Begin from the bottom of the roof and work up.
VersaFrame Inc. offers a synthetic underlayment constructed from high strength woven fabric that is polypropylene coated on both sides.
The specially formulated anti-slip surface is asphalt free and is 2-1/2 times lighter per square foot and 25 times stronger then #15 felt.
Synthetic underlayment comes in a 25 year or 50 year warranty and has a 180 day UV resistance.
Sq.ft / Roll
Underlayment Stock Sizes