I can see there are quire a few posts already on this subject and I've had a good read to see if there is anything obvious. I've checked the eaves are not blocked and the hatch is sealed well. Extractor hoses look good. I use a dehumidifier when drying clothes in the winter and try to ventilate the house as much as I can. But it does tend to run a bit on the high side. Currently 70% humidity upstairs at 15 Celsius.
It's a detached house and the eaves are shielded both sides by neighbouring properties so I can't feel much air flow in the loft even when it's blowing a gale outside. The insulation is damp to the touch and covered with black marks. Don't have a water tank as have a combi now. Central raised platform which used to hold water tank is used for storage. Boxes are fine, not damp or mouldy at all. It's just the insulation that feels damp. loft smells pretty bad too. I had birds in there a few years ago but had the corners patched and cleaned up the droppings and bleached the area so I don't think it's that. Smell is worse towards a waste pipe that vents in the loft. Could this be the cause of the problems? I went up there yesterday and took a few pictures. I think this is an air admittance valve on the end. Could that have failed? Looks like some leaking below but it is just surface and hasn't come through the ceiling that I can see. Nothing visibly dripping or anything like that. I would like to have the loft reinsulated but before I do I want to resolve the condensation problem. Any ideas gratefully received.
It's a detached house and the eaves are shielded both sides by neighbouring properties so I can't feel much air flow in the loft even when it's blowing a gale outside. The insulation is damp to the touch and covered with black marks. Don't have a water tank as have a combi now. Central raised platform which used to hold water tank is used for storage. Boxes are fine, not damp or mouldy at all. It's just the insulation that feels damp. loft smells pretty bad too. I had birds in there a few years ago but had the corners patched and cleaned up the droppings and bleached the area so I don't think it's that. Smell is worse towards a waste pipe that vents in the loft. Could this be the cause of the problems? I went up there yesterday and took a few pictures. I think this is an air admittance valve on the end. Could that have failed? Looks like some leaking below but it is just surface and hasn't come through the ceiling that I can see. Nothing visibly dripping or anything like that. I would like to have the loft reinsulated but before I do I want to resolve the condensation problem. Any ideas gratefully received.
