sorry for the title, things are beginning to get to me...
So for my timber garden office I need the following vapor and breathable membranes but not sure what to use where:
FLOOR
floor joists (celotex in voids)>vapor barrier>chipboard floor>carpet
Do I just use a 1200 gauge polythene sheet here?
WALLS
Insulated PB (contains own vapor barrier)>Celotex>WPB>Breathable membrane>baton>Cladding
Not sure what breathable membrane to use here and what spec it should be?
CEILING (warm deck)
Joists>WPB>Vapour barrier>Celotex>Rubber membrane
Again not sure what spec or product to use on the roof, is it simply a 1200 gauge polythene sheet or does it need to be breathable?
Thanks once again...
So for my timber garden office I need the following vapor and breathable membranes but not sure what to use where:
FLOOR
floor joists (celotex in voids)>vapor barrier>chipboard floor>carpet
Do I just use a 1200 gauge polythene sheet here?
WALLS
Insulated PB (contains own vapor barrier)>Celotex>WPB>Breathable membrane>baton>Cladding
Not sure what breathable membrane to use here and what spec it should be?
CEILING (warm deck)
Joists>WPB>Vapour barrier>Celotex>Rubber membrane
Again not sure what spec or product to use on the roof, is it simply a 1200 gauge polythene sheet or does it need to be breathable?
Thanks once again...