Was there an animal in there? I ran outside, looked up at my roof — and saw a woodpecker drilling away at my metal chimney cap. I've seen and heard plenty of woodpeckers hammer on trees.

Products include chimney liners and chimney caps; stove pipes, black stove pipes, double-wall pipes, and triple-wall pipes; and pellet vents and direct vents. Chimney liners are made of clay tiles or ...