Fits This Service
Patch And Reflash
- What You See
- A split seam or one punctured spot
- Insulation Below
- Dry when cored
- Repair Method
- Weld or adhere a new cover piece
- Next Step
- Watch it after the next storm
Flat Roof Repair
Scranton Flat Roof Repair Contractor
Flat Roof Repair For Split Seams, Blisters, And Ponded Drains
As a Scranton flat roof repair contractor, we fix membrane seams, blisters, drains, and low spots on commercial roofs, then tie each repair into dry roofing.
- Roof SystemsTPO, EPDM, Built-Up, Mod Bit
- Common CallWater Standing Near Drains
- Moisture CheckCore Cuts Before Patching
- Winter WorkTemporary Seals Until It Warms
Is This Roof A Fit?
Is This A Scranton Flat Roof Repair Job?
Scranton flat roof repair fits most low-slope leaks. These columns show when a patch holds and when the roof needs more.
Rebuild Around The Drain
- What You See
- Rings of standing water at a drain
- Insulation Below
- Damp in a small circle
- Repair Method
- Lower the bowl and add tapered fill
- Next Step
- Clear strainers each season
Replace A Section
- What You See
- Soft, spongy roofing across a bay
- Insulation Below
- Wet across the bay
- Repair Method
- Cut out to dry boards and rebuild
- Next Step
- Talk through the rest of the roof
What We Find
Flat Roof Repair Problems on Scranton Buildings
Low-slope roofs here fail in four common ways, and each one has its own cause.
- Foot Traffic
Flat Roof Blister Repair
You SeeRaised bubbles in the membrane, worst along the path to rooftop units.
What It MeansTrapped air or moisture lifts the layers. Blisters on walkways get cut, dried, and patched because boots split them open.
- Drainage
Flat Roof Ponding Water Repair
You SeeDark rings and puddles still sitting two days after rain stops.
What It MeansSettled insulation or a drain set too high holds water against seams. The fix happens at the drain and in the insulation shape.
- Freeze
Seams Split By Freeze And Thaw
You SeeLap edges curling up along the field of a TPO or EPDM roof.
What It MeansWater in a loose lap freezes and pries it wider. New cover strips go over cleaned, primed membrane on both sides.
- Age
Alligatored Built-Up Roofing
You SeeCracked, crazed asphalt surface with bare felts showing near the edges.
What It MeansOld built-up roofs dry out and crack. Core cuts show whether a patch will hold or the area needs a new membrane.
Repair Methods
Scranton Roof Repair Methods For Flat Membranes
The material decides the method, so the roof system gets confirmed before any patch is cut.
Heat-Welded TPO Patches
Hot air fuses a new TPO piece to cleaned membrane, and each weld gets probed along its edge.
Taped EPDM Cover Strips
Primed rubber takes seam tape and a cover strip, rolled flat so no channel is left for water.
Modified Bitumen And Built-Up Patches
Cut-out areas get matching plies set in compatible adhesive, with granules or coating over the top.
Drain Rebuilds With Tapered Fill
Insulation around a high drain is cut back and replaced with tapered boards so water runs to the bowl.
Fail And Fix
What Flat Roof Repair Fixes Around Scranton
Each repair answers one failure on the roof. Here is what goes wrong and what we do about it.
- What Fails
Water That Will Not Drain
Ponded water sits on seams and soaks through any small opening it finds.
What The Repair DoesRaising low areas with tapered fill or lowering the drain sends water to the outlet within hours.
- What Fails
Blisters On Service Paths
Foot traffic splits raised membrane, opening a direct path into the insulation.
What The Repair DoesWe cut the blister, dry the area, patch it, and add walkway pads where boots cross most.
- What Fails
Opened Laps
Freeze cycles pry loose seams wider every winter until rain runs under them.
What The Repair DoesCleaned, primed laps get new cover strips that extend onto firm membrane on both sides.
- What Fails
Hidden Wet Insulation
Wet boards under a dry-looking membrane keep feeding water to the ceiling.
What The Repair DoesCore cuts find the wet area, and the soaked boards come out before the roof is closed up.
Water Standing On Your Flat Roof?
Take a photo of the puddles after rain stops and call us. We check the drain height and the insulation underneath.
How A Repair Runs
Steps In A Flat Roof Repair Visit in Scranton
Five steps take a flat roof from a leak report to a finished, marked repair.
- 1
Identify The Membrane
TPO, EPDM, built-up, and modified bitumen each need their own repair materials, so the system is confirmed first.
- 2
Probe Seams And Drains
Lap edges get probed by hand, and drains are checked for height, clamping rings, and debris in the strainer.
- 3
Core The Wet Spots
Small cores near the leak show how far moisture spread through the insulation under the membrane.
- 4
Patch Or Rebuild
Repairs extend onto dry, firm membrane, and wet boards are replaced before the roof is sealed again.
- 5
Mark The Repair Map
Each patch, drain, and wet area found goes on a roof sketch with photos for your records.
Related Repairs
Other Repairs Flat Roofs Need
Flat roofs often carry metal canopies, traced leaks, or plant equipment that call for a related repair.
Commercial Metal Roof Repair
Metal canopies and penthouse roofs often sit beside a flat roof and leak at their own screws and laps.
Where Water Gets In- Screws with split or missing washers
- Corrosion hidden under panel laps
- Pipe boots cracked at the flange
Commercial Roof Leak Repair
When the drip is far from any seam or drain, tracing the water across the deck comes before the patch.
Where Water Gets In- Coping joints above the wall flashing
- Edges and gutters blocked by ice
- Flashing at rooftop unit curbs
Industrial Roof Repair
Flat plant roofs crowded with fans and stacks need repairs staged around the work happening underneath.
Where Water Gets In- Fan curbs loosened by vibration
- Drain outlets above production lines
- Stack collars near hot exhaust
Questions
Scranton Flat Roof Repair Questions
Asked Most
Why does my flat roof leak in heavy rain?
Heavy rain fills the roof faster than a partly blocked drain can empty it. Rising water reaches weak seams and flashing that stay dry in a light shower.
We follow the drainage path, check low areas, and connect the roof conditions to where water shows up inside, because the entry is often away from the drip.
What limits flat roof repair in winter?
Ice, wet membrane, and cold temperatures limit which materials will bond or cure. We check safe access first. A temporary seal can hold until the roof warms and dries, and the paperwork notes which permanent work is still waiting.
Does a blister on a walkway need a different repair?
Yes, location matters. A blister on a service path splits under foot traffic, while one in an open field can stay stable for a while. We identify the roof system, check for splitting and moisture, and plan the patch before cutting anything.
Can ponding repair involve work under the membrane?
Often it does. Sagging insulation, a low deck, or a drain set too high causes the ponding. A surface patch closes a hole, while tapered fill or a lowered drain changes the shape that keeps collecting water.
Can a flat roof be repaired over wet insulation?
Patching over wet boards traps the water and lets it keep spreading. We core the area, remove soaked insulation, and replace it before the new membrane goes on, so the repair has a dry base.
Hire a Scranton Flat Roof Repair Contractor
Send a photo of the ponding or the split seam. We inspect the roof and quote the repair.