efflorescence on brick · Greenville, GA

efflorescence on brick in Greenville

In Greenville, this comes up on courthouse-square homes and the commercial rooms around them. Square-side walks collect clay from the county every wet week. New brick and retaining walls show it more. A white haze low on a wall, after rain, is the pattern.

A square-facing door is a winter project: lights, glass, and the sweep at the threshold.

Mildew is green or black and biological. Efflorescence is white, crusty, and chemical in the mineral sense: salts dissolved inside the masonry, carried out, and left when the water evaporates. Killing it is the wrong idea. It was never alive. A mild, appropriate cleaning can remove the crust that is already on the face. If the wall keeps wicking water, the crust returns.

We will not attack historic brick with muriatic acid because a homeowner wants it “bright.” Acid on the wrong brick is how faces dissolve. If acid is even on the table, it is a specific masonry decision, named in the quote, not a default.

If the white showed up with a leak, a bad cap, or irrigation on the wall, fix the water or you will hire the wash again. We will point at the likely source. We will not rebuild the wall.

The full explanation, without the town attached, is the white crust on brick is salt, not mildew article. The town does not change the chemistry. It changes the houses, the shade, and the clay.

Brick and masonry cleaning in Greenville →