Not soaking, but cardboard storage boxes, for example, lose their stiffness after a while and become limp (I know).
After an extension a couple of years ago, the loft is well insulated - about half has high mass acoustic fibre glass between the rafters and 70 mm celotex above, and the rest has two layers of conventional fibreglass. In excess of Building regs at the time. There is a bathroom fan that ducts through the ceiling to a false tile, but this seems to be leakproof and the loft door fits snugly in the hatch.
The roof is new. When the roofers were fitting the breathable roofing felt, they managed to rip it in several places before fitting the tiles. I pointed it out to them and i think they just put another layer of felt on top and then tiled the roof. There is no other loft ventilation.
I was wondering if this 'double layer' might be what is causing the problem? Or something else?
After an extension a couple of years ago, the loft is well insulated - about half has high mass acoustic fibre glass between the rafters and 70 mm celotex above, and the rest has two layers of conventional fibreglass. In excess of Building regs at the time. There is a bathroom fan that ducts through the ceiling to a false tile, but this seems to be leakproof and the loft door fits snugly in the hatch.
The roof is new. When the roofers were fitting the breathable roofing felt, they managed to rip it in several places before fitting the tiles. I pointed it out to them and i think they just put another layer of felt on top and then tiled the roof. There is no other loft ventilation.
I was wondering if this 'double layer' might be what is causing the problem? Or something else?