Moss and Algae on Your Roof? Here's What Actually Works

Those dark streaks running down a roof are usually algae, and the green patches near valleys and shaded edges are moss — both feed on the same moisture that gets trapped under shingles when they are left alone. Over time that trapped moisture shortens the life of the roof, not just the way it looks.

A standard pressure washer is the wrong tool here: the force that strips a driveway clean will also strip granules off shingles, which shortens their lifespan even further. A low-pressure soft-wash treatment kills the moss and algae at the root using the right solution and a gentle rinse, without touching the shingle surface itself.

Roof cleaning is one of the cheapest ways to add years back to a roof that still has good life left in it, and it is one of the most noticeable exterior upgrades a home can get — often visible from the street before you even reach the driveway.