AC Drain Pan Overflow Restoration
DFW Attic & Ceiling Drying
DFW summers run air handlers hard. A condensate drain that worked fine in April can clog by July, and an attic AC overflow shows up as a stain on the ceiling, brown water dripping from a recessed can, or a sagging spot of drywall over the master bedroom. Flood Titan Restoration is IICRC Certified Firm #70249559. We FLIR-scan the attic, map the wet footprint, dry to S500 standards, and bill the carrier directly. Owner-operated, locally based in Southlake.
Why DFW Air Handlers Overflow
In a North Texas summer, an attic air handler can pull 8 to 15 gallons of condensate out of the air per day. All of it has to go somewhere. When the path out of the drain pan gets blocked, it has only one direction left: down through your ceiling.
Algae Clog in Primary Drain
The number one cause we see. Condensate sits in PVC drain lines that run dozens of feet through the attic. Algae and biofilm build up over the cooling season. Eventually the line is fully blocked. Primary pan fills. Then secondary pan fills. Then your ceiling starts dripping.
Secondary Pan Drain Missing or Blocked
The emergency overflow pan under your air handler is supposed to catch primary pan failures. It needs its own drain or a float switch that kills the system. Many DFW installs have a secondary pan but no working drain and no float switch, so when the primary fills, the secondary just fills too.
Float Switch Failure or Bypass
Newer installs have a wet switch in the secondary pan or on the drain line that cuts power to the AC when water is detected. If it has been bypassed, has a dead battery, or was wired incorrectly, the AC keeps running and condensate keeps coming.
Coil Sweat from Poor Insulation
Less common but worth checking. If the evaporator coil cabinet is not properly sealed or the ductwork insulation is degraded, the coil itself sweats outside the drain pan and drips into the attic. Looks like an overflow but is actually a condensation problem.
The Hidden Damage Pattern
AC overflow water is technically Cat 2 grey water per IICRC S500 because the condensate has been sitting in a drain line that grew algae and biofilm. It carries microbial contamination and dust from the coil. That changes the scope: any porous material it touched (drywall, insulation, carpet pad) is replaced, not dried, once it is identified as overflow water.
The damage you see on the ceiling is usually a small fraction of the actual wet footprint above. A six-inch brown stain on the bedroom ceiling typically traces back to a four-foot-square area of saturated cellulose or fiberglass insulation in the attic, plus the top of the drywall sheet on the other side of the wall. We FLIR scan from the attic side before deciding what comes out.
If You See A Brown Ring on the Ceiling, the Attic Is Already Wet
A ceiling stain is the tail end of the leak, not the start. By the time the stain is visible, water has been ponding on the back of the drywall (and in the insulation) for hours or days. Speed of response is what saves the ceiling sheet from replacement.
What We Do When We Arrive
Step 1: Kill the Source
AC powered off at the disconnect or thermostat to stop the condensate generation. We coordinate with your HVAC company on the drain clear (or do an emergency clear ourselves if needed) so the system can run again as soon as the structure is dry.
Step 2: Map Real Wet Footprint
FLIR thermal scan from both sides of every affected ceiling. Moisture meter readings on insulation, drywall, and any wood structure (top plates, joists) within the migration path. We document the actual wet area so you do not pay to replace dry drywall.
Step 3: Insulation Removal & Antimicrobial
Saturated insulation comes out (it cannot be dried in place once contaminated with overflow water). EPA-registered antimicrobial pretreatment applied to exposed framing and back side of drywall per S500 ยง12 Cat 2 protocols.
Step 4: Controlled Ceiling Demolition (Only If Needed)
If drywall is sagging or sheetrock paper is delaminating, the section comes down. If readings show the sheet is dryable, we cut a small access hole in an inconspicuous spot and dry from the cavity side. Texture match later is far easier with smaller cuts.
Step 5: Attic Drying Chamber
Attic drying is harder than living-space drying because DFW summer attic temps are 130°F+ and humidity loads are high. We set LGR dehumidifiers calibrated for attic conditions plus air movers to force evaporation. Equipment runs 24/7. Moisture readings logged daily.
Step 6: Document & Rebuild
Photo log, FLIR images, daily moisture logs, Xactimate scope, insulation R-value restored to code, drywall patch, texture match, paint. Same crew start to finish.
Related Water Damage Causes We Handle
Slab Leak
In-slab copper pinhole, FLIR detection, hardwood and subfloor drying.
Burst Pipe
Freeze burst, supply line failure, attic line, in-wall break.
Water Heater Flood
Tank failure, pan overflow, garage or attic flood scope.
Attic & Roof Leak
Saturated insulation, ceiling stains, hidden moisture in batts.
Cat 3 Sewage Backup
Black water, full PPE, antimicrobial scope, structural tear-out.
All Water Damage Services
Full water damage restoration hub for DFW homeowners.
AC Overflow Questions Homeowners Ask Us
AC Overflow Right Now?
The longer the attic insulation stays saturated, the more drywall and structural material crosses from dryable into mold-risk territory per IICRC S520. Allan or a credentialed Flood Titan technician answers our line directly.
Trusted Credentials
IICRC
Certified Firm #70249559
BNI Member
Southlake Business Builders Chapter
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