There are different options to choose from when it comes to underlayment. When it comes to safety, warranty, and most of all protection of your roof from the elements we recommend RhinoRoof.
-12 x Stronger than 30# felt
- Highly Recommended for steep roofs
-Slip Resistant walking surface
-Designed for use under asphalt shingles, synthetic shingles, and residential metal roofing and cedar shakes.