Roof Cleaning in Macomb Township
Black streaks on a fifteen-year-old roof are the most visible flaw on a township street, because every other roof on the block is the same age and half of them have not streaked yet. The streaks are algae, they are alive, and a soft-wash roof treatment kills them without a drop of pressure on the shingles.
The township's roofs are architectural asphalt shingles installed with the houses, which puts most of them between five and twenty-five years old, in light and medium grays and browns that show a dark stain early. The streaks are Gloeocapsa magma, an airborne algae that feeds on the limestone filler in the shingle and spreads downhill from wherever it lands, usually the north slope first. The colony holds moisture against the shingle and shades it, which is the part that shortens roof life, and it sheds into the gutters as a black film. Lichen and moss follow in shaded spots, and they root into the granules.
Most of the township gets full sun on its roofs, so the algae starts later here than under the canopy in Clinton Township or Shelby Township, but the open sky also means a streaked roof is visible from three streets away. In a subdivision off 23 Mile or 24 Mile, the streaked roof is the one you can pick out from the entrance. Associations notice. A roof streak citation is a common line on township exterior notices, right after siding, and it is one of the easier ones to close because the treatment is a single visit with a before-and-after photo pair.
The method is soft washing, the same chemistry the shingle manufacturers describe: a sodium hypochlorite solution applied at low pressure from the roof edge or a ladder, left to kill the growth, and either rinsed gently or left to rinse with rain. No pressure washer touches the roof. The streaks fade over days to weeks as the dead algae weathers off, and the treatment holds for several years. Roof treatment starts at $450, and it bundles well with the house wash and gutter cleaning on the same visit.
The Treatment, Ridge to Eave
Before anything goes on the roof, the gutters are checked and the downspouts are diverted so the solution does not discharge onto the lawn, and the beds below the eaves are wet down and covered where needed. The crew applies the solution with a low-pressure pump from the roof edge, ridge to eave, keeping it off metal flashing where it can, and lets it dwell. Heavy streaks get a second application. Then the roof is either rinsed at hose pressure or, on hot days, left for the solution to finish and the next rain to carry the residue off. The gutters are flushed at the end, the plants get a final soak, and the photos are taken from the street where the streaks showed.
How Roofs Get Damaged Being Cleaned
Pressure, in one form or another. A pressure washer on asphalt shingles strips the protective granules off in a single pass and can cut the roof's remaining life in half, which on a fifteen-year-old township roof is a costly trade for a cosmetic fix. Walking a steep roof without protection scuffs it and is unsafe. The second failure is a cleaner that bleaches the streaks white but does not kill the colony, so the streaks are back by the following summer. The third is letting the runoff reach the foundation plantings undiluted; a soft wash done right protects the beds before the first drop goes on.
Timing It Right
Roof treatment runs from April through October, and warm, dry days are best because the solution works faster and dries before evening. Spring visits clear the association notices that go out after inspection; late summer is the quiet season with the most open dates. Winter is out, since the solution needs temperatures above freezing to work and ice on a roof is not a place for a crew.
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Roof Cleaning in Macomb Township: FAQs
How much does roof cleaning cost in Macomb Township?
From $450 for a typical two-story colonial, priced by roof area and pitch and by how heavy the growth is. Ranches with simple roofs sit near the start; steep colonials with multiple gables run more. Doing the roof, house and gutters in one visit is the cheapest way to book all three, and the estimate shows each price.
Will the treatment hurt my shingles or the warranty?
No. Soft washing at low pressure with a hypochlorite solution is the cleaning method the shingle manufacturers describe, and a roof cleaned that way keeps its granules. What voids coverage is pressure washing, which strips them. We leave a dated record of the method, and the streaks fading over the following weeks is the sign the growth is dead rather than bleached.
Why are the streaks only on one side of the roof?
Because the algae grows where the roof stays damp longest, which in an open township subdivision is the north slope and any slope shaded by the house next door. South and west faces dry within an hour of sunrise and stay clear for years. The colony spreads from the first spot downhill, so the streaks run vertically from the ridge toward the gutter.
Can you clear a roof citation from our association?
Yes, and it is a common reason for township calls in April and May. The treatment is one visit, the before-and-after photos are taken from the street where the inspector stood, and you forward them with a short completion note. Because the dead algae weathers off over weeks, we note the date of treatment on the record so the association knows the fade is in progress.
More in Macomb Township
Deeper reading: What Are Those Black Streaks on My Roof? (And Why You Shouldn't Ignore Them) and Got an HOA Exterior Notice? Here's How to Clear It Fast.
Book Roof Cleaning in Macomb Township
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