Soundproofing Mat - 1.25m by 1m by 2mm thick - 5kg Membrane - B-Grade


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5kg Soundproofing Mat

1.25m wide by 1m long by 2mm thin

B-Grade - This product is an off-cut from a damaged roll.

What Are The Benefits?

Our 5kg Soundproofing Mat is a flexible 2mm thin mineral loaded soundproofing mat which is designed to block and reduce airborne noise through stud walls and timber joisted floors and ceilings.  It is equal to Lead of the same mass in effectiveness and acts as a thin de-coupling sound blocker in stud walls and timber floors.  The biggest sound insulation can be achieved when one layer is sandwiched between two sheets of plasterboard on lightweight structures.

One layer of Soundproofing Mat has an insulation value of 24dB, two layers has a value of 29dB and three layers has an insulation value of 32dB.  These values are calculated when the soundproofing mat is hung a curtain.  The Soundproofing Mat will not offer the same amount of sound isolation when used in a timber wall or timber floor structure but simply proves that these 5kg Soundproofing Mats are a highly effective method of sound insulation of stud walls, timber floors and ceilings.

Normally a 3dB improvement is equal to a 50% loss in the volume of noise, depending on where you are standing.

For Use On Walls.

To get the best results from this product, it should be sandwiched between two layers of high density Acoustic Plasterboard as part of a stud partition soundproofing solution as detailed above and is suitable to help reduce loud noise nuisance when used in this way.  It can also be used as a free hanging curtain behind 2 layers of acoustic plasterboard.

For Use On Floors

First ensure the floorboards are securely screwed to the floor so as not to squeak when walked over, Green Glue Noiseproofing Tape can be used to help further minimise this. Then use our Acoustic Sealant and fill in the joints between the floorboards and around the edge of the room making the floor is as airtight as possible. Then using our Contact Adhesive glue the layers of soundproofing mat to the timber floor. This will dramatically reduce airborne noise penetrating the floor from below or any airborne noise you create being transmitted to below but will not significantly reduce any footfall or impact noise.

Additional Notes

We recommend you use our Specially Formulated Contact Adhesive to assist with installing this product.  Please bear in mind that this adhesive is a contact adhesive.  Once the product is offered up to the surface and stuck it can't be easily repositioned.

Because our Soundproofing Mat is made from recycled manufacturing materials there may be a 'rubbery' smell when the product is first unwrapped.  Usually any smell will dissipate within a few days but as a precaution it is possible to apply a thin layer of polythene over the Soundproofing Mat before the final covering is installed to seal in any possible smells.

What Are The Technical Details?

Product Name 5kg Soundproofing Mat
Product Size 1.25m x 1m (nominal)
Product Thickness 2.6mm
Area Covered Per Roll 1.25sqm
Product Weight 5kg/m2 (18.75kg per roll)
Hardness 76 (Durometer Shore A, 1 sec dwell)
Tensile Strength 0.9mpA (JISK6251)
Elongation At Break >100% (JISK6251)
Dimensional Stability 2% (4hr @ 100oC)
Surface Tension >44 dynes/cm
Flamability <100 mm/min (FMVSS 302)
Colour Grey
Acoustic Properties
(Airborne Sound Insulation) -
to ISO R140 Free Hanging Curtain
100Hz 10 R (dB)
200Hz 15
500Hz 20
1000Hz 28
2000Hz 33
4000Hz 38

To quickly find out the shipping cost for your order simply add the required items to your cart. Place your cursor over the cart icon at the top of the page. Click on "Calculate Cart Shipping". Select your country and region and enter your postcode. The shipping rate will be displayed. If your country is not listed please contact us for a shipping quote.

UK Shipping Charges For Most Products

Orders with a value of £0.00 to £54.99 have a £7.00 carriage charge with tracked next working day delivery.

Orders with a value of 55.00 to £99.99 have a £12.00 carriage charge with tracked next working day delivery.

Orders with a value of £100.00 or more qualify for free next day shipping.

Excluded Items

For carts which contain Plasterboard, Soundproofing Mat, SilentBoard, QuietPanel, Silent Floor Ultra, M20 and R10 the following charges apply

£8.00 carriage for the first item and £4.00 carriage for every item added up to a maximum charge of £75.00.

Some soundproofing items have a minimum order due to shipping constraints.

Bulk Products have a £75.00 pallet charge per item.


Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Non-returnable items:- Made to order items such as our Office Acoustic Panels and High End Audio Acoustic Panels, Gift cards.

To complete your return, we require a receipt or proof of purchase. Please contact us for your return authorisation number. Once your return is received and inspected, we will send you an email to notify you that we have received your returned item.


We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to: Advanced Acoustics LTD, Unit B, Maunside, Green Line Industrial Estate, Mansfield, NG18 5GU, United Kingdom.

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