In northern Wisconsin, where ice dams are common, we install these atop the underlayment to protect the entire roof from dams. Prevent Ice Dams The post A Full Guide to Metal Roof Installation ...

“Manufacturer specifications suggest that asphalt shingles last 20-30 years, wood shingles 20-50 years, metal roofing ... much longer than most other roof types. Underlayment: Underlayment ...