=\"4773\" data-end=\"4869\" data-section-id=\"60pfd0\"\u003eFit the first layer between the ceiling joists without forcing or compressing the insulation.\u003c\/li\u003e\n\u003cli data-start=\"4870\" data-end=\"4967\" data-section-id=\"zqz84w\"\u003eLay the second layer at right angles across the joists to reduce heat loss through the timber.\u003c\/li\u003e\n\u003cli data-start=\"4968\" data-end=\"5027\" data-section-id=\"2lwc7w\"\u003eButt adjoining rolls together without leaving open gaps.\u003c\/li\u003e\n\u003cli data-start=\"5028\" data-end=\"5085\" data-section-id=\"15zwxwv\"\u003eKeep the insulation clear of eaves ventilation routes.\u003c\/li\u003e\n\u003cli data-start=\"5086\" data-end=\"5213\" data-section-id=\"1vwvztk\"\u003eFollow the light manufacturer’s clearance instructions around recessed downlights, transformers and heat-producing fittings.\u003c\/li\u003e\n\u003cli data-start=\"5214\" data-end=\"5308\" data-section-id=\"rgmihl\"\u003eUse raised loft legs or a purpose-made raised deck if the area will be boarded for storage.\u003c\/li\u003e\n\u003cli data-start=\"5309\" data-end=\"5440\" data-section-id=\"1lhoib0\"\u003eDo not place standard loft boards directly on top of the insulation, as this compresses the roll and reduces its effectiveness.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 data-start=\"5442\" data-end=\"5460\" data-section-id=\"1ptsrlw\"\u003eTips and Tricks\u003c\/h2\u003e\n\u003cul data-start=\"5462\" data-end=\"6215\"\u003e\n\u003cli data-start=\"5462\" data-end=\"5536\" data-section-id=\"gdz4z9\"\u003eMeasure the \u003cstrong data-start=\"5476\" data-end=\"5502\"\u003eactual loft floor area\u003c\/strong\u003e, not the outside roof dimensions.\u003c\/li\u003e\n\u003cli data-start=\"5537\" data-end=\"5628\" data-section-id=\"ms14eg\"\u003eDeduct large openings but allow approximately \u003cstrong data-start=\"5585\" data-end=\"5597\"\u003e5% extra\u003c\/strong\u003e for cuts and awkward sections.\u003c\/li\u003e\n\u003cli data-start=\"5629\" data-end=\"5778\" data-section-id=\"1y4dqae\"\u003eA 100mm layer between joists followed by a deeper cross-laid roll is usually easier to fit neatly than forcing one thick roll into the joist space.\u003c\/li\u003e\n\u003cli data-start=\"5779\" data-end=\"5853\" data-section-id=\"ez8f5z\"\u003eCut mineral wool using a long insulation knife against a straight board.\u003c\/li\u003e\n\u003cli data-start=\"5854\" data-end=\"5953\" data-section-id=\"dluvwc\"\u003eCompress the roll only while making the cut; allow the insulation to recover before installation.\u003c\/li\u003e\n\u003cli data-start=\"5954\" data-end=\"6036\" data-section-id=\"1fjx5im\"\u003eInsulate and draught-seal the loft hatch rather than leaving it as a weak point.\u003c\/li\u003e\n\u003cli data-start=\"6037\" data-end=\"6165\" data-section-id=\"1q09a8g\"\u003eKeep cold-water tanks and pipework correctly insulated where the loft becomes colder after the ceiling insulation is upgraded.\u003c\/li\u003e\n\u003cli data-start=\"6166\" data-end=\"6215\" data-section-id=\"1iwdk0\"\u003eDo not block soffit, tile or eaves ventilation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"6217\" data-end=\"6244\" data-section-id=\"uivmt5\"\u003eCommon Mistakes to Avoid\u003c\/h2\u003e\n\u003cul data-start=\"6246\" data-end=\"6737\"\u003e\n\u003cli data-start=\"6246\" data-end=\"6303\" data-section-id=\"12ufz96\"\u003eCompressing the insulation beneath ordinary loft boards\u003c\/li\u003e\n\u003cli data-start=\"6304\" data-end=\"6348\" data-section-id=\"9u2fgs\"\u003eBlocking the ventilation path at the eaves\u003c\/li\u003e\n\u003cli data-start=\"6349\" data-end=\"6377\" data-section-id=\"fdjdqv\"\u003eLeaving gaps between rolls\u003c\/li\u003e\n\u003cli data-start=\"6378\" data-end=\"6445\" data-section-id=\"ehgoyd\"\u003eFitting 150mm, 170mm or 200mm insulation into a 100mm joist space\u003c\/li\u003e\n\u003cli data-start=\"6446\" data-end=\"6529\" data-section-id=\"m2xg41\"\u003eCovering recessed lights without checking their insulation-clearance requirements\u003c\/li\u003e\n\u003cli data-start=\"6530\" data-end=\"6599\" data-section-id=\"190zujm\"\u003eAssuming the loft hatch does not need insulation or draught sealing\u003c\/li\u003e\n\u003cli data-start=\"6600\" data-end=\"6674\" data-section-id=\"8vpc7h\"\u003eUsing Multi-Roll 44 as a substitute for acoustic partition roll in walls\u003c\/li\u003e\n\u003cli data-start=\"6675\" data-end=\"6737\" data-section-id=\"1rcciek\"\u003eWalking directly on plasterboard ceilings between the joists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"6739\" data-end=\"6767\" data-section-id=\"hkd5a4\"\u003eFrequently Asked Questions\u003c\/h1\u003e\n\u003ch3 data-start=\"6769\" data-end=\"6833\" data-section-id=\"12j4e0s\"\u003eIs Superglass Multi-Roll 44 sold by the roll or by the pack?\u003c\/h3\u003e\n\u003cp data-start=\"6835\" data-end=\"6946\"\u003eEach pack contains \u003cstrong data-start=\"6854\" data-end=\"6877\"\u003eone compressed roll\u003c\/strong\u003e. The length and coverage change according to the selected thickness.\u003c\/p\u003e\n\u003ch3 data-start=\"6948\" data-end=\"6995\" data-section-id=\"1ec62zt\"\u003eCan I lay it over existing loft insulation?\u003c\/h3\u003e\n\u003cp data-start=\"6997\" data-end=\"7140\"\u003eYes, provided the existing insulation is dry, clean and not severely compressed or damaged. Lay the new layer across the joists where possible.\u003c\/p\u003e\n\u003ch3 data-start=\"7142\" data-end=\"7192\" data-section-id=\"l2id0z\"\u003eCan the roll be divided to fit between joists?\u003c\/h3\u003e\n\u003cp data-start=\"7194\" data-end=\"7360\"\u003eYes. It is partially perforated so it can be split for common joist widths or retained at full width for laying over the joists. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"7362\" data-end=\"7417\" data-section-id=\"109xcok\"\u003eCan I compress 170mm insulation into a 100mm space?\u003c\/h3\u003e\n\u003cp data-start=\"7419\" data-end=\"7545\"\u003eNo. Use insulation matching the available joist depth and add the remaining insulation as a cross-laid layer above the joists.\u003c\/p\u003e\n\u003ch3 data-start=\"7547\" data-end=\"7573\" data-section-id=\"1xoe68f\"\u003eIs it non-combustible?\u003c\/h3\u003e\n\u003cp data-start=\"7575\" data-end=\"7698\"\u003eYes. Superglass Multi-Roll 44 has a \u003cstrong data-start=\"7611\" data-end=\"7627\"\u003eEuroclass A1\u003c\/strong\u003e reaction-to-fire classification. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"7700\" data-end=\"7741\" data-section-id=\"j7ymrq\"\u003eCan I board over it for loft storage?\u003c\/h3\u003e\n\u003cp data-start=\"7743\" data-end=\"7881\"\u003eYes, but the storage deck must be raised so the insulation retains its full thickness. Use suitable loft legs or a raised structural deck.\u003c\/p\u003e\n\u003ch3 data-start=\"7883\" data-end=\"7918\" data-section-id=\"1oorgkn\"\u003eCan I use it in internal walls?\u003c\/h3\u003e\n\u003cp data-start=\"7920\" data-end=\"8122\"\u003eMulti-Roll 44 is made for cold lofts. For internal walls, use a product such as \u003cstrong data-start=\"8000\" data-end=\"8019\"\u003eIsover APR 1200\u003c\/strong\u003e, \u003cstrong data-start=\"8021\" data-end=\"8044\"\u003eKnauf Acoustic Roll\u003c\/strong\u003e, \u003cstrong data-start=\"8046\" data-end=\"8064\"\u003eROCKWOOL RWA45\u003c\/strong\u003e or \u003cstrong data-start=\"8068\" data-end=\"8084\"\u003eROCKWOOL RW3\u003c\/strong\u003e, depending on the wall specification.\u003c\/p\u003e\n\u003ch3 data-start=\"8124\" data-end=\"8161\" data-section-id=\"1b7khg0\"\u003eDoes it improve sound insulation?\u003c\/h3\u003e\n\u003cp data-start=\"8163\" data-end=\"8438\"\u003eGlass mineral wool absorbs sound within a cavity, but Multi-Roll 44 is primarily sold as thermal loft insulation. For a ceiling soundproofing system, use an acoustic-grade mineral wool product with resilient bars or acoustic clips, acoustic plasterboard and acoustic sealant.\u003c\/p\u003e\n\u003ch3 data-start=\"8440\" data-end=\"8469\" data-section-id=\"ha4q6s\"\u003eHow many rolls do I need?\u003c\/h3\u003e\n\u003cp data-start=\"8471\" data-end=\"8570\"\u003eDivide the loft area by the coverage of the selected roll, then round up to the next complete roll.\u003c\/p\u003e\n\u003cp data-start=\"8572\" data-end=\"8608\"\u003eExample for a 50m² loft using 170mm:\u003c\/p\u003e\n\u003cp data-start=\"8610\" data-end=\"8641\"\u003e\u003cstrong data-start=\"8610\" data-end=\"8641\"\u003e50m² ÷ 6.728m² = 7.43 rolls\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"8643\" data-end=\"8670\"\u003eYou would need \u003cstrong data-start=\"8658\" data-end=\"8669\"\u003e8 rolls\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 data-start=\"8752\" data-end=\"8793\" data-section-id=\"11h2c5s\"\u003eFor a Standard Loft Insulation Project\u003c\/h2\u003e\n\u003cul data-start=\"8795\" data-end=\"9369\"\u003e\n\u003cli data-start=\"8795\" data-end=\"8865\" data-section-id=\"11fap2x\"\u003e\n\u003cstrong data-start=\"8797\" data-end=\"8817\"\u003eInsulation Knife\u003c\/strong\u003e – for clean cuts around joists and roof timbers\u003c\/li\u003e\n\u003cli data-start=\"8866\" data-end=\"8942\" data-section-id=\"z49fc2\"\u003e\n\u003cstrong data-start=\"8868\" data-end=\"8881\"\u003eLoft Legs\u003c\/strong\u003e – raises the storage deck without compressing the insulation\u003c\/li\u003e\n\u003cli data-start=\"8943\" data-end=\"9015\" data-section-id=\"1inx7zp\"\u003e\n\u003cstrong data-start=\"8945\" data-end=\"8981\"\u003eOSB3 or Flooring-Grade Chipboard\u003c\/strong\u003e – creates the raised storage deck\u003c\/li\u003e\n\u003cli data-start=\"9016\" data-end=\"9087\" data-section-id=\"1oipoqw\"\u003e\n\u003cstrong data-start=\"9018\" data-end=\"9042\"\u003eVapour Control Layer\u003c\/strong\u003e – where required by the ceiling construction\u003c\/li\u003e\n\u003cli data-start=\"9088\" data-end=\"9199\" data-section-id=\"1rntxke\"\u003e\n\u003cstrong data-start=\"9090\" data-end=\"9119\"\u003eExpanding Insulation Foam\u003c\/strong\u003e – for appropriate gaps around rigid details, not between the mineral wool rolls\u003c\/li\u003e\n\u003cli data-start=\"9200\" data-end=\"9260\" data-section-id=\"fa1zak\"\u003e\u003cstrong data-start=\"9202\" data-end=\"9260\"\u003eProtective Gloves, Dust Masks and Disposable Coveralls\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9261\" data-end=\"9369\" data-section-id=\"l9gulr\"\u003e\n\u003cstrong data-start=\"9263\" data-end=\"9283\"\u003eAcoustic Sealant\u003c\/strong\u003e – useful for draught sealing around the loft hatch and appropriate ceiling perimeters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"9371\" data-end=\"9417\" data-section-id=\"dzp90x\"\u003eFor a Ceiling Being Rebuilt or Soundproofed\u003c\/h2\u003e\n\u003cul data-start=\"9419\" data-end=\"9829\"\u003e\n\u003cli data-start=\"9419\" data-end=\"9549\" data-section-id=\"1qpl2ba\"\u003e\n\u003cstrong data-start=\"9421\" data-end=\"9458\"\u003eROCKWOOL RW3, RWA45 or Knauf RS60\u003c\/strong\u003e – use instead of loft roll where the ceiling specification requires a denser acoustic slab\u003c\/li\u003e\n\u003cli data-start=\"9550\" data-end=\"9576\" data-section-id=\"ih08cd\"\u003e\u003cstrong data-start=\"9552\" data-end=\"9576\"\u003eFurring Channel 2.4m\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9577\" data-end=\"9597\" data-section-id=\"1qqi9x9\"\u003e\u003cstrong data-start=\"9579\" data-end=\"9597\"\u003eResilient Bars\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9598\" data-end=\"9637\" data-section-id=\"1ryxt33\"\u003e\u003cstrong data-start=\"9600\" data-end=\"9637\"\u003eGenieClip RST or MuteClip systems\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9638\" data-end=\"9670\" data-section-id=\"sh6xfy\"\u003e\u003cstrong data-start=\"9640\" data-end=\"9670\"\u003e15mm Acoustic Plasterboard\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9671\" data-end=\"9693\" data-section-id=\"cbxi8f\"\u003e\u003cstrong data-start=\"9673\" data-end=\"9693\"\u003e19mm Knauf Plank\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9694\" data-end=\"9728\" data-section-id=\"h3hc16\"\u003e\u003cstrong data-start=\"9696\" data-end=\"9728\"\u003eSPK15 boards\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9729\" data-end=\"9761\" data-section-id=\"1xk98z7\"\u003e\u003cstrong data-start=\"9731\" data-end=\"9761\"\u003eTecsound acoustic membrane\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9762\" data-end=\"9784\" data-section-id=\"167gswt\"\u003e\u003cstrong data-start=\"9764\" data-end=\"9784\"\u003eAcoustic Sealant\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"9785\" data-end=\"9829\" data-section-id=\"zy0fi2\"\u003e\u003cstrong data-start=\"9787\" data-end=\"9829\"\u003eDrywall Screws and Appropriate Fixings\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"10082\" data-end=\"10117\" data-section-id=\"1bev7qg\"\u003eSimilar Products and Alternatives\u003c\/h1\u003e\n\u003ch2 data-start=\"10119\" data-end=\"10140\" data-section-id=\"1p7q91a\"\u003eKnauf Loft Roll 44\u003c\/h2\u003e\n\u003cp data-start=\"10142\" data-end=\"10281\"\u003eA close alternative with the same declared thermal conductivity of \u003cstrong data-start=\"10209\" data-end=\"10223\"\u003e0.044 W\/mK\u003c\/strong\u003e. Its combi-cut design is useful for common joist centres.\u003c\/p\u003e\n\u003ch2 data-start=\"10283\" data-end=\"10313\" data-section-id=\"1kgs8ay\"\u003eIsover Spacesaver Loft Roll\u003c\/h2\u003e\n\u003cp data-start=\"10315\" data-end=\"10436\"\u003eA well-known glass mineral wool loft roll available in several thicknesses for between-joist and cross-laid installation.\u003c\/p\u003e\n\u003ch2 data-start=\"10438\" data-end=\"10466\" data-section-id=\"dspqrx\"\u003eURSA 10 Diverso Loft Roll\u003c\/h2\u003e\n\u003cp data-start=\"10468\" data-end=\"10551\"\u003eAnother lightweight loft roll that can be divided for common timber joist spacings.\u003c\/p\u003e\n\u003ch2 data-start=\"10553\" data-end=\"10587\" data-section-id=\"8l04e6\"\u003eODE Lunaflex Loft Roll Ultra 42\u003c\/h2\u003e\n\u003cp data-start=\"10589\" data-end=\"10707\"\u003eA slightly lower lambda product at \u003cstrong data-start=\"10624\" data-end=\"10638\"\u003e0.042 W\/mK\u003c\/strong\u003e, giving marginally greater thermal resistance at the same thickness.\u003c\/p\u003e\n\u003ch2 data-start=\"10709\" data-end=\"10736\" data-section-id=\"1b01nhv\"\u003eSuperglass Multi-Roll 40\u003c\/h2\u003e\n\u003cp data-start=\"10738\" data-end=\"10864\"\u003eA lower lambda Superglass option at \u003cstrong data-start=\"10774\" data-end=\"10788\"\u003e0.040 W\/mK\u003c\/strong\u003e, used where improved thermal performance is required within the same depth.\u003c\/p\u003e\n\u003ch2 data-start=\"10866\" data-end=\"10883\" data-section-id=\"1foetpx\"\u003eROCKWOOL FLEXI\u003c\/h2\u003e\n\u003cp data-start=\"10885\" data-end=\"11064\"\u003eA firmer stone wool slab for fitting between timber framing. It is more appropriate where slabs are preferred or where fire and acoustic requirements influence the product choice.\u003c\/p\u003e","brand":"Soundproofing King","offers":[{"title":"100mm – 10.10m × 1.20m – 1 Roll – 12.12m²","offer_id":53638009979219,"sku":null,"price":31.95,"currency_code":"GBP","in_stock":true},{"title":"150mm – 6.65m × 1.16m – 1 Roll – 7.714m²","offer_id":53638010077523,"sku":null,"price":31.95,"currency_code":"GBP","in_stock":true},{"title":"170mm – 5.80m × 1.16m – 1 Roll – 6.728m²","offer_id":54330798244179,"sku":null,"price":32.95,"currency_code":"GBP","in_stock":true},{"title":"200mm – 4.85m × 1.16m – 1 Roll – 5.626m²","offer_id":53638010175827,"sku":null,"price":32.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/0360\/7891\/files\/download_66.jpg?v=1775699831","url":"https:\/\/soundproofingking.co.uk\/products\/superglass-multi-roll-44-loft-insulation","provider":"Soundproofing King","version":"1.0","type":"link"}