10/29/2026
Painting over contaminated exterior surfaces is one of the most expensive mistakes Ottawa homeowners make.
Paint applied over biological growth, mineral deposits, or salt-affected brick fails faster than paint applied to a clean substrate. The paint film bonds to the contamination layer, not to the brick. When the contamination shifts as biological growth continues its lifecycle and mineral deposits migrate the paint lifts with it.
A repaint on contaminated brick typically fails in 3–5 years. The same paint on a properly cleaned substrate: 8–12 years.
This Centretown East homeowner had received a painting quote for their painted brick exterior. Their painter recommended a professional soft wash first standard practice among Ottawa painters who understand substrate preparation.
We soft washed the brick. The biological growth, chalk, and pollution film came off. The existing paint, where it was properly bonded, was in excellent condition. Only one small section needed repainting a fraction of the full quote.
The painter came back, prepared the clean substrate correctly, and applied new paint only where needed.
Total project cost: significantly less than a full repaint over dirty brick that would have failed in four years.
→ clearottawa.com · 613-686-1739