Noisestop Acoustic Underlay 12mm x 1200mm x 1200mm
£31.95 ex. VAT
In stock, ready to ship
Estimated Delivery: 3 - 5 Days
(20th Jan - 22nd Jan)
The Noisestop Acoustic Underlay is a high-performance, double-layered flooring solution that reduces impact and airborne noise transmission. Comprising a 7.5kg mass-loaded vinyl sheet bonded to acoustic foam, it minimises sound effectively. Weighing 8 kg per square meter and just 12 mm thick, this versatile underlay can be installed over timber or concrete floors and is suitable for domestic, commercial, and industrial environments. It reduces noise from footsteps, dropped items, and airborne sounds like TV, music, and speech. When paired with the right ceiling system, it meets UK Building Regulations for separating floors and complies with Part E.
- Soundproofing: Timber and concrete floors
- Noise type: Airborne and impact sound
- Noise reduction:
- Airborne 52dB higher the better
- Impact 50dB lower the better
- Size: 12mm x 1200mm x 1200mm (1.44sqm)
- Cost: £22.18sqm
- Installation: DIY friendly
- Fitting methods: Isobond adhesive, perimeter gripper strips, High Tack Tape
- Finishing options: Directly under carpets, combined with underlay, 9mm T&G MDF under engineered & laminate flooring
Noisestop Acoustic Underlay 12mm is a heavy-duty overlay mat that provides excellent impact sound reduction against footfall and helps minimise airborne sounds. Only 12mm thick, the soundproof underlay has minimal impact on floor build-up. The product combines acoustic-grade closed-cell foam with mass-loaded vinyl. The mats are easy to install as they are loosely laid over the floor and can be cut to size using a sharp knife.
The dual layer means applying the mats foam side up for carpeted floors and foam side down for hard floor finishes. Noisestop Acoustic Underlay is suitable for use on its own or as part of a complete soundproof floor system compliant with Part E Regulations.
- Mass-loaded vinyl 7.5kg/3mm – 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 16kg
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.
- Laid directly over the existing sub-floor
- Loose laid 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 toothsaw
Carpet as the floor finish
Acoustic underlays can be used directly below the carpet. When installing the underlay, you should consider using the perimeter edging strip to ensure the gripper rods are the same height as the carpet. The gripper rods and the perimeter edging should be nailed to the floor using a 30mm nail.
Hard floor finishes equal to or less than 14mm
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 transmitting from the floor to the walls, isolate the flooring using isolation tape fixed to the wall.
Hard floor finishes over 14mm
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 fixed to the wall to prevent potential flanking sound from transmitting from the floor to the walls.
Due to the nature of most of the materials we supply, orders are typically delivered on pallets.
All orders will be wrapped, protected, and secured to the pallet 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 8am and 6pm, Monday to Friday.
Once an order has been placed, you will be notified of the expected delivery date. Please ensure someone is available to sign for the delivery.
We charge a flat delivery rate of £60 plus VAT for palletised deliveries. We do not charge per pallet, no matter how many pallets are used to deliver your order.
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 want to speak to us regarding your delivery, please call 01423 339163.
Please check out our full delivery terms for more details.
Frequently bought together
Got a question?
Send us a message, and we’ll respond as soon as possible. Alternatively, call 01423 339163 to speak with an adviser.