Michael,
Eric pretty much nailed it.
It is not usually worth it in my opinion and especially given the nature of most leaks and the condition of most sheathing.
Roofs aren't cheap so I think the mat ... read more
Verify that all window and door seals/weatherstriping is in good shape.
Check to be sure doors and windows are caulked properly (no gaps, cracks or missing).
If you have an attic access, treat it like ... read more