This repeated movement of the sheathing often causes nails to slowly work their way out of the sheathing and rafters/trusses below. The nail head can literally move up enough to slightly puncture ...

Reason #2: Your shingle’s nailing technique is wrong. Not only is layout of your roof’s shingles important, but you also need to use proper nailing technique.

It has a peel-away backing paper, and this material sticks to the wood sheathing. What is it? ... Roofing ice and water shield is better than felt. Updated: Dec. 16, 2010, 5:09 p.m.