Most of the siding on Warm Springs Avenue is painted wood that has been on the house since the 1890s or 1900s, with brick and a little stucco mixed in. It stains three different ways here: green on the north wall under the maples, chalk on the south, and a hard mineral band wherever a head throws at the house.
Drive the avenue and you are mostly looking at painted wood: narrow lap siding, shiplap, cedar shingle in the gables, wood brackets and dentil trim under deep eaves. Mixed into that are solid brick elevations from the same era and a run of 1920s stucco. Almost none of it is vinyl or fiber cement, and that changes the whole job. Vinyl shrugs off a bad operator. Hundred-year-old paint over old-growth wood does not, and neither does soft lime mortar between century brick. So everything we do on this street is soft wash: a cleaning solution that does the work chemically, applied and rinsed at pressures closer to a garden hose than a pressure washer. The chemistry kills and lifts the growth. Pressure is only there to carry water.
The mature canopy over Warm Springs, the silver maples, lindens and old elms, means the north and east elevations on most of these houses never fully dry out through spring. That is why the north wall goes gray-green and blotchy while the south wall of the same house looks fine. That growth is algae and mildew sitting on top of the paint film, and soft washing takes it off completely. The south and west walls have the opposite problem. Twenty-plus years of Treasure Valley sun oxidizes the paint film into a loose chalky powder that comes off on your hand. Washing removes the dirt sitting in that chalk and evens the wall out, but it does not restore the paint. If the chalk is heavy, what you are actually seeing is a paint job at the end of its life.
Plenty of yards along this stretch still run off the Boise City Canal, and that water is untreated: silty, algae-carrying and mineral-heavy. Boise tap is not much better at roughly 10 to 13 grains of hardness. Either way, a head that throws at the house instead of past it lays a band a couple feet up the wall: tan silt haze, hard white spotting, and on brick a chalky crust. The organic film and the silt wash off. Bonded mineral scale is a separate fight and sometimes it does not fully come out of porous brick or weathered paint at all. We will tell you which one you have before we quote it, and we will point out the specific head causing it, because if that head stays aimed at the house the band is back by August.
First pass is a walk-around. Loose or curling paint, open siding joints, failed caulk at the trim, missing glazing, crumbling mortar. Anything already coming off the house will come off faster with water on it, and we would rather flag it than find it. Beds get pre-wet and rinsed after; the foundation planting on these lots is old and worth protecting. Solution goes on low and dwells, then rinses from the top down at low pressure. No wand held against painted wood, no lance work on brick joints, nothing driven up under lap siding where it will sit in the wall cavity. On homes this old the paint is very likely lead-based, which is another reason nothing here gets blasted. We are cleaning the surface, not stripping it.
House washing is $0.18 per square foot, soft wash, safe for painted wood, brick and stucco. We quote the whole elevation before anyone unrolls a hose. Most Warm Springs houses do not need all four sides every year. The shaded north and east walls are usually on a yearly cycle and the sun sides go two or three years, so ask us to price it that way if it fits your house. Pressure washing for walks and drives is $0.20 per square foot, gutter cleaning starts at $199, and window cleaning starts at $199. Memberships are monthly or quarterly with no contract, quarterly saves $100 per cleaning, and every visit carries our 7-Day Rain Guarantee. Same-day and next-day slots are often open. Call or text (208) 453-6760.
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Not the way we do it. Soft washing uses cleaning solution and low-pressure rinsing, not a pressure washer aimed at the wall, so sound paint stays put. What can come off is paint that was already failing, curling, blistered or lifting at the lap edges. We walk the house first and show you those spots before we start. If a wall is more loose paint than sound paint, we will tell you it needs a painter before it needs a wash.
The wash takes it off completely, and it comes back slower than most people expect because the solution kills the growth rather than just knocking it loose. But the reason it grew there has not changed: heavy tree cover and a wall that stays damp. On a shaded north or east elevation under those maples, plan on roughly once a year. Cutting back branches touching the wall buys you more time than a stronger wash would.
Partly, and this is the honest part. That chalk is the paint film itself oxidizing after years of south and west sun. Washing removes the dirt and growth sitting in it and evens the color out, so the wall looks dramatically better. It does not put the binder back in the paint, and it will chalk again. Heavy chalking is a signal that the paint is near the end. If you are repainting soon, wash first, then paint.
Yes, with soft wash only. The lime mortar in a solid brick house from this era is much softer than modern mortar, and a pressure wand will cut it out of the joint and leave a stripe you cannot undo. So no lance work on brick here. We use low-pressure application and rinsing on the whole elevation. If we see joints already eroded, spalling face brick or a previous bad wash, we photograph it and tell you before we clean it.
Two layers are usually in that band. The silt and organic film wash off cleanly. Hard mineral scale, from ditch water or hard tap, is bonded and may only lighten, especially on porous brick or chalky paint. We tell you which one you have when we quote instead of after. We will also point out the head that is throwing at the house, because until that is turned or swapped, the band returns within a season.
Less often than a whole-house schedule suggests. Under this canopy the shaded north and east walls generally want yearly attention, while the south and west walls hold up two to three years unless something is throwing water or dust at them. Wash by elevation and you spend less. We are Meridian-based, about twenty-five minutes west, work Boise Monday through Saturday, and are locally owned, fully insured, and rated 4.9 stars across 115+ Google reviews.
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