Ice and water barrier is a self adhering rubberized membrane that protects your roof from leaking due to excessive water conditions.
Water and ice proctor roof.
When installing a new roof or replacing the old one consider adding a water repellent membrane such as ice and water shield underneath the shingles.
Live in a climate with brutal winters where your roof is prone to ice dams and leak damage from wind driven rain and snow.
In areas where there has been a history of ice forming along the eaves causing a backup of water an ice barrier that consists of at 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 the roof surfaces to the point at least 24 inches inside the.
There are several areas of your roof especially susceptible to the water penetration that ice and water barrier will serve.
One person can install long lengths of ice and water shield to the roof however it is easier for two people to install especially with some new installatio.
And this is where the confusion.
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.
Some codes require a membrane at the eaves extending 2 inside the exterior wall line as an ice dam precaution.
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.
Water repellent membrane ice and water shield this product will not prevent ice dams from happening but it will help minimize the damage by shielding the roof deck.
The leading self adhered roofing.
But with a well insulated and well air sealed attic with good soffit to ridge ventilation and no valleys or dormers to collect snow and block ventilation ice dams should not be a problem.
The snowmelt freezes on the overhang creating an ice dam and then the melted water backs up into the warmer roof area doesn t freeze and seeps into your home.
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.