Flat roof repair in Little Rock for ponding, blisters and seam leaks

Low slope roofs are not truly flat. They are built with a gentle pitch toward drains, scuppers or gutters, and when that drainage works, water leaves the roof quickly. When it does not, water sits, and standing water finds every weak spot.

The most common leak points are seams between sheets, flashing where the roof meets parapet walls or the house, curbs around HVAC units, pipe boots, and the drains themselves. Punctures from dropped tools, fallen limbs or foot traffic are next on the list.

Inside, water often travels along the deck or insulation before it drips, so the stain on your ceiling can be several feet from the hole. We track it from the roof side using the slope, the membrane condition and, when needed, a careful water test.

Rooftop equipment adds its own leak points. Condensate lines from HVAC units sometimes drain right onto the membrane, service techs leave screws and panels lying on the roof, and curbs around old units that were moved or removed are often patched in a hurry. We check each one while we are up there.

Ponding water is water that stays on the roof well after rain stops. Over time it breaks down membranes and coatings, adds weight to the structure, and collects dirt and leaves that hold even more water.

The cause might be a clogged drain or scupper, a deck that has sagged, or insulation that has crushed and lost its slope. Clearing drains is quick. Fixing a low spot usually means adding tapered insulation or crickets under new membrane so water moves toward the outlet.

A quick way to spot ponding from the ground is to look for rings of dirt or algae on the roof surface after it dries. Those rings mark where water sat, and they tell us exactly where to look first.

• Clear clogged drains, scuppers and downspouts
• Add tapered insulation to build slope into low spots
• Install crickets behind curbs and chimneys
• Raise or rework scuppers that sit above the water line

A repair should use the same family of material as the roof. TPO is welded with hot air, so we heat weld new TPO patches and seam strips. EPDM rubber is repaired with primed seam tape and cured EPDM patches. Modified bitumen gets torch or cold applied patches of matching cap sheet.

Older built-up tar and gravel roofs, still found on some central Arkansas commercial buildings and older homes with flat additions, need the gravel cleared, the plies cut back, new felt and hot or cold asphalt applied, and the gravel replaced.

Mixing incompatible products causes trouble. Asphalt based cement on EPDM, for example, softens the rubber and fails. We identify the membrane first and use repair materials made for it, which keeps the fix lasting and avoids voiding manufacturer terms on newer roofs.

• Water still standing on the roof two days after rain
• Ceiling stains below a flat porch, addition or office roof
• Bubbles or blisters in the roof membrane
• Seams lifting or splitting along sheet edges
• Drains or scuppers clogged with leaves and needles
• Cracked flashing at parapet walls or HVAC curbs

Blisters show up as raised bubbles in the roof surface, usually where moisture or air got trapped between layers. Small, firm blisters can be left alone and watched, but large or broken ones are cut open, dried, and patched.

Splits and cracks appear as membranes age, often along seams or where the roof meets walls. Shrinkage is common on older EPDM, which pulls away from edges and tents up at corners. Each of these is repairable when caught early, but they tell us the roof is aging, and we will say so.

Summer sun hits flat roofs head on, and dark membranes can get extremely hot. That heat dries out older roofs, speeds up cracking, and causes membranes to expand and contract every day. Reflective coatings or white membranes help on roofs that see full sun.

Spring storms bring hail that can bruise modified bitumen and puncture older single ply membranes, plus heavy rain bursts that overwhelm small drains. After a big storm, it is worth having a flat roof checked even if no leak shows yet, since water can spread under the membrane for weeks before it reaches a ceiling.

Pine needles and oak leaves are the other enemy. They slide to the low points, clog drains, and turn into wet mats that hold water against the roof. Twice a year cleanouts make a real difference on roofs near trees.

Not every flat roof should be patched forever. If the insulation below is soaked across large areas, if the membrane is cracked all over, or if leaks keep showing up in new places, repair money may be better spent on a recover or a new roof.

A recover adds new insulation board and membrane over a sound, dry existing roof, which can cost less than a full tear-off. Building codes limit how many roof layers are allowed, so a recover only makes sense when there is a single existing roof and the deck below is solid. Moisture readings help us tell which areas are dry enough to keep.

We give you a straight answer with photos of what we found, and a written price for the repair before work starts. If a larger fix makes more sense, we price that too, so you can compare.

Flat roof repair pricing depends on the membrane type, how easy the leak is to find, and whether drainage needs work.

Wet insulation discovered under the membrane is the most common reason a flat roof repair grows beyond the first estimate, and we price it before doing it. See the full roof pricing guide.