A shingled valley should last the life of your roof if done properly regardless if you have ice water shield under it or just 30 felt.
Ice and water shield roof valley.
I have used it for years.
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.
A 4 12 roof slope means the roof rises 4 feet for every 12 feet of horizontal roof span.
November 19 2014 10 37pm 5.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
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.
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.
See the benefits of leak barriers.
This grace ice and water shield self adhered roofing under layment covers 225 sq ft of roofing deck 36 in.
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 water shield underlayment also offers leak protection in trouble prone spots like valleys skylights protrusions and other flashing areas.
Grip rite eave valley protector provides additional protection against roof damage caused by ice and water.
Install beneath shingles along with areas where water may collect such as around chimneys valleys vents skylights or other similar areas.
I consider it to be the premium roofing water shield on the market especially for shallow pitched roofs that get a lot of snow and ice in the winter.
Roof slopes between 2 12 and 4 12 can use shingles but require roof application techniques to take into account a greater potential for ice dam water backup.
Rise of the roof to the horizontal run and is expressed as a fraction.
Help prevent leaks caused by wind driven rain and ice dams.
Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.
Get automatic lifetime protection on your entire gaf roofing system when you install any gaf lifetime shingle and at least 3 qualifying gaf accessories you ll automatically get a lifetime limited warranty on your shingles and.