Garage conversion

[jamiedl]

Hello everyone,

I've got a few questions re: garage conversions i hope you can help,

1. When the new joists are laid straight on the slab, are they screw fixed to the slab?
2. Should i lay a dpm below the joists?
3. I noticed on the drawings timbers referred to as sw and wpd, i take it as softwood and something something drywood? Can anybody tell me what the difference is and when you should use drywood as oppose to softwood?

Thanks very much

 

[noseall]

yes, to fitting dpm under the floor joists.

how deep are the joists?

don't know about wpd though.

 

[jamiedl]

Thanks noseall,

Joists are 100x50's.

 

[noseall]

you would be better off fixing a 100 x 50mm joist down each wall then skew fixing the remaining joists between these.