When you’re making sure your roof is safe from water penetration, it’s important to use the right materials in the right locations. In this article, FHB editorial adviser Mike Guertin describes his process for making sure a roof is protected from water infiltration by using self-adhering underlayment in vulnerable locations such as roof valleys, eave edges (to help deal with ice dams), rake edges, roofs to vertical walls (such as dormers), sidewall protection, the bottom of dormer valleys, and joints in sheathing. When working with self-adhering membranes, Guertin cautions that it’s important to work carefully and to adapt based on outdoor temperature, to buy the appropriately sized membrane for the job, and to get a strong bond so that the membrane adheres firmly to the sheathing.
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