Roof Valley Ice Water Shield

Install an underlayment centered in the roof valley.

Roof valley ice water shield.

If you have a roof that you know to be older than 1980 it won t have this great product under the shingles. 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. The ice and water shield is an amazing roofing product that was first introduced in the 1980s.

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. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Owens corning weatherlock and certainteed winterguard. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

After that time it quickly came to be used by most companies to create better roofing systems whatever the weather. We use this flexible self adhering barrier around critical penetration points on your roof such as chimneys roof to wall areas plumbing pipes valleys and lower pitched areas on the roof deck. Of the roof can be laced across roof valleys and up the adjacent roof a minimum of 6 or lapped 6 onto the membrane valley liner. In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table r301 2 1 an ice barrier that consists of a least two layers of underlayment cemented together or of a self adhering polymer modified bitumen sheet shall be used in lieu of normal underlayment and extend from the lowest edges of all roof surfaces to a point at least 24 inches 610 mm inside the exterior wall line of the building.

Some of the brands of ice water shield we commonly use. Eave metal figure 6 typical application of waterguard rain ice self adhering underlayment roof valleys waterguard rain ice is recommended to line roof valleys and application methods 1 2 or 3 can be used. If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. Grace ice and water shield roofing underlayment a registered trademark of gcp applied technologies is the name that contractors trust the most to protect their reputations.