Originally Posted by
Mr. 66
Does the patio wall come into contact with your garage? If there is a gap the patio wall probably doesn't have much to do with the moisture. Does water pool up between the two? I would be concerned about drainage You would eventually have wood rot on the exterior siding if there is inadequate drainage, then rot at the sill plate, then rot at the base of the studs.
Im wondering if you have a roof or siding slow leak. Even just an ounce of water in a slow drip can cause the circumstance that you mention.
No wood here. I don't live in the USA. Houses are built with bricks here
Jokes aside, I'm more worried about reinforced concrete beams rusting, but so far the wet spots appear below them, so my more immediate concern are my bikes,
The roof over the garage was rebuilt when we renovated the house as it had leaks. It was leak tested by inundating it and it worked, so the problem is not the roof.