
St. Catharines Soft Washing
Gentle House Washing For The Garden City
Safely restore your St. Catharines home's exterior with professional soft washing and house washing!
Free Soft Washing Quote
Professional Soft Washing
Revitalizing Your St. Catharines Home With Gentle Pressure & Effective Solutions
Safely restore your St. Catharines home's exterior with professional soft washing and house washing!
Soft washing for St. Catharines homes involves applying a specialized biodegradable cleaning solution to exterior surfaces including siding, soffits, fascia, and eavestroughs, where the formula penetrates and destroys mold, algae, mildew, and organic buildup at the cellular level rather than just rinsing it from the surface. The solution is allowed to dwell long enough to fully break down the root structure of organic growth, then rinsed away with gentle, low-pressure water at roughly 60 PSI, well below the threshold that could damage vinyl, painted wood, or stucco finishes. In the Garden City's humid climate, homes in shaded Glenridge streets and along the mature canopy of Martindale develop dark streaks and green discolouration faster than most Niagara communities, making this root-level treatment essential for lasting results.
Soft washing preserves your home's exterior finishes while delivering a deep clean that lasts 12 to 24 months. With Porter Bros, St. Catharines homeowners get a service that protects both appearance and structural health.
Gentle Transformations Across
St. Catharines
St. Catharines Soft Washing
Proudly Serving Niagara & The Surrounding Regions
We are happy to service Niagara and many of the surrounding Cities & Regions.
Not sure if we service your area? Contact us!
Count On Us With Confidence
The Top Choice for Soft Washing in St. Catharines
- Absolute Satisfaction Assured
- Fully Licensed & Insured
- Expertly Trained, Friendly Professionals
- Cutting Edge Equipment & Tools
- Going Above & Beyond Industry Practices
- Countless 5-Star Google Reviews!

Read Our
St. Catharines Success Stories
St. Catharines homeowners are amazed at the difference soft washing makes on their siding, soffits, and eavestroughs. See how we have restored homes across the Garden City, from Martindale to Port Dalhousie. Love your results? Refer a friend and get a $20 credit on your next service!
Refer A FriendWe are extremely pleased with the windows. the crew were very efficient, on time, and respectful. Would highly recommend this company
Crystal clear results and even better service! I can't recommend Porter Bros Window Cleaning enough. From start to finish, the experience was seamless.
We've worked with Aidan on a number of projects with LandArt. He is hard working, takes responsibility for his work and provides top notch service. We are...
Read moreDiscover The Benefits Of
Soft Washing In St. Catharines
Soft washing uses lower pressure combined with specialized cleaning solutions, making it safe for a wide range of exterior surfaces. This method effectively cleans without risking damage to paint, siding, or delicate materials, ensuring your home's exterior remains intact and vibrant.
Choosing Porter Bros
Porter Bros Exterior Cleaning is the trusted choice for soft washing in St. Catharines because we combine gentle cleaning methods with powerful, long-lasting results. Our biodegradable solutions are safe for your siding, landscaping, pets, and family, which is critical for the garden-proud homes throughout the Garden City. We kill mold, algae, and mildew at their root structure so they do not return quickly, and our low-pressure approach at approximately 60 PSI protects paint, finishes, and manufacturer warranties. From century homes near downtown to modern builds in Western Hill, we tailor every soft wash to your home's specific materials and needs.
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Window Cleaning
Crystal-clear windows inside and out. We clean residential and commercial windows across the Niagara Region.
Gutter Cleaning
Thorough eavestrough cleaning to prevent water damage, foundation issues, and pest infestations.
Pressure Washing
High-pressure cleaning for driveways, walkways, patios, and concrete surfaces throughout the Niagara Region.
Holiday Lighting
Professional holiday light design, installation, maintenance, and removal for homes across the Niagara Region.
Frequently Asked Questions About
Soft Washing
Soft washing pricing for St. Catharines homes typically ranges from $300 to $600, depending on the overall size of your home, the number of exterior surfaces being cleaned, and the severity of organic growth present. A standard two-storey home with vinyl siding and moderate algae coverage falls in the middle of that range. Homes with heavy mold or algae buildup, especially those in shaded areas of Glenridge or near Twelve Mile Creek, may require additional treatment time and fall toward the higher end. We provide free, no-obligation quotes with transparent pricing before beginning any work. Most homeowners find soft washing is a fraction of the cost of repainting, which is often what people consider before learning about this service.
We provide soft washing throughout all of St. Catharines, including Port Dalhousie, Glenridge, Martindale, Merritton, Western Hill, Facer, Louth, downtown, and every surrounding neighbourhood across the Garden City. Our most frequent soft washing clients are in the older, tree-dense neighbourhoods where shade and persistent moisture create ideal conditions for organic growth on exterior surfaces. Homes along the mature tree-lined streets of Glenridge and the lakefront properties in Port Dalhousie tend to develop algae and mildew noticeably faster than homes in newer, more open subdivisions with greater sun exposure. Regardless of your specific neighbourhood or the severity of growth, our team provides prompt, reliable, and thorough soft washing service.
A full soft wash for a typical St. Catharines home takes approximately 2 to 4 hours from start to finish. Our process includes carefully applying the biodegradable cleaning solution to all affected exterior surfaces, allowing adequate dwell time for the solution to penetrate and kill mold, algae, and mildew at the root level rather than just on the surface, and then gently rinsing everything clean at low pressure. Larger homes, or properties with heavy organic growth on multiple sides of the house, may take 4 to 5 hours to complete properly. We work efficiently and minimize disruption to your day, and most homeowners are comfortable staying home during the entire process.
Yes, we provide roof soft washing for St. Catharines homes with asphalt shingles, cedar shakes, metal roofing, and other common roofing materials. Those dark black streaks visible on many roofs throughout the Garden City are caused by Gloeocapsa magma, a type of blue-green algae that feeds on the limestone filler in asphalt shingles and spreads across the surface over time. Soft washing is the only manufacturer-approved method for removing this algae from roofing. High-pressure washing would strip the protective granules from your shingles and void your roof warranty entirely. Our low-pressure approach safely eliminates the algae and restores your roof's original appearance without damaging the roofing material or shortening its lifespan.
Soft washing is most effective between late spring and early fall when outdoor temperatures are consistently above 10 degrees Celsius, which allows the biodegradable cleaning solutions to activate and work at their maximum effectiveness against organic growth. Late spring is a particularly good time for St. Catharines homes because it addresses the mold and algae growth that accelerated during the damp, cool winter months, and it restores your home's appearance before the outdoor entertaining season begins. We offer soft washing from April through November in the Garden City. Homes with heavy shade from mature trees or persistent moisture issues benefit most from annual treatment to keep organic growth continuously under control.
Absolutely. Many of St. Catharines' century homes near downtown and in the established neighbourhoods like Glenridge and Western Hill feature painted wood clapboard, aluminum, or other delicate siding materials that cannot tolerate the high-pressure output of a standard pressure washer. Soft washing was specifically designed for exactly these situations. Our low-pressure approach at approximately 60 PSI is actually gentler than a standard garden hose, so there is zero risk of water being forced behind siding panels, paint being stripped, or wood fibres being damaged during the cleaning process. We regularly clean heritage-era homes throughout the Garden City, and our technicians carefully assess each property's siding material before selecting the appropriate cleaning solution concentration and application technique.




