Can You Put Ice And Water Shield On Entire Roof

However because the modified bitumen back surface is continuous these membranes can result in a vapor barrier.

Can you put ice and water shield on entire roof. From hud path best practices guide. If an ice dam occurs on your roof and water backs up under the shingles it will seep down into your home through the nail holes holding the shingles on and into your attic. More and more ice and water is really being used for a lack of correct installation. If i m using asphalt shingles i always protect the sheathing with ice and water shield first pulling it onto the fascia and rake boards and cover it with trim.

Also we do not recommend covering entire roof in ice and water shield as added leak protection. So in our area of the country we typically only put this up to the first three feet. The roofer then said that we should cover the i w with a double underlayment. Underlayment typical 15 tarred felt underlayment provides back up protection against water intrusion only as long as the primary roofing material.

A roofing material can be vapor permeable or the roofing assembly can be vapor open such as any type of shingled roofing which leaves gaps between layers. More and on the secondary and less on the surface material. I am suggestion that they cover the entire roof with ice water shield. Ice water shield is a thick sticky back underlayment also known as felt paper that will adhere to your roof deck and prevent water from seeping into your home if it gets under your shingles.

Potentially covering an entire roof with ice and water protector can prevent leaks even after high wind conditions blow shingles off the roof preventing further damage and making repair easier. We do not recommend putting ice and water shield over entire roof. Our roofer is reluctant to install comp on a 3 5 12 pitch as the national roofing association says 4 12 or steeper only.