I have a flat warm room on my detatched newbuild garage.
from bottom to top it has: NOTE the ??????? needs a a control barrier but does it need to be the breathable type or weatherproof type.
Plasterboard
Roof joists
18mm Ply
??????????
Celotex Insulation
18mm ply
Sarnofil Membrane
from bottom to top it has: NOTE the ??????? needs a a control barrier but does it need to be the breathable type or weatherproof type.
Plasterboard
Roof joists
18mm Ply
??????????
Celotex Insulation
18mm ply
Sarnofil Membrane