Paint or water?
Rust fanned across white siding. A chalky bloom on brick. A brown ring on a ceiling. Homeowners read all of it as a paint problem — and sometimes it is, but often the paint is just where the evidence landed. Answer two questions and this decoder names what you are actually looking at, then splits the fix into the half a painter does and the half a painter cannot touch.
Every stain has two answers, and no single trade owns both.
Wash a rust fan off a wall and repaint it, and if the sprinkler that put it there is still running well water, the fan comes back. That is not a bad paint job — it is the right answer to only half the question. The other half lives in the water, and a painting company has nothing to treat it with.
So we built this decoder with Water Filtration 1 (opens waterfiltration1.com in a new tab), a water treatment company here in Spanish Fort. They wrote the chemistry, we wrote the surfaces, and every verdict below carries both halves — stop the source and restore the surface — even when one of them turns out to be nothing.
Which it often is. Of the 9 findings in the decoder, only 4 have a cause anyone can treat in the water. The rest are moisture, biology, groundwater under a slab, or sunlight, and the decoder says so instead of inventing a reason to send you somewhere.
Answer both and the verdict appears here — including the cases where the answer is “your water is not doing this.”
All 9 findings, and where each one goes
The decoder narrows to one. Here is the whole set, if you would rather read than click — including the 5 that have nothing to do with your water.
Iron staining
The tell: The stain has a direction — it fans, streaks or arcs, and it is worst wherever a sprinkler head can reach.
Stop the source: Well and irrigation water treatment on waterfiltration1.com (opens in a new tab)
Restore the surface: Pressure washing
Hard water scale
The tell: A cloudy film or a scatter of hard spots that a rinse will not shift, ending in a clean line exactly where the spray stops.
Stop the source: Water softener installation on waterfiltration1.com (opens in a new tab)
Restore the surface: Pressure washing
Efflorescence
The tell: The white is coming OUT of the masonry, not sitting on it, and it returns in the same patch after rain.
Stop the source: not a water treatment problem
Restore the surface: Stucco and masonry painting
Mildew and algae
The tell: It favours shade. North elevations, under the roof edge, behind a shrub, the damp corner of a bathroom.
Stop the source: not a water treatment problem
Restore the surface: Pressure washing
Copper corrosion from acidic water
The tell: Blue-green or turquoise, and it always starts below something metal — a tap, a spigot, a fitting.
Stop the source: pH correction and acid neutralising on waterfiltration1.com (opens in a new tab)
Restore the surface: nothing to paint here yet
Hydrogen sulfide and iron in well water
The tell: Dark gray or brown marks around fixtures and drains, plus a rotten-egg smell — worst on the hot side.
Stop the source: Whole-house carbon filtration on waterfiltration1.com (opens in a new tab)
Restore the surface: nothing to paint here
Trapped moisture or a slow leak
The tell: A brown ring with a hard edge on a ceiling, or paint blistering off a bathroom or laundry wall.
Stop the source: not a water treatment problem
Restore the surface: Drywall repair and painting
Painted concrete letting go
The tell: Paint lifting off a slab in sheets or coin-sized discs, often with a damp patch under the piece that came away.
Stop the source: not a water treatment problem
Restore the surface: Floor painting
UV chalking
The tell: Colour rubs off on your palm, and the whole elevation has gone flat and thirsty-looking rather than stained in patches.
Stop the source: not a water treatment problem
Restore the surface: Exterior painting
If you already know which half you need
Surface work
- Pressure washing — rust, scale and mildew that has not bitten in
- Exterior painting — chalking, and stains washing will not lift
- Stucco and masonry painting — efflorescence and salt-damaged coatings
- Drywall repair and painting — ceiling rings and blistered bathroom walls
- Floor painting — painted slabs releasing from below
- Interior painting — once a damp room is drying out properly
The water half
These go to waterfiltration1.com. We do not treat water and will not pretend to quote it — but the decoder tells you which of these a given stain points at, which is the part that is hard to look up.
The same decoder, from the water side(opens waterfiltration1.com in a new tab)Send us a photo of the stain.
A clear picture of the mark and a wider shot of the elevation is usually enough for us to tell you which half of the problem you have — and whether we are even the right call.
Know it's the paint?
We'll come look at it, tell you what caused it, and email a written quote for putting it right.