Ice water shield acts as a vapor suppressor so it not only keeps the water out but also keeps the moisture in.
Ice and water shield entire roof cost.
Cons of installing ice and water shield on your roof.
But it costs the customer more money without adding any real value and has the potential to create long term durability problems.
Ice and water shield on the entire roof deck.
I have used it for years.
Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.
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.
I am putting on a new roof and got two estimates about equal in price.
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.
This grace ice and water shield self adhered roofing under layment covers 225 sq ft of roofing deck 36 in.
Stephen eggerman posted in general questions on january 2 2011 11 03am i see this happening in northern new hampshire.
I just recently asked grace about this.
The situation was a slate roof on a 120 yr.
Old brick firehouse currently used for dead storage by the town i think one small room is heated but not the whole building.
The only real negatives of covering your entire roof with ice water shield are 1 cost and 2 potential ventilation problems which are very rare.