F7 Plus 15mm Sound Insulation Underlay 1.2m x 1.2m
£41.95 ex. VAT
In stock, ready to ship
Estimated Delivery: 2 Days
(16th Oct)
The Noisestop F7 Plus is a premium sound insulation underlay designed to significantly reduce both impact noise and airborne sound through timber and concrete floors.
Our 15mm acoustic mat features a triple-layered construction, combining two high-mass 7.5kg mass-loaded vinyl sheets with a resilient acoustic foam core. This unique design delivers excellent impact sound absorption and enhances airborne noise reduction across domestic and commercial spaces.
Ideal for use beneath carpets, laminate, or engineered wood, the F7 Plus is DIY-friendly and compatible with a range of floor finishes. It can also help meet UK Building Regulations for separating floors when installed with a suitable ceiling system.
Key Features:
- Noise reduction:
– Airborne: Up to 55dB (higher is better)
– Impact: As low as 48dB (lower is better)
- Size: 15mm x 1200mm x 1200mm (1.44sqm coverage)
- Cost: £29.13 per sqm
- Installation: DIY-friendly with Isobond adhesive, perimeter gripper strips, or high tack tape
- Finish options:
– Directly under carpets as a sound insulation carpet underlay
– Combined with underlay
– 9mm T&G MDF over the top for laminate and engineered flooring
Noisestop F7 Plus Soundproof Underlay 15mm
High-Performance Soundproof Underlay for Floors
Looking for an effective way to reduce noise through your floors? The Noisestop F7 Plus Soundproof Underlay 15mm is the perfect solution for homeowners and professionals who need reliable impact noise and airborne sound insulation.
This premium acoustic underlay features a triple-layer design combining high-density mass-loaded vinyl and closed-cell acoustic foam to deliver excellent soundproofing performance. It significantly reduces footfall noise, conversation, TV sound, and general airborne noise between floors.
At just 15mm thick, the Noisestop F7 Plus adds minimal build-up to your floor height, making it ideal for renovation projects where space is a concern.
Easy to install: Loosely lay the mats across your floor and cut them to size with a sharp knife. No adhesives or specialist tools are needed. Suitable for use under carpet, laminate, wood, and other hard floor finishes.
You can use the Noisestop F7 Plus alone for significant sound reduction or as part of a complete floor soundproofing system that complies with Part E Building Regulations.
Why Choose the Noisestop F7 Plus
- Reduces both impact noise (footsteps) and airborne sound (speech, TV)
- Only 15mm thick — minimal impact on floor height
- Triple-layer construction for superior acoustic performance
- Easy to install — no glueing or screwing required
- Ideal for use under carpets, laminate, wood, and vinyl floors
- Suitable for domestic and commercial soundproofing
- Meets Part E Regulations when used within a full 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
- 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.
- 3mm Mass-loaded vinyl 7.5kg/m² – High mass barrier layer for sound absorption.
- System thickness 15mm
- Size 1200mm x 1200mm (1.44sqm)
- Weight 23kg 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 15mm Acoustic Underlay 51dB
With 15mm Acoustic Underlay and 100mm insulation 55dB
With 15mm Acoustic Underlay and 100mm insulation with Soundbreaker bars and 12.5mm plasterboard (two layers) 63dB
Timber floor impact results
18mm chipboard laid direct to 200mm joist with 10mm plasterboard.
Without soundproofing 79dB
With 15mm Acoustic Underlay 50dB
With 15mm Acoustic Underlay and 100mm insulation 48dB
With 15mm Acoustic Underlay and 100mm insulation with Soundbreaker bars and 12.5mm plasterboard (two layers) 44dB
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 15mm Acoustic Underlay 50dB
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 interlocking T&G board. 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.
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.
Frequently bought together
9mm T&G Moisture Resistant MDF Overlay Board 1.2m x 0.6m
£10.55 exc VAT.
High Tack Tape 33m x 50mm
£12.9 exc VAT.
Isobond Adhesive 12kg 10 Litre Tub
£59.5 exc VAT.
Perimeter Edging Gripper Rod Strips 9mm x 1200mm x 25mm
£5.65 exc VAT.
Perimeter Isolation Tape 25m x 100mm x 5mm Flanking Strip
£12.3 exc VAT.
Acoustic Insulation Slabs - Soundproof Insulation
£43 exc VAT.
Alternative solutions
Got a question?
Send us a message, and we’ll respond as soon as possible. Alternatively, call 01423 339163 to speak with an adviser.