Exterior Cleaning Services in North Madison

Cherokee Marsh to the north and Lake Mendota to the south create a humidity corridor that runs right through Sherman, Northport, and Mendota Hills. The two water bodies together keep humidity higher in this band of the city than in flatter, drier neighborhoods. The result: north- and east-facing siding stays damp until mid-afternoon on most warm days, which is exactly the moisture window algae needs to establish. We typically see visible green streaking on untreated Sherman ranch homes by mid-June each year, sometimes earlier in wet springs.

Low pressure and chemistry-first. Sherman and Northport ranches from the 1950s and 1960s have original aluminum siding that dents under pressure above 800 PSI, and the factory paint coatings can fail under any direct concentrated spray. We work at 400 PSI or below with a wide 40-degree fan tip, applying sodium hypochlorite surfactant in the 0.5% to 1.5% concentration range to kill algae chemically. Pressure rinse only flushes runoff. Done right, original aluminum returns to factory color without any denting or paint lift — we've cleaned dozens of Troy Drive and Northport Drive homes this way.

Yes — Cherokee Marsh cottonwood seed is one of the worst gutter-blockage materials in our service area. The light fluffy seed lands in gutter channels in enormous quantities every late May and early June, then mats together with the first heavy rain into a near-solid plug that no amount of garden-hose flushing can move. Combined with the Marsh's pollen load, downspouts on every untreated Sherman and Northport Drive home block completely by mid-June without preventive cleaning. We recommend a late-June cleaning specifically targeted at cottonwood and pollen, plus the standard November leaf clean.

Yes — Blackhawk and Mendota Hills are some of our highest-attention service areas because the larger lots and mature oak canopy create both challenge and reward. Tannin staining on concrete driveways and patios under oak canopy is heavy and requires oxalic-acid pre-treatment to remove. Moss on shaded walkways and on the north side of homes needs a sodium-percarbonate or low-concentration SH treatment. The work takes longer but the before/after on a fully-cleaned Blackhawk property is dramatic.

Yes, and we use a deionized water system for any lake-facing or irrigation-affected glass. Lake View Heights and Mendota Hills homes near the shore see fine mineral particulate from lake spray and from irrigation overspray that deposits on glass even after rinsing with tap water. The DI system rinses pure and the windows stay spot-free for weeks rather than days.

We start residential exterior cleaning as soon as overnight temperatures stay reliably above 35 degrees — usually the second week of April. Some North Madison customers like to be on our early-April list because algae is already visible by then and waiting until May means a busier route. Spring scheduling fills first, so booking by late March is the best way to lock in a preferred date.