I used a few offcuts as pigeon proofing in the roof drains, as I had a bit left over from doing some work with it. Works well to keep the debris from going down and blocking the pipes, though the flying rats often use it as a convenient nesting platform, using assorted drinking straws and twigs. Easy to clean though, I use a scrap wire length to lift it up and dump over the edge of the drain, clearing out the nest eggs and all.