When I repaired a deck, I decided to put a strip of 15lb tar paper over the joists before attaching the deck boards. The tar paper was about 1/2" past the edge of the joist, and then lightly folded down to form a drip edge. My theory is that the tar paper will tend to run rainwater away from the joists, and drip it slightly away from them, extending their life. Any opinions out there?
- posted
15 years ago