I’ve been considering a chainsaw retrofit over-roof with 6in of polyiso foam on the 4:12 roof deck of a 1970s house. One of the details I haven’t been able to… I’ve been considering a chainsaw retrofit over-roof with 6in of polyiso foam on the 4:12 roof deck of a 1970s house. One of the details I haven’t been able to…Read MoreGreenBuildingAdvisor

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