A layer of synthetic fibers, usually polyester, bonded to the underside of a single-ply waterproofing or roofing membrane. The fabric provides a textured surface that grips liquid adhesives or hot asphalt much better than bare plastic or rubber. It also acts as a cushioning layer over rough substrates and prevents chemical migration between incompatible materials.
Heard on the job
We're using a fleece-backed PVC so we can adhere it directly over the old asphalt roof.
Insider tip
When welding fleece-backed membranes, you must ensure the fleece does not get pulled into the weld area, as it will compromise the seam.
Also heard as
- fleece backing