There are several different roofing materials.
Most roofs have a layer of plywood which is called the sub-roof, then have roofing material applied over top of it.
Some roof coverings are; Shingles- tiles- tin- tar and gravel- and rolled roofing over top of felt or what is called tar paper.
Most roofs have a layer of plywood which is called the sub-roof, then have roofing material applied over top of it.
Some roof coverings are; Shingles- tiles- tin- tar and gravel- and rolled roofing over top of felt or what is called tar paper.