Mold in Walls & Drywall in Dayton, TX

How to tell it's inside the wall

• Paint that blisters or flakes in one area while the rest of the wall looks fine
• Baseboards that are swollen, stained or pulling loose
• An odor that is worst when the AC cycles off on a hot afternoon
• Black or green spotting along the bottom edge of drywall in a closet
• A wall that feels cooler or damp to the touch

What drives wall moisture in Dayton

Dayton, founded as West Liberty, sits about three miles west of the Trinity River on US 90, around 38 miles from Houston, with a BNSF rail yard just south of town. During Hurricane Harvey, releases from Lake Livingston into the Trinity matched the 1994 record, and more than 7,000 homes across Liberty County were affected, about 800 with major damage or worse. A home that took water then and had walls dried rather than opened can still hold mold behind the paint. Most cases, though, start inside the house: an attic air handler whose drain line clogs, a slow leak at a shower valve, or a window that lets in rain during long Gulf storms. In a humid climate, a wall that stays wet for two days is a likely place for growth.

Cost considerations

Angi's Houston cost data reports mold removal at an average of $2,016, typically $863 to $3,329. National ranges (HomeGuide, 2026) list jobs of 100 to 300 square feet at $1,500 to $6,000, which is where multi-room flood damage tends to land. Costs rise with the height and length of drywall removed, wet insulation, and fixtures that block access. You'll also pay a mold assessment consultant separately, because Texas bars one company from assessing and remediating the same job.

What happens when you call

An independent local company will ask what you're seeing, what's behind the wall and whether the house has flooded. A consultant who holds a TDLR license inspects and writes the protocol, a separate remediation contractor carries it out, and the consultant checks clearance before the wall is closed. For the rebuild, the City of Dayton Building Division under Planning & Development Services issues residential permits; plan review for new construction can take up to 10 days, and inspections are generally required for each permit.