How to keep birds away from the roof? When you look up, you may see the occasional magpie, pigeon or sparrow perched comfortably on your roof. Individually, these birds shouldn’t cause too many problems. They’ll likely fly away as soon as they see a predator or a source of food. However, if you see an entire flock of birds nesting on your roof, you have a problem.Despite their small size, birds wreak havoc on your roof. Their feathers clog your gutters and downpipes, increasing the likelihood of leaks. Their faeces contain acid strong enough to eat through many materials, including metal,...