Rain gutters take a lot of abuse: rushing water during rainstorms, exposure to weather extremes, heavy loads of snow in the coldest climes, clogs of fallen leaves, and the general ravages of time.

Q: When I had a new roof installed, the roofers lined up the shingles with the edge of the metal drip edge instead of overlapping the drip edge by one-quarter inch in the standard fashion. As a result ...