Pressure washing is one of the fastest ways to make a home look newer without renovating anything. In Ottawa, it’s especially noticeable because our seasons leave a “layer” on everything—winter salt, spring grit, summer algae, and fall debris. The result is that driveways darken, siding looks dull, and patios start looking older than they really are.
But pressure washing isn’t just about blasting surfaces with water. The best results come from cleaning the right areas first, using the right approach for each surface, and avoiding the common mistakes that cause damage.
If you’re considering pressure washing Ottawa properties this season, this guide will help you prioritize what matters most and make sure the job is done safely.
Start With the High-Impact Areas
1) Driveways and Walkways
Concrete and interlock driveways collect salt residue, tire marks, and general grime. A proper clean can brighten the surface dramatically and improve curb appeal immediately. Walkways and front steps also matter because they’re the first thing guests see—and they can become slippery when algae or buildup forms.
2) Front Entrance and Porch Areas
This is the “photo” zone of your home. Dirt and dark staining around the entrance makes the whole house feel less maintained even if everything else is fine. Cleaning the entryway, porch, and rails can change the appearance more than you’d expect.
3) Patio and Backyard Entertaining Spaces
Ottawa summers are short. If you’re going to enjoy your outdoor space, cleaning patios, pool decks, and seating areas is worth it. Mold and algae buildup also make these areas slick, especially in shaded spots.
4) Siding (But With the Right Method)
This is where many people go wrong. Vinyl siding, painted surfaces, and delicate finishes can be damaged by too much pressure, or by directing water in ways that force it behind the surface. For many homes, the best approach is a gentler method designed to lift organic growth and dirt without aggressive pressure.
Pressure Washing vs Soft Washing (Simple Explanation)
Pressure washing is great for hard surfaces like concrete, certain types of brick, and durable stone. Soft washing is a safer approach for siding and surfaces that don’t react well to high pressure.
The goal is the same—remove grime, algae, and staining—but the method changes based on what you’re cleaning. If a contractor only talks about “high pressure,” that’s usually a sign they’re using the same approach everywhere, which isn’t ideal.
What to Avoid (Common DIY Mistakes)
Mistake #1: Using Too Much Pressure on Siding
High pressure can crack vinyl, strip paint, or push water behind siding and trim. The damage isn’t always visible right away, but it can lead to moisture problems later.
Mistake #2: Getting Too Close to the Surface
The closer you are, the more aggressive the force. People often carve lines into wood, etch concrete, or scar surfaces by holding the tip too close.
Mistake #3: Ignoring Window Frames, Seals, and Vents
Water can enter places you don’t want it to. It’s important to avoid forcing water into vents, older seals, or gaps in trim.
Mistake #4: Skipping Basic Prep
A little prep goes a long way:
- Move furniture and planters
- Cover or protect sensitive plants
- Ensure windows are fully closed and sealed
- Keep water away from outdoor outlets and fixtures
Ottawa-Specific Exterior Issues to Watch For
Salt Residue
Winter salt and sand buildup doesn’t just look bad—it can also wear down concrete and create a gritty texture. Spring is the best time to address it.
Algae and Mildew in Shaded Areas
North-facing walls, areas under trees, and spots with poor airflow often develop green growth. It spreads slowly, and by the time you notice it, it’s usually across a larger section of the home.
Interlock and Pavers
Interlock looks great when it’s clean, but cleaning it aggressively can remove joint sand. Depending on the condition of your pavers, it may need re-sanding afterward to keep everything stable and reduce weed growth.
How to Choose a Contractor (Quick Checklist)
If you’re hiring someone, look for:
- Clear description of what’s included
- Proper method for each surface (not one-size-fits-all)
- Before/after photos of similar work
- Professionalism and communication (shows up, explains the plan)
- Appropriate insurance coverage
A reliable company should be able to explain exactly how they’ll clean each surface and what results to expect.
Final Takeaway
Pressure washing is one of the best ways to refresh a property in a single day, but it’s worth doing correctly. Prioritize the high-impact areas, avoid damaging sensitive surfaces, and use the right method for the material you’re cleaning.
If you’re searching for trusted pressure washing Ottawa homeowners can count on, working with a professional team makes the process easier and safer—especially when your home has a mix of siding, stone, concrete, and outdoor living spaces. For homeowners who want a professional approach with proper surface care, Pressure Cleaning Canada is one option to consider for exterior cleaning.
