Using the wrong method can damage your home. Learn which technique is right for your siding, roof, driveway, deck, and Lancaster's distinctive brick and stucco surfaces.
Both clean your property — but they work differently, cost differently, and are appropriate for completely different surfaces.
Uses 100–500 PSI water pressure combined with biodegradable cleaning solutions. The chemical does the work — it kills algae, mold, and mildew at the root so it doesn't come back for 1–3 years.
Uses 1,500–4,000 PSI water pressure to blast dirt, grime, oil, and stains off hard surfaces. Effective for dense materials that can handle the force — concrete, pavers, and stone.
Our Lancaster crew will assess your surfaces and recommend the right approach before we touch a thing. No upsells, no surprises.
Call 717-807-7599 — Free EstimateLancaster County has a housing stock that's genuinely different from other Pennsylvania markets. The borough of Lancaster and surrounding towns like Lititz, Ephrata, and Manheim are full of 18th and 19th century brick row homes, fieldstone farmhouses, and stucco-over-block homes built throughout the mid-20th century. These are not vinyl-sided cookie-cutter houses — they require different care.
A significant percentage of Lancaster County homes — particularly those built between 1950 and 1990 — have stucco exteriors, either traditional 3-coat stucco or EIFS (Exterior Insulation and Finish Systems). Both of these surfaces look durable, but they're actually moisture-sensitive. High-pressure washing can:
The repair bill for water intrusion in a stucco home starts around $5,000 and can run much higher. Soft washing costs a fraction of that and leaves the surface intact.
Lancaster's historic brick homes — particularly in Lancaster City, Lititz, and Manheim — have mortar joints that range from decades to centuries old. High-pressure water erodes mortar, and once mortar starts going, repointing an entire facade is a significant expense. Soft washing cleans the brick face without affecting the mortar at all.
If you're maintaining a brick home in Lancaster County, soft washing is the only responsible choice. The visual result is the same — clean brick — but the surface stays intact and the mortar stays sound.
Lancaster sits in a humid subtropical climate zone. Summers are hot and wet, and the tree coverage across the county's rural corridors keeps moisture on siding and roofs longer. This creates ideal conditions for algae (the black streaking you see on north-facing roofs) and mold growth on siding. High pressure removes what's visible — but it doesn't kill the organism. Within a season, the streaking comes back.
Soft washing applies a biocide solution that kills the algae and mold at the root. Results typically last 2–4 years on roofs and 1–3 years on siding in Central PA conditions, versus one season for pressure-only approaches.
Yes — soft washing is the correct and only recommended method for vinyl siding. High-pressure washing can force water behind panels, cause warping, and void manufacturer warranties. Soft washing uses under 500 PSI with a biodegradable cleaning solution to safely remove algae, mold, and mildew without damaging the siding or the structure behind it.
No — high-pressure washing should never be used on stucco. Lancaster County has a significant number of older stucco and parged stone homes, and high pressure can crack the surface, drive water into the wall system, and cause serious moisture damage. The repair cost for water intrusion through cracked stucco typically starts at $5,000. Always use low-pressure soft washing on stucco.
Soft washing lasts significantly longer. Because it kills the organism causing the staining rather than just blasting the surface, results typically last 2–4 years on roofs and 1–3 years on siding in Lancaster's humid Central PA climate. Pressure washing removes what's visible but doesn't kill the root cause — algae and mold regrow faster, sometimes within a single season.
Soft washing only — never pressure wash a roof. High-pressure water strips the protective granules off asphalt shingles, shortening their lifespan and potentially voiding your warranty. Soft washing at low pressure with a biodegradable biocide solution kills the black algae (Gloeocapsa magma) that causes the dark streaking on Lancaster roofs, without damaging the shingles.
Lancaster Power Wash Pros serves Lancaster, Lititz, Ephrata, Manheim, Mount Joy, Elizabethtown, Millersville, Columbia, and surrounding communities across Lancaster County. Call us for a free estimate — we'll assess your surfaces and tell you exactly which method is right before we book the job.
717-807-7599 — Free estimates, no obligation.
We assess your surfaces, recommend the right method, and give you a clear price upfront — no surprises.
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