Roof Underlayment

Imagine a roofing underlayment you can install with regular roofing nails. That won’t tear easily or blow off the roof. That lies flat and stays flat, with a black surface that dries off quickly and shows chalk lines clearly.

Primus our premium synthetic roof underlayment, is among the safest, strongest, and best performing roof underlayments on the market. It balances strength and weight, provides dynamic steep-slope traction, and will not buckle, warp or crack.