Hi all, At the moment I am erecting a concrete sectional garage onto the existing concrete garage floor. The purpose of the garage is not for the car but as a home cinama.  I know the proceedure regarding screeding and such to make the floor warm and level ready for the final covering (carpets) but I have a problem, the door that I am fitting is 81 inches tall (frame) and from the base of the garage to the top of the  wall plate that I will be putting on measures 82 and a half inches so I only have inch and a half for the screed and the carpet, are you with me so far. Apart from sand and cement screed is there any other method I could use to creat a warm sound floor.
Regards.
John.

Oh Bugger  Thats realey set me back I can't rip up the concrete and I can't lift the roof any more than I have, back to the drawing board then unless someone else has any suggestions

Thanks for the reply, I think it has a dpm If it hasn't what next, this may sound daft but if I was to lay down a layer of sand then visquene (is that how you spell it)  then a layer of polystyrene and finaly plywood (please don't laugh I'm doing this on a shoestring budjet,very little money at the mo) would this be plausable? Just to add, the room will be used for two and a half hours max at any one time and will be heated with oil filled rads in cold weather.
Regards .
John

Cheers CWatters.
Allready done that , but thank's anyway, I put a coarse of bricks down a built the sections on top to give me more head room when finnished but even with a wall plate at the back of the garage at 4 inches I still only have 82 and a half inches to play with and I can't put the door anywhere else.
Best regards.
John.

Cheers Keith, great help  I have been thinking, to put in place a 5 inch wall plate instead of four is feesable so I would then have 60mm approx of depth at the floor.
Again thanks for the advice on product recomendation.
On building regs, that is something  that worries me a bit simply for the insurance of the contents within the garage (approx £3500 worth of equipment) If i ever move I could always revert the garage back into a garage if you see what I mean.

30 I think,I will check it out. It's an 18 foot by 8 foot garage (pretty standard I think) just wondering how to calculate that to metric?

taken some advice from an AV forum I visit so I will probebly go along with this method.

Brick the garage door up to form your outer leaf (if it's only single storey you should be ok building straight off the concrete floor. The inner leaf I'd construct in timber frame (say 75mm x 50mm studs) like you suggested - but you'd need to keep it approx 50mm off the face of the outer leaf. Your vapour barrier would be between the outer leaf and the timber studs (to stop the insulation getting any moisture in it). pack the studs out in mineral wool insulation then put a breather membrane on top followed by the plasterboard sheets and a skim finish. There are lots of horror stories about timber frame constructions but they're all to do with not being built right - if it's done correctly then they're brilliant at keeping the heat in (Scandinavians use 300mm thick of insulation and most of the houses are built that way).The blockwork should be pretty good at sound deadening - where most sound transmittance occurs, it comes from gaps around doors frames especially the bottom - even those draught excluder brushes can be very effective as well as escutcheons over keyholes.

Woody, I didn't know Expamet made insulation  

We are a team, remember the screed cock up, if it hadn't been for you someone would be chest deep in the stuff