Install, repair, or replace built-up roofing, modified, and single-ply roofing systems, using waterproof sheet materials such as modified plastics, elastomeric, or other asphaltic compositions; sheet Metal Roofers will work with install, repair, or replacement of corrugated and standing seam metal roofing systems, gutters, downspouts, siding, soffits. Waterproof or damp-proof walls, roofs, by painting or spraying surfaces with waterproof coatings or by attaching waterproofing membranes to surfaces.