soundproofing a ceiling

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SOUNDPROOFING A CEILING

If modern houses and flats are built using the correct materials, they should be insulated against normal noise nuisance from neighbours.  However, loud noise produced from stereo systems etc. will always be heard and is more of a nuisance at night when other daytime background noises have ceased.  Apart from the airborne noise nuisance already mentioned, impact noise from above is often caused by footfalls and furniture such as chairs being moved.  Both of these domestic noise problems can be reduced by installing a separate ceiling beneath the existing (if height allows).  To gain the maximum reduction in noise nuisance from above, a separate ceiling installed on new joists beneath and completely decoupled from the existing ceiling and supported by wall mounted joist hangers will give the best results.  The joists should be infilled with a 100mm of our Acoustic Mineral Wool (AMW100) and clad with 25mm of 12.5mm thick high density acoustic plasterboard.  This method can only normally be installed into Victorian houses with higher than average ceilings.

Alternatively, a good DIY soundproofing solution is to remove your existing ceiling and install 100mm of our Acoustic Mineral Wool (AMW100) between the floor joists.  Our sound reducing Resilient Bars can then be screwed to the bottom of the joists to decouple the 30mm of acoustic plasterboard (2 x 15mm) screwed to the bars as shown below.

More usually, and if height allows, good DIY soundproofing can be achieved by screwing 50mm timber studs directly to the old ceiling being sure to fix through to the joists above.  Ensure there is enough electrical flex for the new light fitting in the ceiling beneath and seal the hole through the old ceiling with mastic.  Infill with 50mm of our Acoustic Mineral Wool (AMW50) before screwing our Resilient Bar system to the battens.  30mm of acoustic plasterboard is then screwed to the Resilient Bars with 1mm of SoundBlocker Membrane sandwiched between them.  See the image below and our Resilient Bar  page will give you more information.

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