Hi, I have some damp joists at the front of the house, I think the vents have been blocked by cavity wall insulation.
It was done prior to me buying it, I wondered if theres a record of who did it and whether I would have any comeback ?
Also is there a way of clearing them from the outside, (they have very thin gaps) or would I need to get under the floor ?
(the house is tenanted and I would rather stay out due to the virus)
thanks