Will the algae damage myroof shingles?
It is an absolute certainty. In fact, the growth on your roof represents nearly ALL the cause of premature shingle failure. Those unsightly black stains on your roof are more than just a black eye on your homes appearance; it is damaging one of the most expensive components of many peoples biggest investment! And we are talking serious damage. A.R.M.A. (Asphalt Roofing Manufacturers Association) estimates that when left untreated, you can expect the life of your shingle roof to decrease by as much as 50%! A 30 year roof may last only 15 years. Algae, lichen and moss grows into the gullets (slots) of the shingles and along edges causing them to lift which makes your roof more prone to wind damage and leaks. The organic matteracts like sponges keeping the roof damp and perpetuating even more growth until it causes rot. The algae’s roots work their way through the shingles and into the wood decking causing serious damage. As algae feeds on the base of your shingle it willcontinue to grow
