New answers tagged sound-proofing
If you want to reduce the sound of footsteps, you should use a soundproofing underlayment (which is essentially a sheet of rubber). If you want to reduce other noises in the rooms, such as voices, TV, etc., then the insulation is a good choice. You should use enough to fill the cavity; if the cavity is 100mm thick or more, then the 100mm loft insulation ...
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