Dark spots and damp smells after a leak

Mold After Water Damage in Carrollton

Dark spots on a wall, a musty smell that keeps returning, or a room that stayed wet for days. Disturb as little as you can, measure the patch, and call (678) 270-2458 to describe it.

Call (678) 270-2458

What you may be seeing

Dark, fuzzy or speckled patches on a wall, ceiling or baseboard
A musty smell that comes back a few days after cleaning
Wallpaper or paint that bubbles and peels away
Window frames or corners that stay damp, with condensation on the glass
A room that has been closed up and wet for several days after a flood

Technician in a respirator scraping a mold spot from drywall

What the photo shows

Scraping at a painted wall

A technician in a green shirt and a half-mask respirator scrapes with a putty knife at dark spots on a painted wall above white wainscot. UGA's removal circular lists gloves that reach mid-forearm, eyewear without vents and a properly fitted N-95 or better respirator.

Walk away and get help if

Damp walls near outlets, switches or the panel: keep clear, and dial 911 at a spark or the smell of burning.
A ceiling sagging under wet insulation: do not stand beneath it, and dial 911 if it starts to fall.
Mold that followed sewage or dirty water: do not scrub it, and keep children and pets out. The EPA lists contaminated water among the reasons to hire a professional.
Asthma, chest tightness or a weak immune system in the household: leave the room. The EPA asks people with asthma or weakened immune systems to stay away from moldy sites.

Safe things to look at

These are looks and touches, nothing more. Stay with the ones that feel comfortable, and skip any that put you near water, wiring or a ladder.

Look and sniff first. UGA Extension says a look with the eyes and a sniff tell whether mold is present, and that testing is generally not recommended.
Measure the patch. The EPA treats anything smaller than a 3-foot by 3-foot square, about 10 square feet, as a size for do-it-yourself cleanup.
Read the room's humidity with a meter. The EPA prices them at about $10 to $50.
Photograph and date every patch, so a return in two or three days is easy to see.

What often sits behind it

Materials still wet after the 24 to 48 hour window the EPA names
Indoor humidity above 60 percent. The EPA and UGA put the aim at 30 to 50.
An air conditioner left on the constant fan setting, which UGA says returns moisture to the house
Wet insulation or a wall cavity that looked dry on the surface
Crawl space soil with no vapor barrier. UGA lists 6-8 mil.

When mold is past a scrub brush

The patch is bigger than 10 square feet or so, or the water damage was heavy. The EPA points to its commercial-building guidance in both cases.
The water came from sewage, or the heating and air system may be contaminated. The EPA advises against running a contaminated system.
The mold returns two or three days after cleaning. UGA Extension reads that as an unsolved moisture problem.

Mold mistakes that bring it back

Spraying a biocide and calling it finished.
Sealing a wet wall cavity or painting over damp drywall. The EPA says to wait until materials are dry on the inside.
Replacing insulation or wallboard before the framing reads 15% or lower, the number UGA Extension names.
Leaving the air conditioner on the constant fan setting.

Summer heat and the humidity problem

July is Carrollton's warmest month in the 1991-2020 normals: an average high of 89.6 °F, a low of 69.0 and 4.45 inches of rain.
The station counts 36.0 days a year above 90 °F.
UGA Extension says to run the air conditioner on the auto fan setting, since the constant setting returns moisture to the house.

Questions, answered briefly

How urgent is mold after a leak?

A patch under about 10 square feet on a hard surface is a 4 to 7 on the checklist; bigger patches, or any after sewage, score higher. The EPA asks for water-damaged areas to be dried within 24-48 hours to prevent mold growth.

Does bleach solve a mold problem?

NDSU Extension says mold has to be removed, not just killed with a biocide such as chlorine bleach. For hard surfaces the EPA's cleanup page names detergent and water, scrubbed and then dried completely.

Does mold work reach beyond Carrollton?

The line covers water damage in Villa Rica and Whitesburg water damage as well as Carrollton. Describe the spot, its size against a 3-by-3-foot square and how the water got there, and call (678) 270-2458.

Picking a crew for mold

For mold work, the EPA's advice to anyone hiring is to ask about mold cleanup experience and to check references. Phone numbers for the Carrollton, Villa Rica and Whitesburg offices are kept on Before you hire.

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Where this came from (9)

Checked 1 Nov 2026