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Floor Solution 4

Where airborne noise from below is the issue SBx boards and Tecsound are a truly effective "under the carpet solution"

A very DIY-able solution that brings significant improvements to your privacy and comfort.
SBx Boards are our most effective solution when looking for ease of fit ( no need to lift floorboards)  

They are effective in :

i) Blocking airborne noise rising from below ( and from your room to the room below) - be aware they are far more effective than rubber mat solutions for this purpose which typically only offer only 5dB airborne protection.
ii) Decreasing your impact sound experienced to the room below.
iii) Improving the acoustics in the soundproofed room.


SBx Boards are very simple to install with the boards simply being laid butted together on the floor beneath a carpet, tiles, floating floor or laminate. For a full description of the boards see SBx boards on our products page. We are of the opinion that the SBx boards offer the best thickness to performance ratio of all above the floor soundproofing products outperforming heavy rubber mats when stopping sound rising.
The Sbx board is a sand filled board that works more effectively than just simply adding more mass to the ceiling. Conventional wisdom states that as you increase the mass of the dividing structure you improve the soundproofing. However simply adding more mass runs into the law of diminishing returns. The beauty of the SBx board is that the material in the core is loose and arranged in an irregular fashion. This irregularity and looseness disrupts the passage of sound more effectively than the dead mass of rubber or solid boards.

For customers wishing to further enhance the performance of SBx boards as a simple lay over the floor solution we can highly recommend the Tecsound 50 membrane. A heavy high performance membrane which is an excellent .For customers looking to insulate noisy pipes please see our acoustic pipe wrap.



      Soundproofing and tiling bathrooms/kitchens
SBx Board Core The unique fluted inner core of SBx boards allow "give" while maintaining its shape. This award winning German design means that the board can be used as a rigid surface that will still reduce impact sound considerably.   A common problem in bathrooms is wanting to reduce impact sound and still have tiles. The SBx boards means you can tile and still reduce impact sound. We don't know of another product that provides the necessary rigidity to tile over, while still providing impact sound protection

NOTE: where noise from below is your problem you should be concentrating on getting the maximum arirborne uplift you can. While rubber mats vastly improve impact sound reduction ( benefiting downstairs neighbors) they are not as good at reducing the sound coming up.


Solution 4a


Solution 4b


Diagram of DB Boards

Fitting Instructions

Solution 4a adding Tecsound 50

Diagram of SBx Boards and mineral wool

Fitting Instructions



Calculate Solution 4b adding Tecsound 50 option

Tecsound 50 can be upgraded to the thicker Tecsound 70. This will add a further 2-3 decibels to overall performance of this solution

Solution 4a adding Tecsound 70

Tecsound 50 can be upgraded to the thicker Tecsound 70. This will add a further 2-3 decibels to overall performance of this solution

Calculate Solution 4b adding Tecsound 70 option



Acoustic floor treatments compared


Remember if you have noise from below the higher the "airborne uplift" the better.

Floor Height Gain Labour intensity Overall acoustic performance Typical Airborne Improvement Typical Impact Improvement Comparing with other products*
Solution 1 - Improving airborne Soundproofing           See Important note below
2mm Medium Great airborne noise attenuation 13db 4db 52db Rw
2mm Medium Excellent airborne noise attenuation 18db 4db 56db
Solution 2&3 Improving impact and airborne Sound proofing            

Solution 2a: Acoustic Joist Strips Incorporating MuteBoards with mineral wool

12mm Med/High A great option where you can replace your floor boards with T&G Flooring 18db 20db 56db

Solution 2b: Acoustic Joist Strips Replacing Floor Boards with mineral wool

12mm Med/High A great option where you can replace your floor boards with T&G Flooring 16db 22db 55db

Solution 3: Under Floor Hangers retaining original floor boards

7mm High Where your impact sound is a problem and you wish to retain floorboards this is an excellent choice. 17db 15db 53db
Solution 4&5 Improving impact and airborne soundproofing - Above Floor            
17mm Low Our most popular quick to fit choice for impact and airborne soundproofing 17db (21db*) 18db (19db) 51db (57db)

Solution 4b: SBx Boards with wool (+Tecsound 50*)

17mm Medium The most effective choice at combating airborne sound from below. 22db (24db*) 20db (22db) 55db (60db)
15mm Low An excellent choice for reducing impact sound transmission. 7db 36db 43db

Solution 5b: Absorbalay with mineral wool

15mm Medium Adding mineral wool to Solution 5a will materially improve airborne results 14db 37db 50db

Isosonic Mat (+ Tecsound 50*) (performance in blue)

Improvement over Laminate floor


6mm (8mm inc Tecsound) Low Excellent addition under laminate, structured engineered floor


20db (21db) 39db (50db)

Important Note*

As a consumer comparing different products from different companies is very hard.  
While we talk about improvement in decibels in all our tables many other companies will state a single figure for their products which is often in excess of 40 or even 50db. It is really important to understand that these figures invariably refer to the performance of a whole floor ceiling structure, and this will include a standardised floor and ceiling that will already be quite well soundproofed. There is no single product in existence, to our knowledge that will provide in excess of 30 db when added to a standard floor ceiling divide ( plasterboard ceiling and wooden floor).  
In an attempt to level the playing field we are taking a standard ceiling 12mm plasterboard a void and 18 mm floor boards as our base case. We reckon that this has an acoustic performance of about 34 db rw ( airborne). The final column of our table gives an indication of we believe our system might achieve in Rw( simple airborne performance) terms.  
An important word about regulation E ( the sound test required for conversions) . We have a dedicated regulation E web site www.uksoundproofing.co.uk. The figures in the above tables do not take into account Ctr corrections so do not attempt to create an off the shelf solution for regulation E  

What do these dB numbers mean in real terms ?

What do these dB Figures mean in practical terms? In simple terms a 10dB improvement equates to a 50% reduction in sound you hear, 20db equates to 75% AND 30dB TO 87.5%. However this is not the same for all frequencies. This is just an average performance across all frequencies, and higher frequencies will perform better than lower. Learn More

More info when making a comparison of our products with others:

Please note that the figures that we provide refer to improvement over the average floor as opposed to the performance data of the product in isolation typically this is impact sound numbers).By this we refer to products that can be lab tested in a way that the product is tested on its own, which can give little indication how it performs in situ,(i.e. on your floor)

This is a very important distinction to understand and is confusing to a lot of people. Almost all our competitors will state the performance of the product either in isolation or include the existing floor construction within their numbers. This will exaggerate the true benefit of their products. For more information click here. This is particularly the case with laminate underlay's.

A Key to the table terms above? We compare the following key issues.

1) Floor height gain - How much floor height will rise as a result of soundproofing
2) Labour intensity - How long will the job take? In general lifting all the floor boards will add dramatically to the time required to complete the soundproofing you can think of lifting 3 of 5 boards ( see on line instructions for further details)
3) Typical Airborne uplift - This gives you an idea about how much airborne sound your stopping coming up from below ( or from above) TV / Talking that kind of thing. The bigger the number displayed the better the performance. THIS IS THE KEY THING to worry about if your soundproofing from neighbour noise downstairs
4) Typical Impact Uplift - This gives you an idea about how much impact ( footfall) sound your stopping going downstairs. The bigger the number displayed the better the performance. Again this is only important to you if your neighbours are concerned about your footfall.


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Acoustic Control :: Sound Insulation :: Domestic Soundproofing:: DIY Soundproofing