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Pittsburgh's humid climate and tree cover create ideal conditions for algae, mold, and mildew on exterior siding.
Algae, mold, and mildew on your siding aren't just cosmetic — they hold moisture against the surface, accelerate fading, and shorten the lifespan of any siding material. We use soft wash cleaning with biodegradable solutions that kill organic growth at the root rather than just blasting the surface — results last significantly longer and there's no risk of driving water behind panels. A cleaning visit often catches early signs of siding damage, loose panels, or failing caulk before they turn into water intrusion problems.
Soft wash first
Material-appropriate cleaning
Siding restoration service
Algae and mold on siding are not just cosmetic problems. Algae holds moisture against the siding surface, which accelerates deterioration of paint, coatings, and in some cases the material itself. Regular cleaning extends the life of your siding and keeps the paint or factory finish looking right between recoats. For Pittsburgh homeowners, cleaning every two to three years is a reasonable maintenance schedule given the region’s humidity and tree cover.
Siding restoration is a service we provide for siding that has accumulated years of oxidation, biological growth, and grime but is otherwise structurally sound. Soft wash cleaning combined with appropriate restoration treatment can significantly improve the appearance of older vinyl, aluminum, and painted wood siding without requiring a full replacement. If the siding has physical damage or is beyond what cleaning can address, we’ll tell you that and give you a repair or replacement estimate instead.
We also offer pre-painting siding cleaning. If you’re having your home’s exterior painted, a clean, properly prepped surface is the foundation of a paint job that lasts. We can coordinate the cleaning with your painting timeline to ensure the surface is ready when the painters arrive.
Pittsburgh’s climate is tough on exterior siding. Professional cleaning extends the life of your siding and improves your home’s curb appeal. Free written estimate.
Soft wash first. We use the right technique for the material — no high-pressure blasting on fiber cement, wood, or vinyl siding.
Material-appropriate cleaning. Different siding types need different chemical approaches. We match the solution to the surface.
Siding restoration service. For older siding that needs more than a rinse, we offer restoration cleaning that revives oxidized and stained surfaces.
Written quotes. You know what it costs before we start.
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We follow a four-stage soft wash process that removes organic growth without damaging panels:
Step 1 — Assessment & Quote
We look at the siding type, the type and extent of contamination, and any areas of concern. Written estimate provided before we start.
Step 2 — Surface Preparation
We pre-wet plantings and landscape elements near the house to protect them from cleaning solution runoff. Windows and doors noted for rinse-down afterward.
Step 3 — Soft Wash Application
Cleaning solution applied to siding and allowed to dwell for appropriate contact time. The solution breaks down algae, mold, mildew, and organic growth at the surface.
Step 4 — Low-Pressure Rinse
Surface rinsed with controlled-pressure water to clear residue. Pressure settings are calibrated for the siding type to avoid moisture infiltration or surface damage.
Step 5 — Final Walkthrough
We walk the exterior with you, confirm all contamination has been addressed, and identify any areas where siding damage was uncovered that may need repair.
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Leak prevention & weather resistance.
High-pressure water can damage siding. On vinyl, it can force water behind laps. On fiber cement, it can strip factory coatings. On wood, it raises grain and erodes the surface. Soft wash uses lower pressure combined with appropriate cleaning solutions that break down organic growth without stressing the material. For most residential siding, it's a better method.
In Pittsburgh's climate — humid, significant tree cover, frequent overcast conditions — every two to three years is a reasonable maintenance schedule for most homes. Heavily shaded north-facing walls may benefit from annual cleaning. You'll see algae and mold growth starting and can judge timing from there.
We pre-wet plantings around the house before applying cleaning solution and rinse them down during the cleaning process. Properly applied and rinsed, the cleaning solutions we use are not harmful to established plantings. We take care around sensitive or newly planted areas.
Cleaning removes surface dirt and biological growth but won't reverse oxidation or chalking on older aluminum. For significantly oxidized aluminum, a restoration treatment or painting is the next step. We can tell you which option makes sense for your siding's condition during the assessment.
Yes. We clean all three, and we adjust our technique and cleaning solutions based on the material. Fiber cement requires particular care to avoid stripping ColorPlus or painted finishes. Wood requires lower pressure and appropriate wood-safe cleaners. We treat each material correctly.
Most Pittsburgh homes benefit from cleaning every 2–3 years. Homes under tree canopy or with north-facing walls accumulate algae and mildew faster. Regular cleaning also prevents biological growth from etching the surface and causing premature fading.
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Call 412-743-8208 or fill out our form for a free, no-obligation estimate. We serve Pittsburgh and all surrounding areas including Allegheny, Beaver, Butler, Washington, and Westmoreland counties.
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