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Yes, roof cleaning is a necessary task. A clean roof keeps moisture from seeping under shingles, cuts down on decay, and can add 10 to 20 years to its life. Routine cleanings also sharpen curb appeal and let a pro spot loose flashing or soft spots before they turn into repairs that cost thousands of dollars. In short, a modest cleaning bill now protects you from a far larger roofing invoice later on.

If your roof is dirty, mossy, or covered in algae, start by washing your roof. In many cases, this is all that’s needed, but it’s also a helpful first step to uncovering any other issues. If your roof cleaning pro discovers missing, loose, or damaged shingles while washing, or if you notice that the flashing leaks, it may be time for repairs.

Plan on a cleaning every two to five years, but let climate guide your schedule. If you live in a damp, moss‑prone region, aim for the shorter end of that range; arid areas can wait longer. Sticking to a regular cadence keeps algae from eating into shingles and helps you avoid bigger repair bills down the road.

Schedule the job in late spring or early summer when daylight is long, temperatures are steady, and shingles are dry. A fall touchup after the leaves drop also helps you head into winter with a clear surface. Cold, icy conditions make cleaning risky and can trap water under shingles, so steer clear of freezing forecasts.