Ashton Estates sits off the Deer Flat end of Highway 69 on lots of 0.092 to 0.203 acres, and its walls carry something most Kuna siding does not: an oily road film from the highway that behaves nothing like dust and does not respond to water.
Tire wear, brake dust and exhaust particulate bind with road moisture into a genuinely oily film, and oil repels water. That is why hosing an Ashton Estates wall makes it look streaky rather than cleaner: the water beads and runs off the film instead of lifting it, redistributing what it does move. Cleaning this requires a solution that emulsifies the oily component so it can be rinsed away, which is exactly what a soft wash does and exactly what pressure alone does not.
This is the key point about road grime. Pressure removes things that are sitting loosely on a surface. An oily film is chemically adhered, so higher pressure mostly just drives it into the surface texture and behind the laps, taking water into the wall assembly along with it. The solution does the work here and the pressure only needs to be enough to rinse. House washing is $0.18 per square foot soft wash; pressure washing at $0.20 is for the driveway.
Idaho Transportation Department winter maintenance puts brine and de-icer on Highway 69 and traffic aerosolises it well past the shoulder onto walls as well as windows. It dries to a dull haze and it is mildly corrosive to painted trim, fasteners, light fixtures and window hardware. A wash in late winter or early spring removes it before it spends the whole season working on those components, which makes it maintenance rather than appearance on this corridor specifically.
Plans here run 1,024 to 2,470 square feet on lots as tight as 0.092 acres, so the wall area is among the smallest in Kuna and house washing prices on actual wall area at $0.18 per square foot. That matters on a corridor where the film returns continuously rather than seasonally: the twice-yearly rhythm this location warrants is genuinely affordable here in a way it would not be on a 3,800 square foot house.
The Ashton Estates HOA runs about $265 a year, among the lowest in Kuna, which means very little irrigated common area. So the mud splash and mineral band on your lower walls comes from heads on your own property rather than an association system. We identify the offending head free of charge, and adjusting it reduces the lower band permanently, leaving only the highway film to manage on a schedule.
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Because the film is oily rather than dusty. Tire wear, brake dust and exhaust particulate bind into a greasy layer that repels water, so the hose beads off it and redistributes what little it moves. It needs a solution that emulsifies the oil so it can be rinsed away.
No, and it would cause harm. Pressure removes things sitting loosely on a surface; an oily film is chemically adhered, so higher pressure mostly drives it into the surface texture and behind the laps, carrying water into the wall assembly. The solution does the work here.
Not the siding itself so much as the painted trim, fasteners, light fixtures and window hardware, which brine and de-icer are mildly corrosive to. A wash in late winter or early spring removes it before it spends a whole season working on those parts.
Among the least in Kuna. Plans run 1,024 to 2,470 square feet on lots as tight as 0.092 acres, so wall area is small and washing prices at $0.18 per square foot of actual wall area. That makes the twice-yearly rhythm this corridor warrants genuinely affordable.
Twice a year is sensible, because road film arrives continuously rather than seasonally and the winter de-icer load wants removing in late winter or early spring. The small wall area here keeps that practical rather than theoretical.
That part is usually your sprinklers: mud splash and canal mineral from heads on your own property, since the roughly $265 HOA fee means very little irrigated common area. We identify the head free of charge, and adjusting it reduces the lower band permanently.
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