summer house damp

I aked this question on reddit but it was suggested I sign up to this forum as there are far more experts on here so here goes! I've been asked to paint the outside of an elderly relative's summer house .It looks to me like it's never been painted and appears to have some kind of dampness or...

Hi, We recently bought a new summer house and now that the heavy and windswept rain is upon us there's damp coming through on the corners and also bottom edges. I've sealed the narrow spaces on the outside joins with a weather sealant but still the corners are showing damp. I wonder if this...