Finally, roofers cover exposed nailheads with roofing cement or caulking to prevent water leakage. Some roofers work on both flat and pitched roofs while other roofers specialize in one type. In addition to repairing roofs, some roofers also waterproof concrete walls and floors. They start by removing any rough spots from the area to be waterproofed. They may do this by using a hammer and chisel or by rubbing the area with a rubbing brick.
Next roofers apply the waterproofing compound.
The compound may be painted, sprayed, or tacked on. Roofers is in the Building and Construction Career Cluster.