Soft Washing in Roseville
The trees Roseville planted beside its ranches in the 1950s are now 60 to 70 years old, and the shade they throw is why the north wall of a house goes green while the south wall stays clean. Soft washing kills that growth at the root, so it stays gone for years instead of weeks.
Green siding in Roseville is a moisture problem before it is a dirt problem. Algae, mildew and lichen only grow while a surface is damp, and a north or east wall under a full canopy stays damp long after the sun has dried the rest of the house. The biggest trees stand over the oldest blocks near Gratiot Ave and 11 Mile, so that is where the growth is heaviest, and the eastern streets nearest St. Clair Shores get an extra share of humidity whenever the wind comes off Lake St. Clair. The wall does not have to be dirty to grow it. It only has to be wet.
Soft washing is a solution applied at garden-hose pressure that kills the growth where it roots, left to dwell, and rinsed off gently. It works on every surface these houses have: the aluminum or vinyl over wood on a 1940s bungalow, the brick and oxidized aluminum trim on a ranch, and the vinyl walls of the condominium buildings along Gratiot and the Mile roads. A pressure washer cannot do the same job. It shears the visible layer off the top, leaves the roots in the siding texture, and on aluminum over wood it forces water up behind the laps, so the wall looks clean for a month and is green again by fall.
Killed growth stays gone two to three years on a shaded wall and longer on a sunny one, which is the difference between a wash that is maintenance and one that is a subscription. Soft washing starts at $349 for a house, and it is the same method behind our house washing in Roseville, with the mix adjusted wall by wall. Plants are pre-wet and covered, including the neighbor's along the lot line. The quote is itemized and back within 24 hours, and our Clinton Township shop is about 15 minutes away.
Low Pressure, Long Dwell
We test the mix on an inconspicuous spot of each material first, because oxidized aluminum trim and painted wood take a gentler solution than vinyl. Beds and shrubs on both sides of the lot line are soaked with clean water and covered where the drift could reach. The solution goes on from the bottom of the wall up, which prevents the clean streaks that run down a dry wall, and it dwells for ten to fifteen minutes while the growth dies. The rinse runs from the top down at garden-hose pressure, glass is rinsed before anything can dry on it, and the plants get a final rinse before we leave.
Why a Rinse Is Green Again by Fall
A rinse-only wash takes the color off the wall and leaves the roots, so the green comes back within a season on any shaded wall in the city. Mixing the solution too strong to make up for a short dwell bleaches painted aluminum trim to a pale patch and browns the hostas under the wall. Working on a windy afternoon without covers puts the mist on the neighbor's siding and car, which on a Roseville lot is only a few steps away. Letting the solution dry on window glass leaves a haze that has to be cleaned by hand.
Timing It Right
The north wall shows its green by late spring and grows it through October, so any month from April onward works, with the first dry week of the season the most popular. A wall that goes green every two years under the biggest trees near 11 Mile can be booked as a single-wall refresh in the off year. We do not wash when the temperature is near freezing, since the solution needs the surface above that to work.
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Soft Washing in Roseville: FAQs
Is soft washing different from house washing?
Soft washing is the method, and house washing is the job that uses it. Both run at garden-hose pressure with a solution that kills growth rather than shaving it. When a Roseville owner asks for soft washing specifically, it is usually because a single shaded wall or a roof has gone green, and that can be quoted on its own rather than as a full house.
Will the solution hurt my garden or my neighbor's?
Not when it is handled the way we handle it. Beds on both sides of the lot line are soaked with clean water first, covered where drift could reach, and rinsed again at the end, because a well-watered plant sheds the solution instead of drinking it. The mix on the wall is diluted well below what would harm a shrub, and it neutralizes quickly in soil.
Why does my north wall turn green when the house across the street stays clean?
Orientation and shade. Your north wall faces away from the sun and probably sits under a street tree that has had sixty years to grow, so it stays wet hours longer every morning than a wall that faces south. Growth needs those wet hours. The house across the street has its shaded wall on the back, where you cannot see it from the road.
Do you soft wash the condo buildings along Gratiot?
Yes, on contract with the association, since a continuous vinyl wall cannot be washed one unit at a time. Buildings are done on a rotation, residents get notice ahead of each visit, and the board receives photos and an insurance certificate naming the association. An owner who wants the work to happen can bring the board a written quote, which we prepare at no charge.
More in Roseville
Deeper reading: Why One Side of Your House Is Always the Green Side and Soft Washing vs. Power Washing: Which Does Your Home Need?.
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