Step 1
Assess What Is Growing
We identify whether we are dealing with algae streaking, moss, lichen, or all three, and check valleys, flashing, and shingle condition.
Under this much tree cover the problem is usually more than streaking. Moss in the valleys and lichen on the shingles need solution and patience, never pressure.
Learn More About This ServiceMontgomery's tree-lined streets are the town's best feature and the reason its roofs grow things. Where a house in open sun gets black algae streaking, a roof under continuous canopy typically gets all three problems at once: streaking down the slopes, moss packed into the valleys and along the shingle courses, and lichen bonded directly onto the granule surface.
Moss is the one that costs money. It holds water directly against the shingle and works into the seams and under the courses, so the roof stays wet where it should be shedding. Lichen grips the granules hard enough that removing it carelessly takes the granules with it. Both are worse on north-facing slopes and anywhere overhanging branches keep sun off the roof entirely.
The method has to be low pressure. Shingle manufacturers specify solution-based cleaning rather than pressure washing precisely because pressure strips the protective granule layer and shortens roof life. We apply treatment, let it work through the growth, and rinse gently.
Under heavy canopy the moss in the valleys is usually the real problem, and it needs treatment that works through it rather than blasting it loose.
Moss traps moisture on the roof surface and works into seams and under courses, which is what actually shortens shingle life.
Lichen bonds to the granule surface. Solution-based treatment releases it without taking the protective layer along with it.
Low-pressure soft washing is the approach shingle manufacturers call for, and using anything harsher can affect warranty coverage.
Step 1
We identify whether we are dealing with algae streaking, moss, lichen, or all three, and check valleys, flashing, and shingle condition.
Step 2
Established beds around older homes are pre-wet and protected, and we plan where the runoff goes before applying anything.
Step 3
Cleaning solution is applied at low pressure and given time to work through moss, lichen, and algae rather than being forced off.
Step 4
The roof is rinsed at low pressure, landscaping is rinsed down, and we review the shaded slopes and valleys with you.
I have thick moss in the valleys. Can that be removed?
Yes, though heavy moss takes longer to release than algae streaking and sometimes continues to shed for a while after treatment as it dies back. What we will not do is scrape or pressure it off, because that damages shingles.
Will roof cleaning void my shingle warranty?
Not when done correctly. Manufacturers specify low-pressure, solution-based cleaning, which is what we use. Pressure washing a roof is what causes granule loss and warranty problems.
Should I have branches trimmed back as well?
It helps considerably. Overhanging limbs keep the roof shaded and damp and drop debris into the valleys, so trimming them back slows how fast the growth returns. We will point out which limbs are the problem.
Does roof cleaning need to happen before gutter cleaning?
Yes, roof first. Cleaning the roof brings debris and treated growth down into the gutters, so doing gutters first means handling the same debris twice.
We also offer roof cleaning in nearby communities. Choose another area below.
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Based in Cincinnati, we serve homeowners across Cincinnati and nearby communities.
Madeira
Loveland
Mason
West Chester
Liberty Township
Hyde Park
Pleasant Ridge
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