12mm Memory Foam Luxury Carpet Underlay | 3.5 TOG | 49dB Sound Reduction | Mini, Half & Full Roll
12mm Memory Foam Luxury Carpet Underlay | 3.5 TOG | 49dB Sound Reduction | Available in 3 Roll Sizes The underlay that transforms a carpet. This 12mm premium memory foam carpet underlay uses the same bounce-back technology as high-end memory foam mattresses — delivering a level of underfoot comfort, warmth, and sound insulation that standard PU foam underlays simply cannot match. If you're investing in a quality carpet, this is the underlay it deserves underneath it. Available in three roll sizes: Mini Roll (5m²), Half Roll (7.5m²), and Full Roll (15.07m²). All rolls are 1.37m wide. Why Memory Foam Underlay Outperforms Standard PU Foam Standard PU foam underlay compresses under foot traffic and never fully recovers — within a few years the carpet above it feels thin, the underlay feels flat, and the luxury feel is gone. Memory foam technology changes this fundamentally: 92% compression recovery vs 78% for standard PU foam — the underlay springs back fully after every footstep, maintaining its loft and feel for the lifetime of the carpet 49dB impact sound reduction — dramatically reduces footfall noise between floors; ideal for first-floor bedrooms above living rooms, flats, and anywhere noise transmission is an issue 3.5 TOG thermal rating — significant thermal insulation, reducing heat loss through the floor and contributing to lower energy bills Damp Proof Membrane (DPM) — built-in moisture barrier on the underside protects the subfloor from accidental spills that penetrate carpet and underlay A+ Air Quality rated — low VOC, low formaldehyde construction; important for bedrooms, nurseries, and areas where air quality matters 105kg/m³ density — a genuinely high-density foam that stays firm and supportive rather than bottoming out under furniture Product Specifications Type Luxury Memory Foam PU Underlay Thickness 12mm Density 105 kg/m³ TOG Rating 3.5 TOG (thermal insulation) Sound Reduction 49dB impact sound Compression Recovery 92% (vs 78% standard PU foam) Backing Damp Proof Membrane (DPM) Air Quality A+ rated — low VOC & formaldehyde Roll Width 1.37m Application Lay black DPM side down, foam face up Suitability Luxury domestic — all rooms including stairs Roll Sizes Size Coverage Dimensions Best for Mini Roll 5m² 3.7m × 1.37m Single room, hallway, landing Half Roll 7.5m² 5.5m × 1.37m Medium room, stairs + landing Full Roll 15.07m² 11m × 1.37m Large room, whole floor, trade use Where to Use Living rooms — the 12mm depth and memory foam deliver a luxurious, hotel-lobby feel underfoot that standard underlays cannot achieve Bedrooms — A+ air quality rating and exceptional thermal insulation make this the right choice for sleeping areas Stairs and hallways — 92% compression recovery ensures the underlay maintains its performance through sustained high foot traffic Flats and apartments — 49dB sound reduction significantly reduces impact noise transmission to the floor below Dining rooms — DPM backing protects the subfloor from food and drink spills that penetrate carpet Installation Lay the underlay with the black DPM membrane face down and the foam face upward. Butt joins tightly — do not overlap. Secure joins with carpet underlay tape and fix corners with suitable spray adhesive. Trim to size with a sharp knife or scissors. Lay carpet over the top in the normal manner using gripper rods at the room perimeter. Order Guide Measure your room's length and width in metres and multiply to get the area in m². Add 10% for cutting waste and choose the roll size that covers your total requirement. For rooms wider than 1.37m you will need multiple strips — ensure joins fall in low-traffic areas where possible and always run strips in the same direction.