Q: When I work solo, snapping chalk lines to install roofing shingles gets tedious, and the line's hook often slips out of position. Is there a better way to do this job?
—Colby Wong, Brooklyn, N.Y.
A: When I'm laying out roof shingles or installing clapboards, I start by marking both ends of the wall or roof for the appropriate spacing. Then I drive finishing nails into the marks at one end, angling them slightly away from the marks at the other end.