Guide · Stain Removal
A good house wash or driveway clean handles the everyday grime: algae, mildew, dirt, spider webs. But a handful of stains are chemical problems, not dirt problems — and each needs its own treatment. Here's what oxidation, rust, efflorescence, soot, and oil actually are, how they come off, and our honest odds for the hard cases.
Every stain in this guide has one thing in common: blasting it doesn't work. Rust and oil smear and spread under a jet of water. Oxidized vinyl can end up permanently streaked by high pressure — the jet cuts clean lines through the chalky layer that no amount of rewashing evens out. The professional approach is the same pattern every time: the right detergent for the stain, time to dwell, gentle agitation, and a thorough rinse. The chemistry does the work.
If your vinyl siding looks hazed-over, faded, or slightly orange where it used to be a rich colour, that's oxidation — years of UV breaking down the surface of the vinyl itself, leaving a fine chalky film. It shows worst exactly where the sun works hardest: south- and west-facing walls, and it's most visible on deep colours like blues, greens, and reds, which is heartbreaking, because those are the houses that look best when the colour is true.
The finger test: wipe a dry finger firmly across the siding. If it comes away with a powdery residue the same colour as the wall, you've got oxidation — and a regular house wash won't remove it, because the film is the surface, not something sitting on it.
Removal is a restoration process: an oxidation-dissolving detergent applied at low pressure, given time to dwell, then agitated by hand with soft brushes, panel by panel, and rinsed. Done right, the original colour comes back evenly across the wall — no painting, no new siding. It's slower and more hands-on than a soft wash, which is why we quote it from photos rather than a flat-rate table.
Rust stains always have a story. The usual suspects around here:
Rust bonds to the surface minerally, so it needs a dedicated rust-dissolving treatment — and here's the counterintuitive part: the bleach-based detergents that make house washing work so well on algae can actually set rust darker. It's a different problem needing different chemistry, which is why rust removal is its own line of work rather than part of a standard wash. Where the source is still there (that chimney cap), we'll point it out — otherwise the streak comes back with the next rain.
That white, powdery — sometimes crusty — bloom on brick, block, stone, and concrete is efflorescence: moisture moving through the masonry dissolves natural salts inside it and carries them to the surface, where the water evaporates and leaves the salt behind. It's common on newer masonry, retaining walls, and foundations, and brushing it just spreads it around.
Cleaning uses a wash formulated to neutralize and dissolve the salts, applied gently — high pressure drives water into masonry, which is exactly the mechanism that causes the problem. One honest caveat: because efflorescence comes from within, it can return if water keeps moving through the material. If it does, the long-term fix is about moisture — drainage, grading, sometimes sealing — and we'll tell you if that's what we're seeing.
Soot — around a chimney, above a barbecue, after a fire pit mishap — is fine, oily carbon, and water alone smears it into grey ghosts. It comes off with degreasing detergents, dwell time, and careful agitation, worked from the outside of the stain inward. The greasier the source (barbecue vs. wood smoke), the more the treatment leans on the degreaser.
Oil is the one stain we will never guarantee — and we'd be careful with anyone who does. Concrete is a sponge: a fresh drip sits mostly in the top layer, but an old stain has had months or years to soak deep into the pores, well below where any surface treatment reaches.
What we can tell you from experience:
We'll look at a photo, tell you honestly which category yours is in, and quote accordingly — that's the "no surprises" rule applied to the least predictable stain there is.
Stains vary too much for the flat-rate tables we use for everything else, so specialty stain work is quoted from photos — text a picture of the stain to (705) 242-4888 and you'll get a firm number. Most stain treatments piggyback nicely on a house wash or driveway clean in the same visit, which keeps the cost down.
Yes — the detergent dissolves the chalk layer, the brushes are soft, and the rinse is low-pressure. The danger to oxidized siding isn't the restoration, it's high pressure or harsh scrubbing before restoration.
Not by itself — but if the source is still there (a rusting chimney cap, iron-heavy sprinkler water), new staining will build again. We always point out the source so you can decide whether to fix it.
On a fresh drip, absolutely: soak up what you can immediately, then dish soap or degreaser, a stiff brush, and a hot rinse. If it's older or that doesn't get it, send us the photo before scrubbing harder — some DIY products can discolour the concrete around the stain.