Roofing Felt Vs Ice And Water Shield

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. An ice and water shield is a totally impermeable membrane that prevents leakage through the roof in the event of an ice dam. The ice and water shield is an amazing roofing product that was first introduced in the 1980s.

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If you have a roof that you know to be older than 1980 it won t have this great product under the shingles.

Roofing felt vs ice and water shield.

This ice water shield is applied as an underlayment prior to putting the shingles on the roof. Not all roofing underlayments are the same. 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. Item 169827 model 5003002.

It is a common look out for the next time the roof needs to be worked on. 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. I always install the felt above the ice and water barrier. The rubberized asphalt layer actually seals around roofing nails so they are totally water resistant.

Ice and water protector sometimes also referred to as ice and water shield is a waterproof roof underlayment membrane developed to protect vulnerable areas on a roof from ice and water damage. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen. Once the high temperature ice and water shield has been laid down you can now add the second underlayment layer. The underlayment creates a secondary water barrier on the roof so leaks and water damage due to rain and storms are eliminated.

The ice and water barrier is much slipper than roofing felt. An ice and water shield is a great roofing product to create leak free roofs. Gcp invented fully adhered roofing underlayments more than 35 years ago. The grace ice water shield 36 x 36 roll is another product that is recommend in areas that get more rain and snow.

This ice shield seals nail holes better then regular tar paper roofing materials. Grace ice water shield 36 in x 75 ft 200 sq ft rubber roof underlayment. Roofing ice and water shield may look like traditional felt paper but it s vastly different in performance. Felt is much safer.

Traditional felt paper does a very good job at stopping most leaks where water gets. 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.