well im just a spark but ive seen this done;(i remembered as it caused me problems)

2*2 off wall with fiberglass insulation, followed by 12mm plasterboard, followed by 3*2 celotex and double skinned 12mm plasterboard, done on all walls and ceiling, floor was done with celotex and screeded over it.

(celotex is a solid insulation board about 2 inches wide)

and the door was specialist sound proofed, the only thing that cost a bomb was the door....

caused me a headache because all cables have to be bigger because of the insulation preventing them from disapating heat- this would be my only concern if you have any  to enclose in the lining...

ss

p.s. welcome to the forum  

I frequent a guitar forum and the subject of 'home recording studio' comes up time and again.

From all the posts I have ever read on this subject I have to agree with Robbo that half measures will not work and to do it properly is NOT cheap. The house I'm currently working in has heavy soundproof matting under the loft conversion carpet, customer reckons this cost £3,000 for an area 6.6m x 9mm approx!

There are books available on how best to achieve a 'soundproof' room as there are many ways (and budgets) to achieve this and many methods depend on what type of room you are starting with. Do a Google search, something should come up.

Hi Ray

I have just finished (well at last Christmas actually) a very similar project.

I built a room within a room in a detached brick garage for my son's band to practice in.

The basic construction was to build a internal room out of studwork leaving a gap of about 8" between the inner room and outer brick wall.

The studworek was filled with 100mm of RW3 rockwool and then faced with 2 offset layers of plasterboard (12.5 & 15).  This was then skimmed.  I put new rafters above the existing trusses and used these to strengthen the trusses (using joist hangers) so that I could put the two layers of plasterboard on the ceiling.

The floor was a layer of 25mm ecotherm with 18mm chipboard on top.

I paid special attention to the door by buying two fire doors (therefore solid) and fixing them together with a sandwich of plasterboard.  I also bought special acoustic seals to go around the door.

The upshot is a room in which my son can practice his drumming at midnight without it dusturbing us and a four peice rock band can play without it being a problem.

We do live in a rural location and don't have close neighbours so we didn't nead absolute soundproofing.

Total cost was about £3000 (including plastering, lighting and carpet) for a room which is 5.5m x 3m.

I can send you a few pics if you are interested.

Cheers

Martin

blimey for the money that will be needed it might be worth investing in an electric drum kit like this

http://www.vdrums.com/vspecs.html

these kits are not cheap but play like "real" drums with the advantage of a volume control

these things have come on a long way in the last few years and are a world away from the old rubber mats

the TD8 is a fine kit to start with and can be expanded on. they are about £2-3k , like i said not cheap by any means but probably a lot less than trying to soundproof the room

I used http://www.customaudiodesigns.co.uk/seals/adhesive.htm around sides and top of door and http://www.customaudiodesigns.co.uk/seals/thresholds.htm (HL seal) at the bottom.

I haven't had time to sort out pics yet but will do as soon as possible.

Cheers

Martin