Q: I would like information on putting on a sod roof. Do you have information or good sources that I can look up?

— Gloria, Cook, MN

A: Tom Silva replies I've never done a sod roof, but you're biggest worry will be moisture. Make sure you install waterproofing (like an ice and water shield) that prevents condensation inside the house, and insulate underneath the roof with the foam insulation. Taking these steps will create a thermal break and keep heat and cold from being transmitted rapidly, which can cause condensation, or even leaking or ice dams.
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