1.   First there was asphalt, which was like putting roof shingles on walls.

2.   No use putting fancy shingles on a roof that is out of sight.

3.   Or, they are putting new shingles on roofs termed hopeless, from excessive damage or plain old age.

4.   Q. I want to put shingles over old clapboards on the third-floor exterior walls of my triple-decker, where the clapboards are at their worst.

5.   Putting shingles over clapboards is easier because the height of the shingles spans several clapboards, about four of them.

6.   Q. The previous owner put shingles over the old clapboards, which are nailed on open studs.