Roof Washing in Old Zionsville, PA 18068

Old Zionsville Roof Washing Services

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Old Zionsville sits in the wooded southern stretch of Lehigh County, where Upper Milford Township spreads out into rolling mature canopy and the kind of shaded lots where algae, moss, and lichen take hold quickly. A single low-pressure wash handles all three at once.

No pressure on the shingles, no scraping. The detergent does the work and the rain finishes it.

Pressure Brothers washing a house Before and After of a house cleaned by Pressure Brothers Before and After of a pool deck cleaned by Pressure Brothers Before and After of a walkway cleaned by Pressure Brothers An awning before and after being cleaned by Pressure Brothers Half of a retaining wall pressure washed to show before and after before and after split view of a pressure washed front walkway Before and After of a pool deck cleaned by Pressure Brothers Dirty concrete with the word 'dirty' pressure washed out of it Dirty concrete with a smiley face pressure washed out of it

Our Process

Plant and Property Protection

Before anything touches the roof, we protect all plants and landscaping around the home. We bag every downspout to collect leftover detergent and prevent it from reaching the grass or garden beds.

Low-Pressure Detergent Application

We apply a specialized detergent to the entire roof surface using a low-pressure method. The detergent is designed to kill all growth on the shingles, including algae, moss, and lichen. No high pressure is ever used on the roof.

Immediate and Ongoing Results

The algae and black streaking disappear immediately during the wash. Heavier growth like moss and lichen turns bright white after the detergent is applied. Over the following weeks, the dead growth breaks down naturally and washes away with the next good rainstorm. We use this approach specifically to avoid pulling growth off prematurely, which could damage the shingles underneath.

What Our Customers Say

"Very satisfied with the work and results. Thank you"

Jason P.

"⭐️⭐️⭐️⭐️⭐️ If I could give more stars I would! 🤩 Pressure Brothers did an absolutely amazing job on our house wash! From start to finish, the entire experience was professio..."

Emily W.

"Above and beyond 5-star service! From my initial contact to meeting Ryan for a more than fair estimate, to Robbie's (at the time promised) and crew PLUS Joe's finishing touches, Pr..."

Tony P.

Frequently Asked Questions

Upper Milford has some of the heavier mature canopy in southern Lehigh, especially on the back-road properties where the homes are set further from open sky. Shingles under that kind of canopy stay damp long after a rain, and damp shingles grow algae. By the time you can see it from the curb, moss is usually right behind.
Yes. Insurance carriers across Lehigh County are paying closer attention to algae, moss, and lichen on roofs during inspections and renewals. A professional roof washing is the most affordable response.
Yes. Even a light pressure pass is enough to dislodge granules on shingles that have already weathered for a decade or more, and a heavier pass cracks them outright. There is no version of pressure washing that is safe for an asphalt roof.
The visible algae streaking is gone the day of the wash. The heavier moss and lichen common on Upper Milford roofs turn white right after the detergent application, then break down over the following few weeks of rain. We never scrape thick growth off the shingles, since scraping is what strips granules and shortens the life of the roof.
We serve Old Zionsville and all of Upper Milford Township along with Limeport, Coopersburg, Center Valley, Emmaus, Macungie, and the broader southern Lehigh County area.

Why Old Zionsville Homeowners Choose Pressure Brothers

Old Zionsville and Upper Milford Township have larger, often more wooded lots than the boroughs closer to Allentown. That setting is beautiful but it is exactly the kind of shaded, moist environment that drives moss and lichen growth on roofs, especially on north-facing slopes.

Older homes scattered across the township get a longer detergent dwell so the growth breaks down without disturbing already-weathered shingles. Newer homes get the standard low-pressure detergent process that protects the manufacturer warranty. Every job includes plant protection, downspout bagging, and a final walkthrough.

Ready for a Cleaner Home in Old Zionsville?

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Last updated May 2026

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