A 4 12 roof slope means the roof rises 4 feet for every 12 feet of horizontal roof span.
Ice and water shield roof valley.
All shingles removed from closed cut valley.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
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 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.
If the manufacturer requires the use of ice water i w in the valley because of the shingle type pitch of roof harsh climate area etc then i would use it.
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.
Help prevent leaks caused by wind driven rain and ice dams.
I have used it for years.
See the benefits of leak barriers.
November 19 2014 10 37pm 5.
Ice barrier underlayment installed in roof valley.
Grace ice water shield roofing membrane is used as an underlayment for sloped roofs to resist water penetration due to water back up behind ice dams or wind driven rain.
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.
Rise of the roof to the horizontal run and is expressed as a fraction.
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.
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.
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.
Entire width of new metal flashing properly extends over fascia at bottom of roof.
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.
Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.
