House Washing in Roberts and Hill, Boise, Idaho

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What Grows and Settles on Roberts and Hill Siding

Exteriors here collect three separate things. On north and east elevations, where sun never fully dries the wall, you get algae and mildew as a green-black film. Along the bottom three feet you get mud splash and irrigation overspray staining — the same mineral that marks the glass marks the siding, and on light vinyl it reads as a permanent dingy band. Everywhere else you get decomposed granite off the foothills, plus the winter inversion that traps particulate at ground level for weeks at a time. Each needs different treatment, which is why one pass with a pressure wand does a poor job on all three. We see it most consistently on the homes along N Duncan Ln.

Soft Wash, Not Pressure

House washing is a chemical process, not a force one. We apply a surfactant and sodium-hypochlorite blend at low pressure, give it dwell time to kill the growth at the root, and rinse. High pressure drives water up behind lap joints and into the wall assembly, strips the chalking layer off aging vinyl, and on stucco and manufactured stone it will take the finish off outright. Soft washing kills the algae rather than knocking the top off it, which is why it stays gone longer. We pre-wet and rinse every bed on the wash path. Being this close to Floating Feather means the road-facing elevation is always the one that needs the most attention.

What Boise Adds to This Job

Boise glass carries something the rest of the valley does not: foothills grit. Decomposed granite off the slope is sharp and fine, it travels on the afternoon downslope wind, and in winter the valley inversion holds everything else down at ground level with it. On a Roberts and Hill property that shows up as a shorter useful interval than the same work would hold somewhere else in the valley, which is worth knowing before you decide how often to book. If you are on N Misty Cove Ave or one of the streets off it, we are likely already working nearby.

Where We Stop

Soft washing removes organic growth and dirt. It will not fix oxidised vinyl, it will not pull efflorescence out of masonry, and it does not repaint anything. We are locally owned and fully insured, and we would rather point you to the right trade than take work we cannot finish well.

Combining Services

Bundling with window cleaning saves a trip charge and gets the sequence right. We will tell you honestly if you do not need the second service yet — a bundle you do not need is not a saving.