- Boston University (Boston, MA)
- …and repair existing built-up roofs and single-ply roofing systems + Install protective roof coverings + Cover roofs and exterior walls with roofing and waterproofing ... using a knife. Fasten composition shingles or sheets to roof with asphalt, cement or nails. Punch holes in...into the angles formed by walls, vents and intersecting roof surfaces + Install sheet metal (prefabricated) such as… more