If your flat roof is leaking, you need a repair that addresses the source and a clear understanding of how the completed work will be checked. That starts with identifying the roof system, what failed, and which repair materials and methods are suitable.
For flat roof repair in Ypsilanti, MI, contact Armor Commercial Roofing to discuss your commercial building, existing roof system, and leak history. Whether the property has parapet walls, rooftop equipment, or internal drains, those details matter when planning the work.
Got a leak? Call (517) 617-6953 to discuss your roof and request an estimate.
Quick Answer: What Does Flat Roof Repair Include?
A proper flat roof repair involves investigating the leak source, addressing damaged membrane, seams, or flashing with compatible materials, and evaluating drainage near the affected area. Completion checks depend on the system and may include seam inspection, suitable testing, or observation after rainfall. If damage is widespread, a localized repair may not be the right answer.
Signs Your Flat Roof Needs Repair
- Water stains or drips on ceilings, especially after rain or snowmelt.
- Standing water that remains on the roof for days.
- Bubbles, blisters, or soft areas in the roof surface.
- Seams that are lifting, curling, or visibly open.
- Cracked or loose flashing around walls, curbs, or pipes.
- Unexplained changes in heating or cooling demand, which may warrant checking insulation along with other possible causes.
Defects We Repair and the Right Method for Each
Different roofs fail in different ways. Each repair needs materials and preparation compatible with the existing system. Common defects and repair approaches include:
- Open or separated seams: EPDM seams may be repaired with approved primer, tape, and flashing products. TPO and PVC seams may be rewelded or covered with a compatible welded strip where the existing membrane can accept a sound weld.
- Punctures and cuts: Damage from service work, tools, or debris is patched using compatible materials. EPDM repairs commonly use approved primers and tapes, while TPO and PVC patches are commonly heat-welded.
- Blisters: Built-up and modified bitumen roofs can develop blisters from trapped air or moisture. Small, stable blisters may be monitored. Damaged blisters require repairs appropriate to the system, with wet materials addressed before closure.
- Open laps and splits: Modified bitumen repairs may involve resealing laps or installing compatible sheet patches using an approved application method.
- Membrane shrinkage at edges: Shrinkage on aging EPDM can stress wall and corner details. Repairs must address that stress and rebuild affected flashing rather than simply covering an opening.
- Bare or worn surfacing: Suitable asphalt-based roofs may need protective surfacing restored according to the system’s requirements.
- Wet insulation: Confirmed wet insulation needs appropriate removal and replacement, along with inspection of the exposed deck, before patching the roofing above it.
One rule applies across every system: use approved, compatible repair products. Unapproved asphalt roof cement on a single-ply membrane, or a TPO patch used as a welded repair on PVC, can create an unreliable repair and complicate future work.
Not sure what type of flat roof you have? Identifying the system is an important part of assessing suitable repair options.
Drainage Checks: Fixing the Cause, Not Just the Leak
Drainage problems can contribute to leaks or leave repaired areas exposed to recurring standing water. A repair assessment should consider:
- Interior roof drains: Debris, damaged or missing strainers, and the condition of the membrane connection and clamping assembly.
- Scuppers and gutters: Blockages, damage, and flashing at roof outlets.
- Downspouts: Obstructions and whether discharge is directed appropriately away from the building.
- Ponding areas: Recurring standing water, residue, and low spots that warrant further evaluation.
- Drainage around repairs: Whether a slope or drainage correction is needed as part of a durable solution.
Confirm whether drain cleaning or other maintenance is included in the repair scope.
Michigan winters add another challenge. Ice can obstruct outlets and cause snowmelt to back up around seams and flashing. For another Michigan location, see our page on flat roof repair in Holland, MI.
Flashing Checks
Flashing connects the roof to walls, edges, and penetrations. These transitions are common leak points and should be evaluated where relevant to the repair:
- Parapet walls: Loose termination bars, separated counterflashing, open laps, and damaged coping joints.
- Roof edges: Loose metal, failed stripping, and open joints.
- HVAC curbs and skylights: Damaged corners, loose membrane, and deteriorated terminations.
- Pipe boots and vents: Cracked boots, loose clamps, and failed seals.
- Pitch pans: Shrunken, cracked, or separated sealer around penetrations.
Problems beyond the immediate leak area should be documented so their urgency and any additional repair scope can be discussed. Water entering through masonry or coping above the roof can also resemble a membrane leak.
The Limits of a Localized Repair
Spot repairs are appropriate in many cases, but not every case. A localized repair may make sense when:
- Damage is limited to specific areas.
- The surrounding membrane remains suitable for repair.
- Any wet materials within the affected area can be addressed.
- The remaining assembly has sufficient serviceable life.
A localized repair may not be enough when:
- Investigation confirms extensive wet insulation.
- Leaks keep appearing in different locations.
- Seams or flashing are failing across large areas.
- The membrane is extensively deteriorated, cracked, or worn through.
- The deck has significant damage.
In those situations, repeated patching may cost more over time than a broader solution. Findings should explain the roof’s condition and help compare repair, restoration, and replacement. Restoration is only suitable when the existing assembly qualifies for the proposed system.
How Completed Work Is Checked
Completed repairs should be checked using methods appropriate to the roofing system and the agreed scope. These may include:
- Seam inspection: Check cooled thermoplastic welds and EPDM repair seams using the manufacturer’s specified method.
- Patch inspection: Review the bond, patch dimensions, edges, and flashing details.
- Controlled water testing: Where suitable, testing may help investigate whether a suspected entry path remains open.
- Drainage review: Check for obstructions and whether repairs interfere with water movement toward outlets.
- Photo documentation: Record repaired locations and the work completed.
- Observation after rain: Monitor the interior leak area and arrange further investigation if water continues to appear.
Before approving work, confirm the included checks, documentation, and follow-up terms. For related repair information, see our page on flat roof repair in Kalamazoo, MI.
Why Ypsilanti Property Owners Choose Armor Commercial Roofing
Contact Armor Commercial Roofing to discuss your building’s repair needs. A useful proposal should identify the roof system, observed defects, compatible repair approach, and any conditions requiring further investigation.
Confirm the contractor’s credentials, estimate terms, included completion checks, and any applicable warranty in writing. Those details help you compare the proposed scope and understand what the repair is intended to address.
Schedule Flat Roof Repair in Ypsilanti, MI
A small leak can lead to wet insulation, damaged ceilings, and a larger repair. An assessment can help identify the source and determine whether localized repair is appropriate.
Contact Armor Commercial Roofing or call (517) 617-6953 to discuss flat roof repair in Ypsilanti, MI and request an estimate.
Frequently Asked Questions
How much does flat roof repair cost in Ypsilanti?
The cost depends on roof type, access, damage, preparation, and any wet insulation or deck repairs involved. An assessment and written scope provide the basis for a project-specific estimate. Contact Armor Commercial Roofing to discuss pricing and estimate terms.
Can you repair a flat roof in winter?
Often, yes, when safe access and product application requirements can be met. Some conditions call for temporary protection until a permanent repair is possible. The appropriate method depends on the membrane, weather, and repair surface.
Why does my flat roof keep leaking in the same spot?
Possible causes include an unresolved entry point, unsuitable repair materials, inadequate preparation, movement, or deteriorated surrounding roofing. Wet insulation and drainage problems may also need investigation.
How long will a flat roof repair last?
Repair life depends on material compatibility, preparation, installation quality, surrounding roof condition, drainage, and maintenance. A properly installed repair can provide lasting protection, but its lifespan is not guaranteed to match the remaining roof life.
Do you repair older buildings in downtown Ypsilanti?
Contact Armor Commercial Roofing with the building’s location, roof type, and known problems to discuss the scope available for your property. Older roofs with parapet walls or internal drains need particular attention to wall transitions, coping, drainage, and deck condition.