ROOFING FELT

  1. Roofing felt (similar to tar paper) is the base material used to make roof shingles and roll roofing. Typical uses of felt paper are as an underlayment beneath other building materials, particularly roofing and siding materials.
  2. Tar paper. Installed under the roof shingles. Normally 15 lb. or 30 lb. 

Example

The crew put roofing felt down when fixing the roof.