I don’t even now where to start with Loft conversion and the benefits on the overall home sound proofing theme. The results are staggering. Because we use thick insulation on the trusses, and in the beams under the floor as well, the room itself acts as the air gap, much in the same way as a double glazed unit works. Now it’s not quite as efficient as that because the area is not air tight, which is what really gives an air gap super qualities in the sound proofing department. It certainly is super effective though.
Let’s talk a little about the process of loft conversion. Firstly you will gain building regulation approval to convert your loft. Maybe you won’t but it certainly will not go unnoticed by your neighbours and if you have do gooders it really will not go well for you. Sadly some people cannot mind their own business and what you do in you own home, that has no bearing on them, other than improving the environment, they feel the need to throw themselves into your affairs. Perhaps then their life is just so empty, they having nothing better to do? Rant about loft conversion do gooders over. Once you have approval or not, you will strip out the loft and also removal the old insulation from the joists.
Once the loft is gutted it is a case of making sure all your wires and plumbing is neatly contained within safety conduit. Do not skimp on this. You don’t want an electrical spark or heat catching fire in the loft. And make sure you have no leaks, undoing the hard work would be heartbreaking.
Then you can go about install the insulation back into the floor joists and into the trusses of the roof. This can be temporarily fixed before cladding or paster board is attached. Personally I never bother. I will screw on a few pieces cladding and then offer in the sound insulation. The screw on a few more and the friction of the tight fit combined with a couple of pieces of cladding will hold it all fast while you continue to clad the loft.
Then the floor we will typically install a cheap chipboard at 50cm centres. This provides an adequate base for futher flooring or can be used as is. Personally I think the best thing to do is cover with a cheap carpet as in the even you need to change wiring or have a leak it is all very easy to get to. If you tile your asking for problems, however nice it looks.
That’s a few basics, there is also the possibility the loft has a sash window and in this instance you might want to double glaze that sash window and add a comprehensive draught seal. There is little point uprating everything else and then ignoring the windows after all.