Household Hints & Help

moisture thru the air (thus the roofing has expanding, blocking access for the water).

When there's no moisture/rain, the roofing 'wood panels' shrink a little thus allowing water to pass ... so this shows (1) don't have enough tar paper on the top surface (underneath the actual shingles, whatever you have on your roof) (2) I am surprised that you have that much 'give and take' on roof shrinkage. I wouldn't normally expect that much of a movement.

Maybe a humidifier too, to put more moisture into the air inside the home?

I remember when I had a leak, and it wasn't the roof, it was the moisture actually seeped through the mortar of my bricks in the home.

So a good tuckpointing job did the trick as well as waterproofing it afterwards.