Why a Cayce house shows its age on the walls before the roof does
Cayce grew up around the railroad and the river crossing, and its older streets still carry the town's working history: the painted-frame and brick houses that went up along the State Street corridor and the rail lines were built to be lived in hard, and most of them have never had a coat of maintenance that kept pace with the climate. Walk the streets behind the old commercial blocks and you see the pattern this town is known for - houses that are solid but weathered, with the south and west sides faded by years of South Carolina sun and the shaded faces gone grey-green with growth that has been building since before the last paint job.
That split is the thing to understand before you spend anything. The sun-blasted side of a Cayce house needs paint more than it needs a wash - no cleaner brings back colour the sun has cooked out of the finish. But the shaded side, the elevation that looks at the neighbour's lot or the tree line instead of the street, is almost always a cleaning problem rather than a painting one. Mildew and algae are what grey it, and they are alive. Soft washing kills them at the root. When we quote a Cayce house we separate those two so you are not paying us to wash a wall that actually needs a painter, or paying a painter to cover a wall that needed washing first.
The two ways Cayce houses turn green, and why they are not the same job
Most people describe it as one problem - "the house is dirty" - but there are two very different stains at work on a Cayce wall, and they need different handling.
- The grey-green organic film. River-corridor humidity and heavy shade keep a Cayce wall damp longer than almost anywhere else in the Midlands, and that damp grows a living film of mildew and algae that roots into the surface texture of siding, stucco, and old mortar. It is the film that greys a north wall and makes a screened porch ceiling look tired. A cleaning solution breaks it down and rinses it away, and because the growth is dead rather than just knocked off, the wall stays cleaner longer.
- The reddish-brown mineral band. Red clay is everywhere in Lexington County, and rain splashing off beds and walkways throws it up onto the lower two or three feet of wall. Below a certain height the same elevation that greens higher up carries an orange-tan clay cast instead. Clay is not alive, so chemistry alone does not lift it - it needs the surfactant and the dwell time that let it release from the surface, and then a rinse that carries it off without streaking.
Both respond to soft washing. The difference is that a crew that only blasts water will wet the film without killing it, and a crew that only sprays solution will clean the middle of the wall and leave the clay band at the bottom looking unfinished. The walkaround is where we tell the two apart, which is why every Cayce quote starts on the ground, looking at the actual elevations, rather than from a square-footage chart.
Brick and painted frame: the two old Cayce materials that set the method
Old Cayce is a brick town and a painted-frame town in about equal measure, and the two materials force the whole approach.
The brick is the delicate one. A lot of it was laid in the era of softer, lime-rich mortar that was intended to be the weak point of the wall - it gives rather than cracks the brick. A century of river humidity has left plenty of those joints soft and friable. Point a pressure wand at an aging mortar joint and you erode it, and the water you drive in finds its way behind the wall. Once that joint is gone the fix is repointing, which is a masonry bill created entirely by the wrong cleaning method. Old Cayce brick is soft washed at low pressure, with the solution doing the lifting, and we check a joint in an inconspicuous spot before committing to a whole wall.
The painted frame is a different caution. Much of the older painted stock went up before lead paint was banned, so the finish may contain lead, and blasting it disperses whatever is in the paint into the yard and the air. The safer rule is the same one the brick demands: low pressure and a solution, never force. Where the paint is already checked or lifting, washing will find those weak points - and we would rather flag them before we start than have you discover peeled paint after the rinse dries.
River silt lines and the flood-adjacent house
The houses that sit lowest, along the streets that drop toward the Congaree and the Cayce and West Columbia Riverwalk, carry a mark that inland houses do not: a fine grey silt line that rides the lower wall and foundation after the river comes up. The Congaree floods its banks periodically, and when it does the silt settles on whatever sits in its reach. It is not the red clay of the higher lots and it is not organic growth - it is mineral sediment, and it behaves more like the clay band than like mildew.
For the riverside and low-lying Cayce properties, silt is worth naming because it changes what a quote has to include. A wash aimed only at the green above the silt line leaves the grey band looking exactly as it did, and the silt can stay damp and hold moisture against the foundation long after the floodwater is gone. We treat that band deliberately and rinse it thoroughly so nothing is left to hold water against the house. If your street has flooded in recent years, say so when you call - it is the single most useful piece of information for quoting your house accurately, and it changes the job more than the square footage does.
What a full wash takes in on a Cayce house
A Cayce house wash is not one pass over the siding. The surfaces that carry the film and the clay are the ones the climate and the clay actually reach, and they are worth listing so a quote is an honest one:
- The walls on all elevations, but especially the shaded north side and anything facing the tree line or the river, where the film lives longest.
- The splash-zone band along the base, which carries the red-clay cast and needs the surfactant and dwell time the upper wall does not.
- The soffits and the underside of porch ceilings, which grey first on a shaded Cayce porch and are the part you see when you sit outside.
- The trim around windows and doors, and the exterior faces of gutters and downspouts, so the clean line runs all the way around the roofline.
- On low-lying lots, the silt band at the foundation line that a standard pass would leave behind.
Window glass gets a rinse as part of the house wash, but a truly streak-free finish is window cleaning and is priced on its own. Roof growth needs a different method and sits on our roof cleaning page, and the concrete and driveways around the house belong to driveway and concrete cleaning - most Cayce homeowners book the house and the flatwork together, because the difference is most obvious side by side.
Old Cayce paint: wash first, paint second, in that order
There is a sequencing point that saves Cayce homeowners real money, and it is worth saying plainly. If you are planning to repaint an older frame house, the wash has to come first and the paint has to go on a clean, dry, growth-free surface. A painter needs the mildew dead and the chalk washed off for the coating to bond, and that is exactly what a soft wash provides. Painting over a filmed wall - or worse, over a wall that was pressure-blasted and left the growth behind - traps the problem under the new coat and you pay for the whole job twice.
Give the washed surface time to dry before the painter starts. In river-corridor humidity that can take a couple of clear days rather than the twenty-four hours a can of paint suggests, especially on the shaded elevations that stay damp into the morning. If you are not sure whether your house needs washing, painting, or both, the honest answer is usually in the material: green and grey film is a washing problem, faded and chalking colour on the sunny side is a painting problem, and a wall that has both needs the wash first.
Irrigation rust on the Cayce lots that water from wells
On the outer Cayce lots and the properties toward West Columbia and the county line that irrigate from wells, an orange-brown fan on the siding is often not clay at all - it is iron out of the water. A sprinkler head throwing well water against the wall leaves the iron behind when it dries, and it builds up in the exact band the spray reaches. Rust does not respond to the cleaning solution that kills mildew; it needs a dedicated rust treatment, and it comes straight back if the head keeps hitting the same spot. We will point that pattern out when we see it and price it honestly rather than fold it into a wash and watch it return next watering season.
Reading a Cayce estimate the right way
The number that matters in a Cayce quote is not the per-foot rate - it is whether the job names the surfaces above and accounts for the clay band, the shaded elevations, and, where it applies, the silt line. If a quote treats a riverside house with a silted foundation the same as a dry lot on higher ground, whoever wrote it has not looked at your property. We quote flat, up front, after a walk of the actual house, and if the property turns out to be more than the photos suggested, that is our estimating error, not a change order. If you are weighing the method itself, our guide on soft washing versus pressure washing walks through which surfaces need which, and the house washing cost breakdown covers what drives the price on a Midlands house.
