Caldwell pressure washing is $0.20 per square foot and soft-wash house washing is $0.18 per square foot. The job that most Caldwell properties actually need is not driveway grime but the organic growth that a long Canyon County fog season leaves on every north-facing surface.
Weeks of fog without drying is exactly what algae needs, and it establishes on north walls, shaded flatwork and fence lines. That is a soft-wash job at $0.18 per square foot on siding, and it is chemistry rather than pressure that removes it.
Driveways, patios and walkways at $0.20 per square foot can take real pressure. Siding cannot. Anyone proposing to blast algae off stucco or hardie with a high-pressure wand is likely to drive water into the wall.
As with windows, Caldwell flatwork carries field grit that vehicle traffic presses into the surface. It cleans well but it is more embedded than suburban dirt, so expect it to need genuine pressure rather than a rinse.
Clearing organic growth before winter means it does not spend the wet months established and feeding. Doing it in fall is markedly easier than dealing with a mature green wall in March.
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$0.20 per square foot for flatwork, and $0.18 per square foot for soft-wash house washing.
Long fog seasons keep it damp for weeks without drying, which is the condition algae needs.
It should not be. High pressure drives water into the wall. Soft-washing removes it chemically instead.
Fall. Clearing growth before winter stops it being fed through the damp months.
Agricultural grit gets pressed into the concrete by traffic, so it is more embedded than ordinary street dirt.
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