sentence: A roofing commercial demonstrates how to fix a slate roof on a house. sentence:   A man cuts parts on a folding table outside and then installs a slate on a roof using power tools and tools from his tool belt. sentence:   The man installs copper pieces to the slate roof that protrude from the roof. sentence:   The man then cuts a copper pipe and does some soldering to the edges of a hole in the copper pipe before the camera cuts again to the roof and then a marketing graphic.