Ice And Water Shield Over Whole Roof

Asphalt shingles are a little bit permeable in windy conditions but not very.

Ice and water shield over whole roof. Now ice and water shield is designed to stop ice damming or water that backs up say from your gutters and getting into the roof surface. The zip system sheating that you see on a lot of new houses now has an impermeable layer applied to it so that water will not get thru. It can protect your home from water leaks caused by ice dams and wind driven rain. Ice and water shield is a great product that can be used in spots to protect the most vulnerable areas of your roof or as a whole roof underlayment to protect from ice dams water dams storms and leaking in any area of the country and any weather.

Both products have a separate purpose. I would completely i w then a synthetic over it. Ice and water shield is a thin rubberized asphalt membrane that goes beneath the shingles of your roof typically only along the overhangs and in the valleys. It s typically only installed on the first leslie.

Tamko s instructions say you can go as low as 2 12 as long as you do 2 layers of underlayment or i w over the whole roof. Other types of roofing including cedar shingles and concrete tile roofing are fairly permeable. Many types of roofing including epdm and standing seam steel roofing are virtually impermeable to water vapor. You should seriously consider using ice water shield if you live in ice dam country.

Covering the entire roof with ice water is no different for the wood breathing than covering the entire roof with metal roofing. 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. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen. 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.