Roof Cleaning in Fraser

Most roofs in the city cover houses built between 1950 and 1970, so the shingles up there are the second or third set on an unchanged frame. The streaking is algae, and it feeds on the limestone filler in the shingle, so it takes hold wherever the surface stays damp and runs down-slope with the water. On the older blocks near Steffens Park and off Garfield Rd, where street trees hold shade on a roof until late morning, the north and east slopes darken first and worst. South toward 13 Mile Rd the sky is open, a roof dries by mid-morning, and the same shingles go years longer.

Where a limb hangs over the slope, the problem goes past staining. Shade and steady leaf litter let moss seat itself at the shingle butts and in the valleys, where it holds water against the roof like a sponge. On a brick-and-block house that counts twice, because the water moss keeps on the slope eventually runs down a wall that already takes days to dry. The oldest houses in Fraser stand along Utica Rd and near the old depot, and their roofs have had the longest time to collect it. Once moss lifts the bottom edge of a shingle, wind finds the gap, and that is a leak waiting for the right storm.

The treatment is chemistry applied from the edge and then left alone. A roof-strength solution wets the slope, kills the algae and the moss down to the holdfast, and rain carries the dead growth off over the following weeks, so the roof keeps lightening after the crew has gone. Nothing is scrubbed, nobody walks a brittle slope, and no pressure reaches a shingle. Roof treatment in Fraser starts at $450 and holds three to five years, with the shaded blocks at the shorter end. Gutters are flushed afterward, and the beds below are soaked before the job and rinsed after, because the runoff has to land somewhere.

Why Shingles Fail Under a Pressure Wand

Pressure ruins an asphalt roof. A wand strips the granules that give a shingle its color and its shield against sun, and the bare mat underneath then ages in a few seasons instead of a few decades. It also drives water under the courses into the decking. Scraping moss by hand lifts the shingle edges the moss has already loosened, and even a stiff brush takes granules with it. The quieter mistake is treating only the front slope a visitor sees, while the growth that reseeds the roof every year keeps living on the shaded side out back.

Timing It Right

Any month above freezing works, and the solution does not need sun to do its job. Spring brings most of the calls, when winter has darkened the streaks and everything outside is getting attention anyway. Fall is the better pick when gutters are also on the list, since one visit handles the slope and the run before the leaves finish falling. Plan on the treatment every three to five years, sooner on north slopes under the heavier canopy.