Floor Solution 2
Acoustic joist caps with high density " Mute boards"
A very cost effective method of reducing impact sound while improving airborne soundproofing as well.
If your looking to reduce impact sound while maximising airborne sound reduction with minimal floor build up we would recommend acoustic caps over the tops of each joist. Then replacing your existing walking surface with Muteboards ( cement impregnated chipboard 18mm). This option will keep to a minimum floor height increase.
With this solution we are attempting to maximise the mass of the floor to reduce airborne sound transmission while dramatically improving the foot fall sound being generated from the floor. Coupling the resilence layer provided by the acousitc joist strips and the high density of the Muteboards is a powerful combination in reducing airborne and impact sound transmission.
Acoustic joist caps are unsuitable to use under floorboards, which need mechanical fixing ( see solution 3). This solution is creating a floating floor. In terms of impact attenuation achieved and cost and ease of fitting this solution it offers a cheaper and more effective alternative to solution 3 which incorporates the use of expensive metal hangers.
Solution 2a- Incorporating cement impregnated Muteboards
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Solution 2b- Using regular chipboard upgraded with Tecsound 50
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Key Features of Joist cap
Length |
2.0m |
This product, used upside down, can also provide the resilient layer required for customers to make up their own resilient battens. We recommend 50 by 100mm battens
If the product is used in this manner, on a concrete floor, impact improvements in the order of: :
Delta L w22dB with a standard batten
Delta L w24dB with a deep batten can be expected.
Robust Details only require an improvement of Delta L w17dB
If the product is used in this manner, on a timber floor, improvements in the order of:
Delta R w+C; tr14dB and
Delta L w20dB can be expected.
Robust Details only require an improvement of:
Delta R w+C; tr13dB and
Delta L w15dB |
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Dimensions |
50mm x 50mm x 50mm |
Thickness |
12mm |
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Acoustic floor treatments compared |
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Remember the higher the impact uplift the better you will protect your neighbours from your footfall. |
What do these terms all mean? 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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Fitting Instructions
