Ice and water roof membrane in Zone 5
Building a one story barn/ranch home in Northern CT Zone 5.
Getting close to installing the roof in a few weeks and my framer
told me to get Ice and Water that is granular and not the IW that
is smooth. He said in the winter it hardens and becomes brittle.
On my previous builds I used Grace Ice and Water and it seemed
to be pretty sticky and I would do the entire roof. This roof is just a regular
12 pitch long roof which is simple with no dormers or complicated areas.
The sheathing will be 5 ply CDX 5/8 4×8 – roof trusses are 24 OC and I am 90% close cell spray foam will be sprayed under the roof decking. I like the idea of Grace on the entire roof as added insurance as I wonder if it is hard to find a leak when under the roof decking is sprayed foam.
Do some installers put the granular on the most outer 3 feet and then switch to smooth? In a climate where the winters are very cold with 40 pound snow loads, what would you do? I am also doing asphault – not metal.
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