Roof Valley Ice Water Shield

Years ago when ice dams caused lots of leaks it was recommended to put on a 3 foot strip of ice and water shield rubber like membrane along the bottom edge of the roof to prevent water ice dams.

Roof valley ice water shield.

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. 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. 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. 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. Install an underlayment centered in the roof valley. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.

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. 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. 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. 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.

Some of the brands of ice water shield we commonly use. 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. If you have a roof that you know to be older than 1980 it won t have this great product under the shingles. Owens corning weatherlock and certainteed winterguard.