Roof Washing & Roof Cleaning in Princeton, NJ
Safe, effective roof cleaning that removes black streaks, algae, and moss while extending the life of your shingles.
Protect Your Roof With Professional Cleaning
Those dark streaks on your roof are not just cosmetic. They are caused by Gloeocapsa magma, a type of algae that feeds on the limestone in your shingles. Left untreated, algae, moss, and lichen can shorten your roof's lifespan by years and lead to costly repairs or premature replacement.
Our roof washing uses a safe, low-pressure soft wash method recommended by shingle manufacturers. We apply a specialized cleaning solution that kills algae and organic growth at the root, then gently rinse it away. No high pressure, no damage to your shingles or flashing.
A clean roof looks better, lasts longer, and can even improve your home's energy efficiency by reflecting more sunlight. We recommend roof cleaning every 2-3 years in the Delaware Valley climate.
Why Roof Cleaning Matters
Regular roof maintenance protects your biggest investment.
Extends Roof Life
Removing algae and moss prevents premature shingle deterioration and avoids early replacement.
Boosts Curb Appeal
A clean roof transforms your home's appearance and can increase property value.
Safe & Eco-Friendly
Low-pressure method with biodegradable solutions. Safe for shingles, plants, and pets.
Where We Provide Roof Washing
We serve communities across Mercer, Hunterdon, and Somerset counties in NJ and Bucks County, PA.
Other Services We Offer
Window Cleaning
Crystal-clear windows inside and out, including screens, tracks, and frames.
Soft Washing
Gentle, low-pressure cleaning for siding, roofs, and delicate surfaces.
Power Washing
High-pressure cleaning for driveways, walkways, patios, and hard surfaces.
Gutter Cleaning
Full gutter cleaning and flush to protect your foundation.
Roof Washing FAQ
What causes the black streaks on my roof?
Those dark streaks are caused by Gloeocapsa magma, a type of algae that feeds on the limestone filler in asphalt shingles. It thrives in humid climates and shaded areas. Left untreated, it spreads across the roof and can shorten shingle lifespan by years.
Will roof washing damage my shingles?
No. We use a low-pressure soft wash method that is recommended by major shingle manufacturers including GAF and CertainTeed. High-pressure washing can damage shingles, which is why we never use it on roofs. Our method relies on a specialized cleaning solution applied at safe, low pressure.
How often should I have my roof cleaned?
In the Delaware Valley climate, we recommend roof cleaning every 2 to 3 years. Homes with heavy tree cover, north-facing roofs, or roofs that stay shaded for much of the day may need cleaning more frequently. A clean roof lasts longer and keeps your home looking its best.
Can a dirty roof affect my energy bills?
Yes. Dark algae staining absorbs more heat from sunlight, which can raise attic temperatures and make your air conditioning work harder during summer months. A clean, lighter-colored roof reflects more sunlight and can help reduce cooling costs.
Get a Free Roof Washing Estimate
We are committed to delivering the highest level of professionalism, quality, and customer satisfaction. Contact us today for a free, no-obligation estimate.
Request a Quote (609) 255-3787