Painted Brick in DFW's Climate
Painted brick is more common in DFW's existing housing stock than in most U.S. markets — mid-century and 1960s-1980s construction often featured painted brick exteriors that remain in use decades later. This painted brick faces all the soiling challenges of DFW's climate — biological growth, pollen, and chalk from UV degradation — on top of the additional sensitivity of a painted surface.
The paint film on brick is the cleaning-sensitive component. Unpainted brick tolerates aggressive chemistry and moderate pressure. Painted brick has the same chemistry-sensitive concerns as any painted surface — the paint must be in adequate condition to tolerate cleaning, and the wrong pressure or chemistry lifts or discolors the paint.
DFW's humidity creates particularly aggressive biological growth on painted brick north elevations. Mold on painted surfaces differs from mold on unpainted brick in that treating it with incorrect chemistry can discolor or damage the paint film while killing the mold — a result that's technically correct but visually unacceptable.
Safe Cleaning for Painted Brick
Assess paint condition before cleaning: peeling or severely chalked paint should not be pressure washed at any pressure. The goal is cleaning sound painted brick — deteriorating paint needs repainting before or instead of cleaning.
Use soft washing technique: 200-500 PSI with fan nozzles. The fan distribution of pressure is important — zero-degree nozzles at any pressure can lift paint at the edges of chips and cracks.
Biocide pre-treatment for biological growth: diluted sodium hypochlorite or oxygen bleach appropriate for the paint type applied and allowed dwell time before low-pressure rinsing. This kills biological growth before physical washing rather than just moving it.
Chalk removal: soft washing with light surfactant chemistry removes paint chalk from the surface, revealing cleaner paint below. This extends the life of the existing paint by removing the degraded outer layer that would otherwise interfere with adhesion when repainting is eventually needed.
When to Repaint vs. Clean
Clean painted brick delivers better results. Repainting without cleaning first traps contaminants under new paint. Blues Home Services cleans painted brick throughout DFW and coordinates cleaning with painting contractors. Call (214) 307-2127.