As I have mentioned before, noise though party walls takes various forms and those which are loud are anti-social noise that can only be dealt with by outside authorities. From right now on we will talk about ordinary levels of sound such as chatting that shouldn't be read during the day. Assuming it is normal levels of noise that will need to be dealt with we've to additionally think of flanking noise. Now flanking noise is noise which often skirts around the gathering wall surface via the hollow areas beneath floorboards and also above the ceiling. With pre-war buildings these are commonly the only areas which can be treated to greatly reduce flanking noise transmission because you will find not any cavities in the structural wall space that would normally let the no cost transmission of noise. Chimney breasts and internal attached walls are other areas which can enable flanking noise but are generally impractical to effectively soundproof.
Firstly we will deal with pre-war houses as well as flats that often have solid structural walls which usually do not require extra treatment. This means the floor and ceiling and these need to be treated before doing almost anything with the party wall structure to lessen flanking noise in those spots. With the floor it will be necessary to lift the floorboards closest to the party wall and insert between the joists immediately adjacent to the wall Acoustic Mineral Wool. If the joists are reliant on the party structure then install adequate to coat 1200mm from the wall and along the place between the joists. If, on another hand, the joists are parallel to the wall structure, then simply put in the acoustic mineral wool in the area between the first and foremost 2 set of joists and then swap the floorboards and screw them down. Once refitted, overlay with 2mm of SBM5 soundproofing mat which is going to seal up the joints belonging to the floorboards.
Precisely the same infill treatment by using acoustic mineral wool should be carried out on the ceiling but in case it is a top floor bed room ceiling there might be thermal insulation between the joists and it's not wise to remove it. The ceiling itself is generally upgraded with an extra level of 15mm high density acoustic plasterboard that will add mass and thus help the audio blocking functionality of the ceiling. Now the floor and ceiling have been acoustically treated we can examine what may be completed to soundproof the party wall and I will cover this in my next post. In the meantime if you're looking for any additional information on the way to soundproof a party wall visit our web page via this hyperlink soundproof a party wall. Party Wall Surveyor Whitstable
|