Noisestop Acoustic Underlay 12mm x 1.2m x 1.2m
£31.95 ex. VAT
In stock, ready to ship
Estimated Delivery: 3 - 5 Days
(13th Feb - 15th Feb)
The Noisestop Acoustic Underlay 12mm is a high-performance flooring solution that reduces both airborne and impact noise. Made from a 7.5kg mass-loaded vinyl layer bonded to acoustic foam, it effectively reduces sound from footsteps, dropped objects, TV, speech, and more. Weighing just 8kg/m² and only 12mm thick, this soundproof underlay suits timber and concrete floors in domestic, commercial, and industrial settings. When used with an appropriate ceiling system, it meets UK Building Regulations Part E for separating floors. Ideal for upgrading acoustic performance without raising floor height.
- Sheet size: 12mm x 1200mm x 1200mm (1.44sqm)
- Noise reduction:
- Airborne 52dB (higher the better)
- Impact 50dB (lower the better)
- Soundproofing: Impact & airborne noise – mass & sound damping
- Fitting: Over existing floor
Noisestop Acoustic Underlay 12mm
Premium 12mm Soundproof Underlay for Impact and Airborne Noise Reduction
Improve your living and working spaces with the Noisestop Acoustic Underlay 12mm, a high-performance floor soundproofing solution that reduces impact noise from footfall and airborne sound transmission, such as voices, TV, and music.
At just 12mm thick, this heavy-duty soundproof underlay delivers outstanding acoustic insulation without significantly increasing floor height. It is ideal for renovations and new-build projects where space and sound control are priorities.
The dual-layer construction features acoustic-grade closed-cell foam bonded to mass-loaded vinyl (MLV), offering superior durability, sound absorption, and flexibility across various flooring types.
- Noise reduction: Airborne 52dB | Impact 50dB
- Size: 12mm x 1200mm x 1200mm (1.44sqm)
- Installation: DIY-friendly, use Isobond adhesive, gripper strips, or High Tack Tape
- Finishes: Under carpets, or with 9mm T&G MDF for laminate & engineered floors
- Price: £22.18/sqm
Versatile installation:
- Install foam side up for carpeted floors
- Install foam side down for hard floors like wood, laminate, or tiles
Installation is simple, loose lay the mats over your subfloor and trim to size with a sharp knife. No adhesives, nails, or specialist tools needed, making it the perfect DIY-friendly soundproof flooring solution.
Use the Noisestop Acoustic Underlay 12mm alone for effective noise control or integrate it into a complete Part E-compliant floor soundproofing system for full building regulation compliance.
Why Choose the Noisestop Acoustic Underlay 12mm
- Heavy-duty soundproof underlay for floors
- Reduces both impact noise and airborne noise
- Slimline 12mm thickness — minimal floor height impact
- Easy to install — loose lay and cut to fit
- Suitable under carpet, wood, laminate, and vinyl flooring
- Ideal for domestic and commercial soundproofing projects
- Helps meet Part E Building Regulations when used as part of a complete system
Typical Applications:
- Upgrading sound insulation between flats and apartments
- Soundproofing floors in renovation or refurbishment projects
- Installing beneath wood, laminate, carpet, and vinyl floors
- Reducing footfall and airborne noise in living rooms, bedrooms, and offices
Create quieter, more comfortable spaces with Noisestop Acoustic Underlay 12mm — the trusted choice for effective floor soundproofing.
Noisestop Acoustic Underlay 12mm
- 3mm Mass-loaded vinyl 7.5kg/m² – High mass barrier layer for sound absorption.
- Closed cell foam 9mm – Acoustic grade foam to dampen and absorb vibration sound.
- System thickness 12mm
- Size 1200mm x 1200mm (1.44sqm)
- Weight 13kg per sheet
Thermal Resistance R:
- Closed Cell Foam: 0.23 m² K/W
- Mass-loaded vinyl 0.14 m² K/W
Thermal Conductivity λR:
- Closed Cell Foam: 0.039 W/mK
- Mass-loaded vinyl 0.037 W/mK
Reaction to Fire
- Closed Cell Foam: FMVSS 302
- Mass-loaded vinyl 10kg EN 13501-1 B-s2,d0 (2
The higher the figure for airborne, the better the performance. The lower the figure for impact the better the performance.
Timber floor airborne results
18mm chipboard laid direct to 200mm joist with 10mm plasterboard.
Without soundproofing 41dB
With 12mm Acoustic Underlay 48dB
With 12mm Acoustic Underlay and 100mm insulation 52dB
With 12mm Acoustic Underlay and 100mm insulation with Soundbreaker bars and 12.5mm plasterboard (two layers) 60dB
Timber floor impact results
18mm chipboard laid direct to 200mm joist with 10mm plasterboard.
Without soundproofing 79dB
With 12mm Acoustic Underlay 52dB
With 12mm Acoustic Underlay and 100mm insulation 50dB
With 12mm Acoustic Underlay and 100mm insulation with Soundbreaker bars and 12.5mm plasterboard (two layers) 46dB
Concrete floor impact results
Due to the high mass of concrete flooring, acoustic underlays are only used to reduce impact noise.
200mm Concrete flooring
Without soundproofing 79dB
With 12mm Acoustic Underlay 52dB
Note: Every 10 decibels(dB) reduction in noise level is roughly perceived as a halving of the perceived loudness. So, for instance, if you have a sound that measures 70dB and it decreases to 60dB, it would sound about half as loud to the human ear. Decibels explained.
Fitting Noisestop Acoustic Underlay 12mm
- Laid directly over the existing sub-floor
- Loose-laid has no requirement to bond to the floor. Part E requires bonding for new builds and conversions.
- Butt the edges together
- Reduce movement with High Tack Tape along the joins
- Cut to size using a sharp knife or a fine-tooth saw
Carpet as the floor finish
Acoustic underlays can be used directly below the carpet. When installing the underlay, consider utilising the perimeter edging strip to ensure the gripper rods are at the same height as the carpet. The gripper rods and perimeter edging should be nailed to the floor using 30mm nails.
Hard floor finishes equal to or less than 15mm
Hard floor finishes, including laminate, engineered, and tiles, should use a resilient layer between the soundproofing and the floor finish. We recommend a 9mm MDF T&G interlocking sheet. The layers are secured using a floor-grade adhesive such as Isobond floor adhesive. To prevent potential flanking sound from the floor to the walls, isolate the flooring with isolation tape attached to the wall.
Hard floor finishes over 15mm
Floor finishes over 15mm can be installed directly on the soundproof mats. Secure the flooring using the Isobond adhesive. Isolate the flooring using isolation tape affixed to the wall to prevent potential flanking sound from the floor reaching the walls.
Delivering soundproofing throughout the UK
Due to the nature of most of the materials we supply, orders are typically delivered on pallets.
All orders will be carefully wrapped, protected, and securely palletised to ensure they arrive in the best possible condition. Goods will be delivered as near to the property as possible. The drivers will not be able to carry orders into your property.
Deliveries are made between 8:00 a.m. and 6:00 p.m. Monday to Friday.
We charge a flat delivery rate of £60 plus VAT for most palletised deliveries. We do not charge per pallet, regardless of the number of pallets used to deliver your order.
Certain postcodes will incur a higher delivery charge than our standard rate, including those in Northern Ireland, Northern Scotland, and the Islands off the mainland.
Orders placed for items weighing less than 20kg will be sent via courier for £20 plus VAT.
We have a high stock level and typically deliver orders in approximately three to four working days.
If you would like to speak with us about your delivery, please call 01423 339163. Alternatively, you can send us your delivery enquiry.
Please review our full delivery terms for more information.
We don’t currently deliver outside the UK.
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Send us a message, and we’ll respond as soon as possible. Alternatively, call 01423 339163 to speak with an adviser.
