Installing an ice and water shield membrane on a 3/12 pitch roof is not just recommended; it is typically mandated by modern building codes and shingle manufacturer specifications. Because a 3/12 slope has a very gradual incline, water flows down slowly, creating a high risk that wind-driven rain or melting ice dams will back up under traditional shingle laps and cause major interior leaks. Covering the entire roof deck or vulnerable eave sections with a self-adhering waterproof shield provides vital protection against moisture infiltration.
1 votes
Marked as accepted