Can You Put Ice And Water Shield On Entire Roof

I am suggestion that they cover the entire roof with ice water shield.

Can you put ice and water shield on entire roof. Most manufacturers specify at least a 4 12 roof pitch for installing them meaning for every foot the rafters extend out from the ridge beam they drop down 4 inches. 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 on the secondary and less on the surface material. We do not recommend putting ice and water shield over entire roof.

Now if you live down in florida where hurricanes are an issue and shingles get ripped off of roofs and rain flies sideways on a regular basis down there typically they ll put ice and water shield sometimes across the entire roof. Also we do not recommend covering entire roof in ice and water shield as added leak protection. 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. However because the modified bitumen back surface is continuous these membranes can result in a vapor barrier.

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. Underlayment typical 15 tarred felt underlayment provides back up protection against water intrusion only as long as the primary roofing material. 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. So in our area of the country we typically only put this up to the first three feet.

Successful roof installations have been put on for centuries without ice and water. The roofer then said that we should cover the i w with a double underlayment. More and more ice and water is really being used for a lack of correct installation.