As a Louisville flat roof repair contractor, we fix split seams, loose flashing, blisters, and ponding on TPO, EPDM, modified bitumen, and built-up roofs.
A Louisville flat roof repair contractor sorts each flat roof section into one of three paths, and moisture readings under the membrane decide which path fits.
Flat roof trouble shows up in three places. Each sign below names the roof detail it traces back to.
Water spilling over a parapet wall in heavy rain means a scupper or drain is choked and backing up.
Open joints in the coping cap let wind-driven rain run down behind the base flashing.
Ceiling stains below an HVAC unit or exhaust fan point to curb flashing or a puncture on the service path.
A leak that appears only after hours of steady rain points to a seam lap slowly soaking through.
Dirt rings around a drain show water sitting where it should flow, often because the drain sits high.
An edge you can lift at a TPO or EPDM lap has lost its weld or adhesion.
Raised bubbles on built-up or modified bitumen roofs come from moisture or air trapped between plies.
Each repair matches the membrane already on the roof, so the patch and the field around it age together.
TPO patches are hot-air welded after the aged surface is scrubbed with membrane cleaner. EPDM patches go down with primer and seam tape, then lap sealant at the edges. Long seam failures get one continuous cover strip.
Broken, soft, or traffic-path blisters get an X cut, the plies folded back, the insulation checked, and the plies reset with adhesive under a patch that overlaps solid membrane. Small intact blisters get marked and watched.
Wet-surface mastic, a peel-and-stick patch, or a tarp weighted at the edges slows water when a permanent repair has to wait. Each patch is logged, then replaced with matched material in dry, workable weather.
Repair keeps a flat roof working when the damage sits at seams, flashings, and drains rather than across the whole field.
Matched welds and taped patches close split laps with material that moves and ages like the membrane around them, so the repair holds through the seasons.
Clearing strainers, lowering a high drain, or adding a cricket moves water off the membrane instead of leaving it to soak one low spot.
Rebuilt base flashing at parapets and curbs shuts the vertical joints where most flat roof leaks begin on commercial buildings.
Stopping water at the lap keeps the insulation boards below from soaking, which protects the deck and keeps each repair area small.
Clear the strainer if you can reach the drain safely, move stock away from the drip, and call us to set up a flat roof repair.
Call UsSend the address and the membrane type if you know it, such as TPO, EPDM, or built-up. We will schedule a free inspection.
Schedule Free InspectionEach flat roof repair follows the same sequence, from probing seams to logging what was fixed.
We walk the membrane field, probe seam laps beside the leak, and check base flashing, curb flashing, and every drain clamping ring upslope of the stain inside the building.
Moisture readings and small cores show whether insulation under a seam or blister is wet. Wet boards get cut out and replaced before any new membrane goes over them.
Strainers get cleared, high drains reset, and crickets placed so water moves to the outlet. Measuring water depth after a rain helps size the fix for a stubborn pond.
Damaged membrane is cleaned back to fresh material, primed or scrubbed, and covered with a TPO weld, an EPDM tape patch, or a reinforced ply that overlaps solid roof.
Photos and a marked roof plan show each patched seam and flashing, so the next visit finds temporary patches and watch areas quickly and the follow-up work goes faster.
Many buildings carry more than one roof system, so a flat roof job often turns up work on another.
Backed-out screws, open end laps, and rust at gutters on exposed-fastener and standing seam panels get matched repairs.
Metal roof repair →
Leak tracing runs from the ceiling stain uphill to the seam, curb, or pitch pan that lets water in.
Leak repair →
Plant roofs are repaired around production, with exhaust fan damage and foot-traffic punctures handled in sections.
Industrial roof repair →Plain answers on the flat roof problems owners call about most.
Seams, flashings, and drains, where the membrane changes direction or meets another material. Open field areas leak far less often. On Louisville flat roofs the usual sources are opened seam laps, base flashing peeling off parapet walls, curb flashing at HVAC units and exhaust fans, loosened drain clamping rings, and punctures along service paths.
The area is cleaned back to fresh membrane and covered with a matching patch that extends well past the damage. TPO patches are hot-air welded after the aged surface is scrubbed with membrane cleaner. EPDM patches use primer and seam tape, with lap sealant along the edges.
Broken, soft, or traffic-path blisters get cut open and repaired, while small intact ones are often marked and watched. Most appear on built-up and modified bitumen roofs, where trapped moisture or air lifts the plies.
By improving the path to the drain, since patching the membrane under a pond leaves the low spot in place. Fixes run from clearing strainers and leader pipes to lowering a drain that sits high, adding a cricket around a curb, cutting a new scupper, or installing tapered insulation under a new section.
Temporary repairs can go on, while permanent membrane repairs wait for a dry surface and temperatures inside each product's limits, since primers, adhesives, and seam tapes all have minimum application temperatures. Meanwhile, wet-surface mastic over a split seam, a peel-and-stick patch on a toweled-dry area, or a weighted tarp slows the water.
Tell us which section of the flat roof leaks and what membrane it carries. We will set up a free inspection and a written estimate for the repair.