Soundproofing 6m x 6m workshop

for optimum performance 4" gap should be allowed, studs should rest on silencing tape, same tape over the studs prior soundproofing plaster board installation, next standard PB but attached to blue one with acoustic filler, gap between the floor, wall and ceiling should be left around 6mm and filled with acoustic sealant eventually acoustic expanding foam,when plastering plaster should't have contact with original floor/wall/ceiling to eliminate bridging, between the joist acoustic rockwool, proper soundproofing wall should have 2 layers of studs where you can weave rockwool covering studs of the internal wall but without that it will do the work anyway
if currently there is no damp issue I won't bother with tanking/using membrane in there
you will also need ventilation to the room- if you know how to craft in the timber you can build external buffer (you are saving space at your garage) with extractor fan or negative pressure fan whatever you think will work better for you (I have done it in the past for recording studio and it worked for me

 

Hey josh, if you want to dig into the subject a good book I’ve read on the subject is this one on https://www.amazon.co.uk/Home-Recor...77&hvtargid=pla-619888124317&psc=1&th=1&psc=1home recording studios
Ive got a copy, I’ll post it out to you to read till you’ve finished the project if you want. Can you private message on this forum? Let me know your address if you want it.