Seneca Springs is twelve Schell Brothers homes on quarter- to half-acre lots off Beacon Light Road, all of them built inside the last few years. Siding that new doesn't read dirty from the street yet. But the sprinkler line, the shaded north walls, and the sun side are already three separate problems with three different fixes.
Schell built four plans in Seneca Springs — Monterey, Whimbrel, Stonefield, Shearwater — and they don't all wear the same exterior. What we see on custom builds of this era around Star is lap siding as the field material, stone veneer wainscot at the base and around columns, and stucco or board-and-batten filling gable ends. The lap is either fiber cement or engineered wood, and you can't always tell from the ground. We check on arrival: fiber cement is dense and rings hard when tapped, engineered wood sounds duller and swells at cut ends and butt joints if water has gotten in. It matters because engineered wood is unforgiving about water driven up under the laps. That's the whole reason everything we do on siding is soft wash — the cleaning is chemistry, the pressure is only a rinse.
Your HOA runs the irrigation on these lots, and the water in those lines is untreated canal water off the Boise River system — suspended silt on top of dissolved mineral, roughly mid-April through mid-October. On a quarter- to half-acre lot you need more heads pointed in more directions than a standard in-town Star lot, and on newer builds a lot of them sit close enough to throw straight onto the wall. What you get is a band about knee-to-chest height: tan silt film first, then a chalky white or rust-orange mineral crust once it's baked on through a couple of summers. Two different stains stacked on each other. The silt washes off with a normal soft-wash mix. The mineral does not, and anyone who tells you it will is guessing.
The north and northeast elevations here go dark before anything else does, and it isn't dirt — it's algae, and it's alive. Newer builds like these run generous eave overhangs, which keep the top of a shaded wall from ever getting direct sun to dry it out. Add irrigation overspray and a north wall stays damp for hours after a zone runs. You get a green-to-black film that starts near the base and creeps up, worst behind foundation shrubs and on the shaded side of chimney chases. Pressure knocks the surface layer off and it looks fixed for about three weeks, because the root structure is still in the pores. It needs a hypochlorite mix given time to dwell and then a low-pressure rinse. Same wall, done right, stays clean roughly a year.
Here's the honest one. Go rub your palm hard on the south or west wall. If a fine powder comes off on your hand, that's chalking — the resin binder in the coating breaking down under UV, releasing loose pigment. A wash takes the chalk film off and the color comes back some, but it will not restore pigment that's already gone, and a west wall that's faded will still be a shade lighter than the north wall when we leave. That's a repaint conversation, not a washing conversation. Worth knowing on a neighborhood this new: factory-finished fiber cement should not be chalking heavily on a house only a few years old. If yours is, take photos before we wash it and check your builder and coating warranty first.
Soft wash at $0.18 per square foot, safe on lap siding, stucco, stone veneer and brick. We pre-wet and rinse landscaping before and after, ask you to close windows and shut any open vents, apply the mix at low pressure, let it dwell, and rinse from the top down so nothing dries mid-wall and streaks. Stone veneer gets kept off the mortar joints entirely. Gutter faces are a separate job — those black stripes are oxidized aluminum, not dirt, and they need a dedicated brightener. Memberships run Monthly or Quarterly with no contract, and there's a 7-Day Rain Guarantee. Same-day and next-day slots are usually open. Fully insured, locally owned, 4.9 stars across 115+ Google reviews. Call (208) 453-6760.
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Partly. The band is two things stacked: canal silt from the HOA irrigation, and hard-water mineral baked underneath it. Soft washing removes the silt and any algae in it, and most homes look dramatically better. The mineral crust is a separate problem that needs an acidic treatment, and on textured surfaces it may not lift completely. We'll tell you at the estimate which one you've got rather than promising both.
Not on the field of the wall. High pressure drives water up under lap siding, blows out stucco texture and erodes mortar joints on stone veneer. We soft wash instead — a cleaning solution does the work, and the pressure is only enough to rinse. That's why our siding price is $0.18 per square foot rather than a pressure rate. Pressure has its place on flatwork and driveways, not on the house.
Most homes here don't need a full wash every year. The north and northeast walls are usually the only elevations growing anything, and those benefit from an annual pass. The whole house every eighteen to twenty-four months is plenty for most of this neighborhood. If your only complaint is the sprinkler band, a partial low-wall wash costs less than doing the whole envelope and fixes what you're looking at.
We pre-wet all plant material, tarp anything sensitive, and rinse the beds again when we finish, which dilutes what runs off. Established shrubs and lawn handle it fine. Irrigation heads and lines are underground and unaffected. If you have new plantings that went in this season, point them out and we'll route runoff away from them and rinse those beds twice.
It's $0.18 per square foot of wall surface, which is not the same as your heated square footage. These plans run from under 1,900 to over 3,000 heated square feet, and two-story elevations carry a lot more wall than the floor plan suggests. We measure rather than estimate off a listing. Stone veneer and stucco accent areas are included in the same rate, not charged extra.
Yes, and that's the right order — house first, windows after. Washing siding puts solution and rinse water across the glass no matter how carefully you work, so cleaning windows first wastes the work. The window pass is 100% pure deionized water with no soap, done after the siding is rinsed and settled. Booking both together saves a second trip charge.
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