The balance of the roof area is covered with synthetic underlayment that will not wrinkle when exposed to the sun.
Roofing felt vs ice and water shield.
Ice and water shield is also installed under shingle roofing when the slope of the roof is 3 in 12 and less.
The grace ice water shield 36 x 36 roll is another product that is recommend in areas that get more rain and snow.
Ice and water protector is part of a system working together to protect your roof including the shingles and other underlayments.
Once the high temperature ice and water shield has been laid down you can now add the second underlayment layer.
Roofing ice and water shield may look like traditional felt paper but it s vastly different in performance.
They can be installed over low slope roofing and are installed in plies.
The underlayment creates a secondary water barrier on the roof so leaks and water damage due to rain and storms are eliminated.
Traditional felt paper does a very good job at stopping most leaks where water gets.
Felt paper or tar paper is also a rolled material you see roofers nailing down under shingles.
Depending on the slope of the roof this product could be installed to cover the bottom 6 feet of the roof or with a very low slope cover the entire roof.
Such as 1 ply of peel an stick.
If the roof slope is below 3 12 pitch see our previous post on how to determine a roof s pitch the entire roof should be covered but only if the roof is conventionally vented cold roof construction.
Traditional felt paper does a decent job at stopping most leaks where water gets under shingles tiles metal or slate.
Ice and water shield is a far superior product compared to basic roofing felt paper.
The ice and water barrier is much slipper than roofing felt.
Peel and stick flat roofing products are both smooth surfaced base sheets and colored granulated cap sheets.
Grace ice and water shield fully adhered smooth surface roofing underlayment provides best in class roof leak protection against wind driven rain and ice dams.
What does felt paper do.
An ice and water shield is a totally impermeable membrane that prevents leakage through the roof in the event of an ice dam.
If you see ice and water shield being installed you might think it is felt paper.
The rubberized asphalt layer actually seals around roofing nails so they are totally water resistant.
It can be very dangerous when the new roofer is tearing off the old shingles and looses his or her footing on the ice and water barrier.
Ice and water protector membrane is a superior choice over roof felt for leak protection when properly installed and paired with the right products.
Felt is much safer.
Gcp invented fully adhered roofing underlayments more than 35 years ago.
