Concrete’s surface finish is more delicate than it looks, especially stamped or coloured concrete where too much pressure wears down texture or fades colour. We start at a lower pressure and adjust up only as needed, treating rust stains and efflorescence with a specific cleaning agent.
Even cleaning across broom-finished, stamped and exposed aggregate concrete.
Oil and tire staining lifted from high-traffic concrete.
Grime and algae removed from surfaces you walk on every day.
We check whether the concrete is plain, stamped or coloured, then confirm a written price.
We start at a lower pressure and adjust up only as needed, protecting stamped or coloured texture.
Rust stains and efflorescence get a specific cleaning agent rather than relying on water pressure alone.
A surface cleaner attachment gives even coverage on large flat areas like patios and garage floors.
We work carefully around landscaping and anything sitting on the surface.
We check whether the concrete is plain, stamped or coloured, then confirm a written price.
We treat rust stains and efflorescence directly with a targeted cleaning agent.
We wash the surface at a controlled pressure using a surface cleaner attachment for even coverage.
We check the finished surface with you before we leave.
Capital Wash & Seal provides professional concrete cleaning throughout Ottawa and the surrounding area. Poured and stamped concrete patios, walkways, garage floors and pool decks all pick up the same kinds of staining over time: rust marks from patio furniture, oil drips in a garage, algae in shaded corners, and the white, chalky efflorescence that forms as moisture moves through the slab and leaves mineral deposits on the surface. We clean concrete with pressure and cleaning agents matched to the finish, whether it's a plain broom-finished slab, a stamped decorative pattern, or an exposed aggregate surface, since each holds dirt differently and reacts differently to pressure.
Rust staining from patio furniture or metal fixtures usually responds well to a targeted cleaning agent, applied alongside pressure washing rather than relying on pressure alone.
Efflorescence is the white, chalky mineral deposit that forms as moisture moves through concrete and evaporates at the surface. It can be cleaned, though it may return if the underlying moisture source isn't addressed.
Yes, at the right pressure. We use lower pressure on stamped and coloured concrete to avoid wearing down the texture or fading the colour coat.
Yes. Sealer applied over dirt, salt residue or efflorescence won't bond properly, so cleaning always comes first.
Concrete cleaning typically runs $150 to $850 depending on the size of the area and the type of staining involved, confirmed with a written quote before work begins.
Yes. Oil stains typically need a specific cleaning agent applied directly to the stain in addition to the general surface wash, since pressure alone usually isn't enough to lift them fully.
Fresh oil stains usually lift well. Older, deeply set stains may lighten significantly but not disappear completely, and we'll tell you honestly what to expect before we start.
Yes, we adjust pressure and technique for stamped and coloured concrete so we clean the surface without stripping colour or damaging the texture.