I need a new roof on my 1962 vintage home.
One bidder says they will install 3′ of Grace ice and water shield around the lower edge of the roof. Another says 6′.
I looked at the Grace web site and it says to base the amount you use on a number of different variables including climate, slope, degree of ventilation of the roof space, etc.
We’re located in southeast Wisconsin and winters can bring a good bit of snow. The house has overhangs that vary, but some are up to 30″. The pitch is not too steep to walk on and I believe that it’s pretty well ventilated (ridge vent is in place now and there are a number of soffit vents).
Any recommendations? I’m even wondering if 6′ is enough.