Kingspan with the silver side up, to the warm side.
Yes spillages would be very occassional so they would dry up (unless there was a sink nearby)
But I do think that kingspan wouldnt seal all the gaps at the joists and air currents/ draughts would find ways from the room downwards and as they pass the joists would condense water and this would happen day after day and rot the wood.
[g]
You seal the Kingspan/Celotex in with squirty foam. Ideally the low- expansion waterproof stuff that's used for doors and windows.
Regards Richard
Sorry - meant the joists. Timber gets very much more expensive in long lengths.
16 ft..i think my 12 " square green oaks 6m long were a couple of hundred each.
VERY rough sawn.
Probably double that for seasoned wood, but you wouldn't get 12" sq seasoned..it would split.
Work on 40-50 per cu ft rough cut and seasioned.
geraldthehamster coughed up some electrons that declared:
I found Siroflex foam adhesive (branded as drywall glue) quite good. Still PU foam, but only 2x expansion and very sticky! Still have the T-shirts to prove it!
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