Green streaks, black stains, and dulled siding are more than cosmetic. We remove organic growth and buildup with a surface-specific approach that helps care for and preserve your home’s exterior.
Over time, homes across Central PA collect algae, mildew, dirt, pollen, and other environmental buildup. Shaded and damp areas often show it first, but the buildup can spread across siding, trim, eaves, and other exterior surfaces.
House washing is about using the right approach for the material. Rather than relying on force, we use surface-specific cleaning solutions and controlled pressure to break down organic growth and buildup while helping protect the surface underneath.
The result is an exterior that looks cleaner because it has been cared for properly, with a method designed around the condition of your home.
What we remove
The green film that spreads across shaded siding. It holds moisture against the surface and slowly breaks it down.
Organic growth that develops in damp areas and can spread across siding, trim, and other exterior surfaces if left unaddressed.
Runoff staining, oxidation, and environmental buildup that dull your home’s color and finish.
Eaves, soffits, and corners collect webs, nests, and debris that can make an otherwise well-kept exterior look neglected.
“Keystone made my siding and gutters look new.”— Bill & Wanda D.
Soft washing & surface-specific cleaning
Vinyl, aluminum, brick, fiber cement, painted wood: every surface responds differently, and the wrong method can cause damage. That’s why we start every house wash by identifying what we’re working with.
For most homes, that means soft washing: low pressure and specialized cleaning solutions that break down organic growth without relying on force. Where more durable materials call for a different approach, we adjust accordingly. The method fits the surface, not the other way around.
We also treat your property with care. Plants and landscaping are protected and rinsed, outdoor items are moved when needed, and we walk the finished job with you before we leave.
Add-ons & pairings
Fence cleaning
Fences collect the same algae, mildew, dirt, and environmental buildup as the rest of your exterior. We clean vinyl, wood, composite, and other fencing with methods matched to the material and condition.
The goal is to remove buildup appropriately without using more pressure than the surface needs.
Gutter brightening
Routine house washing can clean much of the exterior face of your gutters, but dark streaking and embedded staining may require additional treatment.
We match the approach to the gutter’s age, finish, condition, staining, and accessibility, then set realistic expectations for the result.
Too much pressure, the wrong chemistry, or improper technique can damage siding and other exterior surfaces. We match the method to your siding and its condition, which for most homes means soft washing and surface-specific cleaning solutions rather than relying on high pressure.
Protecting your landscaping is part of our process. We pre-rinse plants before we begin, take appropriate precautions while we work, and rinse again when the cleaning is complete. We also carefully move outdoor items when needed and return them when we’re finished.
Most homes can be completed in a single day, often within just a few hours depending on the size, condition, accessibility, and scope of the work.
For many Central PA homes, every one to three years is a reasonable starting point. Shaded properties or homes surrounded by trees may develop organic growth more quickly. We’ll recommend a schedule based on your actual home rather than a one-size-fits-all timeline.
Yes. We clean several common fence materials, but the method depends on what the fence is made of and its condition. We evaluate the surface first and adjust the cleaning approach accordingly.
Gutter brightening is a targeted treatment for staining, streaking, oxidation, and buildup on the visible exterior face of your gutters. It goes beyond routine house washing when discoloration has bonded to the surface. Results depend on the age, finish, condition, staining, and accessibility of the gutters, so we evaluate what we’re working with and set realistic expectations before treatment.
Serving York, Harrisburg, Mechanicsburg, Camp Hill, and communities throughout Central PA.
For larger commercial, industrial, restoration, and fleet projects, we're happy to travel beyond our primary service area. Not sure if we cover your location? Just ask.
Tell us what's growing, streaking, or stuck on your siding and we'll follow up with honest guidance and a clear quote.
