4. Wash Your Roof
A key piece of advice when it comes to maintaining a shingle roof is to wash it. At some point, your roof will start to look dirty, with long, dark streaks flowing from peak to eave. This is algae growing on your house. Algae won’t cause any immediate damage, but if you leave it long enough it can slowly rot your shingles.
To get rid of these little plant-like critters, spray your roof with a 50 percent mix of water and bleach. The bleach will kill the algae fairly quickly, but you’ll also want to install copper strips just beneath your roof’s peak. When it rains, the copper molecules will stream down your roof, killing any algae fixing for a comeback.