Query: I’ve heard chlorine is good for cleaning roofs, but can it damage the shingles?
Context: The Asphalt Roofing Manufacturers Association recommends chlorine for cleaning asphalt shingles because it’s effective and does not cause harm to them. However, that’s not the case for roofs with slate or painted metal. WPW always makes sure to take the material into account so that we clean the roof properly without causing any damage or invalidating your warranty.