The True Purpose Of Underlayment
Provides an extra layer of protection between your roofing shingles and roof deck
Prevents wind-driven rain...
(or water from other sources) from infiltrating under your shingles and causing damage to your roof structure or the inside of your home
Provides an extra layer of protection...
Between your shingles and your roof deck
And will not buckle when installed
Helps reduce blow-off...
By allowing your shingles to lay flatter and more uniformly