efflorescence on brick · LaGrange, GA

efflorescence on brick in LaGrange

In LaGrange, this comes up on historic-district houses, college-side streets, and the larger lots toward Vernon Road and Callaway. LaGrange clay does not rinse off a driveway with a garden hose, and shaded brick grows a green film by late summer. New brick and retaining walls show it more. A white haze low on a wall, after rain, is the pattern.

January here is gutters full of oak, a porch that needs to look right for guests, and the odd jobs that got postponed all year.

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 LaGrange →