Flat Roof Repair in Wausau, WI
Plenty of central Wisconsin homes have a flat roof somewhere: a back addition, a three-season porch, an attached garage, a dormer deck, or a low-slope section over a lake cabin's living room. Those small flat sections cause more than their share of leaks. Snow drifts onto them and sits for months, ice builds up where they meet the house, and many were covered decades ago with roll roofing or a rubber sheet that was never flashed properly into the wall. A lot of shingle roofers won't touch them. We repair flat and low-slope roofs on homes the same way we do on commercial roofs. We find where the water actually gets in, fix the cause instead of smearing tar over it, and tell you honestly when a section costs less to replace than to patch again.
What's included
- Leak repair on porch, addition, garage and dormer flat roofs
- EPDM (rubber) roof seam, flashing and puncture repair
- Modified bitumen and roll-roofing repair
- Wall flashing where a flat roof meets the house
- Ice-dam leak repair where a flat section meets a sloped roof or wall
- Low spots and ponding corrected with tapered insulation or re-sloping
- Scupper, gutter and downspout repair on flat sections
- Skylight and roof-hatch curb flashing
- Small flat roof replacement when repair no longer makes sense
Sound like your roof?
Not sure what is wrong or what it should cost? If any of these sound familiar, tell us about the roof. We'll tell you what it probably is, then confirm it on the roof and give you a written price before any work starts.
- A stain on the ceiling under a porch roof or back addition
- Water coming in every spring when the snow melts
- Cracked, alligatored or blistered roll roofing
- Black tar smeared over the same spot more than once
- Rubber membrane pulling away from the wall or the edge
Leaking right now? Protect the inside first
Move inventory, files and electronics away from the drip, shut off power to any light fixture or panel that is getting wet, and put down buckets or plastic. Keep people out from under a ceiling that is sagging with water above it. Don't send staff onto the roof during a storm, in the dark, or when it is icy or snow-covered. Low-slope roofs have skylights, open edges and slick membranes. Then request service: an active leak can usually be dried in temporarily until a permanent repair is possible.
From the first call to a dry roof
Tell Us About the Roof
The building, the roof type if you know it, and what is happening: an active leak, a stain, ponding water, storm damage, or a roof that is just getting old. Active leaks go to the front of the line.
Roof Assessment
We walk the roof, trace the problem, check the drains and flashings, and take core samples or moisture readings where the insulation might be wet.
Written Options and Price
You get a written scope and price. When more than one approach makes sense, repair, coating and replacement are laid out side by side with what each one buys you.
Work Done and Documented
The work is done to the manufacturer's specification, and you get a photo report and any warranty paperwork for your files.
You may also need
Commercial Roof Repair
Leak tracing and repair on every common low-slope system, including EPDM, TPO, PVC, modified bitumen, built-up and metal, with photos of what failed and a written price before work starts.
Learn moreEmergency & Storm Repair
Active leaks, wind-peeled edges, hail damage, fallen limbs and ice-dam leaks on flat and commercial roofs: dried in or tarped first to stop the water, then repaired properly, with photos for your insurer.
Learn moreReplacement & Installation
New EPDM, TPO, PVC and modified bitumen roofs for warehouses, plants, offices, retail, churches, schools and apartment buildings, as a full tear-off or a code-compliant recover, with drainage fixed while the roof is open.
Learn moreFlat Roof Repair — FAQs
Most residential flat roof repairs, such as a seam, a wall flashing or a puncture on a porch, garage or addition roof, run about $300–$1,800. Replacing a small flat section outright is often $2,500–$7,000 depending on size, material and whether the decking underneath is rotten.
Flat porch and addition roofs usually leak where they meet the house. The flashing between the flat roof and the wall or the shingled roof above is the weak spot, and in winter that corner is exactly where snow piles up and ice forms. Low spots that hold water come a close second.
Usually only when the load gets heavy, such as deep wet snow or snow topped with ice, and only with a plastic shovel or roof rake, leaving a few inches on the roof so the membrane isn’t cut. See snow load on flat roofs.
Roof cement can buy time in an emergency, but it is not a repair. It dries, cracks and pulls away within a season or two, especially through a Wisconsin winter, and layers of it make the real repair harder. A proper patch uses the same material as the roof, bonded or welded to clean membrane.
Yes. Low-slope sections on cabins, boathouses and lake homes are common across our service area, usually in EPDM rubber or modified bitumen. Tell us the access situation when you send the request.