{"product_id":"acoustic-cork-rubber-underlay-3mm-4-5mm-part-e","title":"SilentCloud Acoustic Cork Rubber Underlay | Premium Soundproofing Floor Underlay | 3mm \u0026 4.5mm | 20m² Roll","description":"\u003ch2\u003eThe UK's #1 Acoustic Cork \u0026amp; Rubber Floor Underlay — Superior Soundproofing for Every Floor Type\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSilentCloud Acoustic Cork Rubber Underlay\u003c\/strong\u003e is the professional-grade sound deadening solution trusted by architects, contractors, and homeowners across the UK. Engineered from a premium blend of recycled rubber, natural cork, and polymer binder, this underlay delivers outstanding impact noise reduction, airborne sound absorption, and thermal insulation — all in a single, easy-to-install roll.\u003c\/p\u003e\n\u003cp\u003eWhether you're laying \u003cstrong\u003eengineered wood, LVT, laminate, vinyl, carpet, or ceramic tiles\u003c\/strong\u003e, SilentCloud provides the acoustic performance needed to meet \u003cstrong\u003eBuilding Regulations Part E\u003c\/strong\u003e and \u003cstrong\u003eDocument E\u003c\/strong\u003e compliance in both residential and commercial builds.\u003c\/p\u003e\n\u003ch2\u003eWhy SilentCloud Outperforms Every Other Underlay on the Market\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Impact Sound Reduction (ΔLw):\u003c\/strong\u003e Significantly reduces footfall, impact, and airborne noise transmission between floors — ideal for flats, apartments, offices, and commercial premises.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument E \u0026amp; Building Regs Compliant:\u003c\/strong\u003e Meets UK building regulations for acoustic performance in both new-build and refurbishment projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% Recycled \u0026amp; Eco-Friendly:\u003c\/strong\u003e Made from waste rubber and natural cork — a sustainable, low-carbon choice that doesn't compromise on performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderfloor Heating Compatible:\u003c\/strong\u003e Low thermal resistance ensures maximum heat transfer efficiency — your UFH system works harder, not against your underlay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemains Elastic for Life:\u003c\/strong\u003e Unlike foam underlays that compress and fail, SilentCloud maintains its resilience permanently, protecting your floor investment long-term.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for Concrete \u0026amp; Screed Subfloors:\u003c\/strong\u003e Minimal construction height (3mm or 4.5mm) makes it the go-to choice where floor height is critical.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire Resistant:\u003c\/strong\u003e Provides an additional layer of fire safety — essential for commercial, healthcare, and educational environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces Footfall Noise:\u003c\/strong\u003e Creates a noticeably quieter living and working environment — reduce complaints in HMOs, apartments, offices, and hotels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll Size:\u003c\/strong\u003e 20m × 1m (20m² per roll)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Options:\u003c\/strong\u003e 3mm | 4.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM² Weight:\u003c\/strong\u003e 3mm = 2.05 kg\/m² | 4.5mm = 3.62 kg\/m²\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e Recycled rubber, natural cork, polymer binder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Black\/Beige\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Texture:\u003c\/strong\u003e Fine Granulate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e 0.6 N\/mm² (DIN 53571)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElongation at Break:\u003c\/strong\u003e 80% (DIN 53571)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Set:\u003c\/strong\u003e Max. 10% at 0.02 N\/mm² (DIN 53572)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressibility:\u003c\/strong\u003e Max. 15% at 0.02 N\/mm² (DIN 53572)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Absorption:\u003c\/strong\u003e Max. 2% (DIN 53428)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e Document E | Building Regulations Part E | DIN Standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhere Can SilentCloud Be Used?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eResidential:\u003c\/strong\u003e Apartments, flats, houses, HMOs, loft conversions, and extensions. Ideal under engineered wood, laminate, LVT, vinyl, and carpet to dramatically reduce noise between floors and rooms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommercial:\u003c\/strong\u003e Offices, hotels, restaurants, retail units, and co-working spaces where a quiet environment drives productivity, customer satisfaction, and regulatory compliance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHealthcare \u0026amp; Education:\u003c\/strong\u003e Hospitals, GP surgeries, clinics, schools, colleges, and universities where acoustic comfort is critical for patient wellbeing and learning outcomes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNew Build \u0026amp; Refurbishment:\u003c\/strong\u003e Approved for use in both new construction and retrofit projects, meeting the acoustic requirements demanded by building control and housing associations.\u003c\/p\u003e\n\u003ch2\u003eCompatible Floor Finishes\u003c\/h2\u003e\n\u003cp\u003eSilentCloud Acoustic Cork Rubber Underlay works seamlessly under: engineered hardwood, solid wood (floating), laminate, LVT \/ luxury vinyl tile, vinyl plank, carpet, ceramic and porcelain tiles, and resin floors.\u003c\/p\u003e\n\u003ch2\u003eEasy Installation — Professional Results\u003c\/h2\u003e\n\u003cp\u003eSimply roll out, butt-join the edges (no overlap), and lay your chosen floor finish on top. No specialist tools or adhesives required for most installations. The underlay remains flat, stable, and resilient throughout the full lifespan of your floor. Full installation guidance included with every order.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this underlay suitable for underfloor heating?\u003c\/strong\u003e\u003cbr\u003eYes. SilentCloud has excellent thermal conductivity properties, making it fully compatible with wet and electric underfloor heating systems without compromising performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it meet UK Building Regulations Part E?\u003c\/strong\u003e\u003cbr\u003eYes. SilentCloud is Document E compliant and suitable for use in all new-build and conversion projects requiring acoustic performance certification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich thickness should I choose?\u003c\/strong\u003e\u003cbr\u003e3mm is ideal where floor height is limited or for underfloor heating installations. 4.5mm provides superior acoustic and thermal performance and is recommended for maximum noise reduction in multi-occupancy buildings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used under tiles?\u003c\/strong\u003e\u003cbr\u003eYes. The rigid yet resilient composition of SilentCloud makes it suitable for use as an underlayment beneath ceramic and porcelain tiles with appropriate adhesive.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it environmentally friendly?\u003c\/strong\u003e\u003cbr\u003eAbsolutely. SilentCloud is manufactured from 100% recycled rubber and natural cork — a genuinely sustainable product with full environmental credentials.\u003c\/p\u003e\n\u003ch2\u003eOrder Today — Fast UK Delivery Available\u003c\/h2\u003e\n\u003cp\u003eJoin thousands of UK contractors, architects, and homeowners who trust SilentCloud as their sound deadening underlay of choice. Available in 3mm and 4.5mm in 20m² rolls, with fast despatch from our UK warehouse. Order before 2pm for next-day delivery options.\u003c\/p\u003e\n\u003ch2\u003eAcoustic Cork Rubber Underlay — Why It Outperforms Standard Rubber Underlays\u003c\/h2\u003e\n\u003cp\u003eOur \u003cstrong\u003eacoustic cork rubber underlay\u003c\/strong\u003e combines the dense vibration-absorbing properties of recycled rubber with the natural acoustic and thermal benefits of cork — creating a premium underlay that outperforms either material used alone. The cork element adds natural buoyancy and resilience, reducing floor reflection of sound, while the rubber base provides the structural density needed for effective impact noise reduction. Together, they create one of the most effective and environmentally responsible acoustic underlay solutions available in the UK.\u003c\/p\u003e\n\u003cp\u003eAvailable in both 3mm and 4.5mm thicknesses on a 20m² roll, the SilentCloud Acoustic Cork Rubber Underlay is suitable for a wide range of flooring applications. It's particularly popular for installations where both acoustic performance and a premium underfoot feel are priorities — the cork-rubber blend delivers a noticeably firmer, more natural feel underfoot compared to foam alternatives.\u003c\/p\u003e\n\u003ch2\u003eBest Acoustic Underlay for Laminate Flooring — Cork Rubber for Superior Results\u003c\/h2\u003e\n\u003cp\u003eFor those seeking the \u003cstrong\u003ebest acoustic underlay for laminate flooring\u003c\/strong\u003e with a natural, premium composition, cork rubber is the material of choice. The cellular structure of cork is naturally sound-absorbent, and when combined with dense recycled rubber, the result is an underlay that addresses both impact noise (footsteps, impacts) and airborne sound (voices, music) — making it effective across a broader noise-reduction spectrum than single-material underlays.\u003c\/p\u003e\n\u003cp\u003eAvailable in 3mm and 4.5mm options, it adapts to different project requirements: the 3mm version is ideal where floor height is limited, while the 4.5mm offers enhanced acoustic performance for properties where maximum noise reduction is the priority. Both variants provide excellent stability beneath laminate planks, preventing movement and edge-lifting over time.\u003c\/p\u003e\n\u003ch2\u003eSoundproof Underlay Part E — Cork Rubber Acoustic Performance\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003esoundproof underlay Part E\u003c\/strong\u003e compliant product is suitable for use in acoustic flooring assemblies meeting the requirements of Approved Document E of the UK Building Regulations. The cork-rubber composition delivers strong impact noise reduction performance, making it appropriate for residential properties, flat conversions, and HMOs where Part E compliance is required.\u003c\/p\u003e\n\u003cp\u003eThe natural cork content also contributes to thermal insulation, helping to improve the energy efficiency of your floor as well as its acoustic performance — an added benefit that is increasingly valued in modern residential construction where both acoustic and thermal standards are specified.\u003c\/p\u003e\n\u003ch2\u003eSound Deadening Underlay for Floors — How Cork Rubber Works\u003c\/h2\u003e\n\u003cp\u003eThe SilentCloud Acoustic Cork Rubber Underlay functions as a \u003cstrong\u003esound deadening underlay for floors\u003c\/strong\u003e through its unique dual-material composition. The rubber component provides dense mass and structural rigidity that decouples the floor surface from the subfloor, absorbing and dissipating impact energy before it can be transmitted as structure-borne noise. The cork component adds a secondary layer of acoustic absorption, particularly effective at mid and high-frequency sound transmission.\u003c\/p\u003e\n\u003cp\u003eThis makes the cork-rubber underlay particularly effective in properties where both impact noise (footsteps between floors) and airborne noise (sound transmission through walls and floors) are concerns. Its natural composition also makes it a preferred choice for homeowners who value sustainable, eco-friendly building materials.\u003c\/p\u003e\n\u003ch2\u003eImpact Noise Reduction Underlay UK — Cork Rubber Technical Specification\u003c\/h2\u003e\n\u003cp\u003eThe SilentCloud Acoustic Cork Rubber Underlay UK specification is as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e Premium blend of recycled rubber and natural cork\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable thicknesses:\u003c\/strong\u003e 3mm and 4.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll size:\u003c\/strong\u003e 20m² per roll\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e Laminate, engineered wood, LVT, solid wood (floating)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilding Regulations:\u003c\/strong\u003e Part E compliant acoustic system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal benefit:\u003c\/strong\u003e Natural cork improves thermal insulation of the floor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderfloor heating:\u003c\/strong\u003e Compatible with UFH systems (check manufacturer spec for thickness)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEco credentials:\u003c\/strong\u003e Natural cork + recycled rubber — sustainable and low-carbon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubfloor compatibility:\u003c\/strong\u003e Timber and concrete subfloors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e UK stocked, fast delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 4.5mm variant is particularly popular for projects where maximum acoustic performance is required and floor height allows for the additional thickness — delivering enhanced impact noise reduction compared to the standard 3mm option.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the difference between cork rubber underlay and plain rubber underlay?\u003c\/h3\u003e\n\u003cp\u003eCork rubber underlay combines natural cork with recycled rubber to create a premium composite material. The cork adds natural sound absorption (particularly for mid and high-frequency noise), thermal insulation, and a firmer, more natural underfoot feel. Plain rubber underlay relies solely on dense rubber mass for acoustic performance. Cork rubber is generally considered the premium option — particularly suited to high-end flooring installations where both performance and sustainability are priorities.\u003c\/p\u003e\n\u003ch3\u003eDoes the acoustic cork rubber underlay meet Part E Building Regulations?\u003c\/h3\u003e\n\u003cp\u003eYes. The SilentCloud Acoustic Cork Rubber Underlay is suitable for use in acoustic flooring assemblies meeting Approved Document E of the UK Building Regulations. It delivers strong impact noise reduction and is appropriate for use in residential flats, conversions, and HMOs where Part E compliance is required. For full sign-off, we recommend confirming the complete system specification with your acoustic consultant or building control officer.\u003c\/p\u003e\n\u003ch3\u003eWhich thickness should I choose — 3mm or 4.5mm?\u003c\/h3\u003e\n\u003cp\u003eChoose 3mm where floor height is limited — for example, in doorway clearance situations, adjacent room transitions, or under-stair installations. Choose 4.5mm where maximum acoustic performance is the priority and the additional 1.5mm increase in floor height is acceptable. The 4.5mm variant provides enhanced impact noise reduction and is ideal for upper-floor installations in flats or conversions where noise between floors is a primary concern.\u003c\/p\u003e\n\u003ch3\u003eHow much acoustic cork rubber underlay do I need?\u003c\/h3\u003e\n\u003cp\u003eMeasure each room (length × width in metres) to calculate your floor area in square metres. Add 10% for cuts and wastage. Each roll covers 20m² — if your total area is under 20m², one roll will be sufficient. For areas over 20m², calculate how many rolls you need by dividing your total area (plus 10% waste) by 20. For example, a 35m² total area with 10% waste = 38.5m² ÷ 20 = 2 rolls.\u003c\/p\u003e\n\u003ch3\u003eIs cork rubber underlay compatible with underfloor heating?\u003c\/h3\u003e\n\u003cp\u003eYes — both the 3mm and 4.5mm variants of this cork rubber underlay are compatible with underfloor heating systems. Natural cork has good thermal properties and allows efficient heat transfer from the UFH system to the floor surface. However, for hot-water (hydronic) UFH systems where thermal resistance (tog rating) is specified, we recommend confirming compatibility with your UFH system supplier to ensure the underlay's tog value is within the acceptable range for your heating output requirements.\u003c\/p\u003e","brand":"Silentcloud","offers":[{"title":"3mm x 1m x 20m","offer_id":42674633408685,"sku":null,"price":225.0,"currency_code":"GBP","in_stock":true},{"title":"4.5mm x 1m x 20m","offer_id":42674633441453,"sku":null,"price":350.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/6176\/6061\/files\/professional-uk-flooring-installer-rolling-out-black-acoustic-cork-rubber-underlay-across-a-bright-modern-uk-apartment-living-room-floor-the-roll-of-black-textured-underlay-is-promine.png?v=1778504077","url":"https:\/\/www.sounddeadeninguk.co.uk\/products\/acoustic-cork-rubber-underlay-3mm-4-5mm-part-e","provider":"Sound Deadening UK","version":"1.0","type":"link"}