Unlike a pitched roof that sheds water by gravity alone, a flat roof relies on a coordinated system to stay dry. The membrane itself must resist moisture, the drainage points must remain clear, and a subtle built-in slope has to guide water toward those outlets. When any part of that system falters, water begins to pool on the surface. Pooled water is more than a cosmetic issue; the sustained weight and moisture exposure gradually wear down even a sound membrane, opening the door to leaks that can spread quickly once they start. The team at Cornerstone Roofing Solutions evaluates every layer of a flat roof before recommending a fix. We match our repair approach to the exact membrane installed on your Kemp, TX property, restoring its ability to shed water and hold up under ongoing weather exposure.
Flat Roof Membranes We Service
Every flat roofing membrane calls for its own set of tools, adhesives, and repair methods. Using the wrong approach on the wrong material can loosen bonds and shorten the life of an otherwise sound roof. Our crews are cross-trained on every major membrane type found on Kemp, TX properties.
TPO (Thermoplastic Polyolefin)
Now the standard choice for new flat roof installations. TPO seams rely on heat-welding for a secure, lasting bond. Our repairs include surface cleaning, priming, and welding a matched TPO patch into place or reworking failed seams.
EPDM (Rubber Roofing)
A flexible rubber membrane frequently found on older residential and commercial flat roofs. We restore EPDM systems using seam tape, membrane-safe adhesives, or liquid rubber compounds designed to match the existing material.
Modified Bitumen (Mod-Bit)
An asphalt-based membrane usually installed in overlapping layers. We repair mod-bit roofs using torch-down or cold-adhesive patching, chosen based on the roof's construction and the condition of the surrounding material.
Built-Up Roofing (BUR)
A classic tar-and-gravel system built from stacked plies of bitumen and fabric reinforcement. Our process removes the gravel layer at the repair site, cleans the exposed area, then rebuilds it with matching plies and bitumen.
Signs Your Flat Roof May Need Attention
Because flat roof damage tends to build slowly and out of sight, it can go unnoticed for months while it quietly worsens beneath the surface. Catching these signs early lets us intervene before moisture reaches the framing and decking below.
Water Sitting Two Days or Longer
A properly functioning flat roof should drain within roughly 48 hours. If water lingers longer, it usually points to a clogged drain, a sagging membrane, or insufficient slope, all of which need prompt evaluation.
Bubbling or Raised Sections
Bubbles form when moisture or air becomes trapped beneath the membrane surface. These pockets weaken the roof at that exact spot and tend to split open once sun and temperature swings take their toll.
Seams Pulling Apart
Seams remain the weakest link in almost any flat roofing system. Lifted edges, visible gaps, or discolored strips along a seam usually mean the bond has failed and repair is overdue.
Cracked, Alligator-Pattern Surface
A cracked, scaly surface on a mod-bit or BUR roof signals heavy sun damage and shows the membrane has lost most of its ability to flex and repel water.
Water Marks Inside the Building
Ceiling stains or dripping water beneath a flat roof section confirm that the membrane above has already failed and repair should not be delayed.
Loose Flashing Around Parapet Walls
Flashing that has pulled away, warped, or shifted along a parapet wall or roof edge gives water a direct path around the membrane, which can soak the substrate over a wide area.
How We Approach Flat Roof Repair
A dependable flat roof repair starts with accurately locating every failure point, then preparing the surface and choosing materials suited to that specific membrane system.
Complete Roof Evaluation
Our crew walks the entire membrane, checking seams, flashing, penetrations, drains, and parapet walls. Suspicious spots are probed by hand and every finding is logged to shape an accurate repair plan.
Moisture Detection and Mapping
When trapped moisture is suspected, we scan the roof using non-invasive equipment to pinpoint where insulation or decking beneath the membrane has become saturated, so we never patch over hidden problems.
Removal of Damaged Material
Sections of membrane that are torn, blistered, or waterlogged are cut out. Any wet insulation or deteriorated decking underneath is swapped for dry, compatible material before rebuilding begins.
Cleaning and Priming the Surface
Each repair zone is cleaned down and primed with products matched to the membrane in place. Getting this step right is what determines whether a repair lasts or fails early.
Applying the Membrane Repair
Our technicians apply the correct method for each system: heat-welded seams for TPO, specialty adhesives for EPDM, torch or cold-process patching for modified bitumen, and rebuilt plies for BUR roofs.
Drain and Flashing Check
Every drain is cleared, tested, and resealed while flashing around edges and penetrations is inspected and repaired or replaced, closing off any remaining path for water to enter.