by Alex A. KecskesPest birds nesting on your roof can do a lot of damage. And with spring just around the corner, you'd better be prepared with an effective bird-proofing strategy.Whether you have a wood, tile or asphalt shingle roof, birds can cost you hundreds, even thousands in roof damage. In a surprisingly short time, bird nests, droppings and other debris can severely weaken a roof's effectiveness, causing it to leak and possibly even collapse. Imagine the water damage if that were to happen. The time to bird proof is now, before the spring brings flocks of pest birds to nest on your roof. After all, it's your home. Shouldn't you do what you can to protect your investment?Unless you live in a concrete bunker, the average roof is vulnerable to all types of birds. That's because most roofs offer birds an attractive place to nest and roost. Roofs also provide a safe perch from which to look for worms. In fact, many roofs offer birds a smorgasbord of insect snacks. When birds dig into your roof for insects, their beaks peck away at shingles and rafters. All this digging creates increasingly wider gaps where water can seep in during rain. Even if you have a stone or metal tile roof, birds often build their nests under these tiles, which can cause damage and leaks. Without effective bird proofing measures, roofs are vulnerable to pest birds and the problems they create.Incidentally, the acids in bird waste can destroy tar-based roofing materials and damage roof-mounted air conditioning equipment, attic ventilation turbines, skylights, solar panels, and solar water heaters. You need to protect your roof with a bird proofing strategy before pest birds arrive in the spring. Otherwise, it's hello birds, good-bye money.One highly regarded bird-proofing device is the tried and true Bird Spike. These spiked strips are blunted and safe for birds and pets; yet they're scientifically designed to deny birds a place to land. Bird spikes come in rigid U.V.-resistant unbreakable polycarbonate or high strength, durable stainless steel. Marine grade stainless steel spikes will last longer. And crush-proof, non-reflective spikes with a metal finish will blend in nicely on most types of roofs. You can even get bird spikes in several colors--including crystal clear, brick red, light grey, brown, black and tan. Plastic spikes can be used around dish antennas, since they don't interfere with TV signals. Bird spikes with a U.V.-protected polycarbonate base are recommended in inclement weather.If your home is near an ocean or lake, there's the Mega Bird Spike, which boasts long 7-inch spikes to deter seagulls, cormorants, turkey vultures and raptors. To keep pest birds out of rain gutters, there's the Gutter Spike, which typically comes with adjustable clamps at the base that attach easily to the lip of a gutter.