Sellers Roofing Company · Commercial buildings and multifamily properties
Commercial Roof Repair in Saint Paul, MN
A leaking flat roof needs an investigation, not just another layer of sealant. Sellers Roofing Company assesses commercial roof leaks, damaged membrane details, flashing, and drainage concerns in Saint Paul and the Twin Cities.
Call (651) 703-2336 with the property address, leak location, and roof-access information. Availability, weather, and safe access determine the response plan.
What should a property manager do when a roof starts leaking?
Keep people away from wet electrical equipment and unstable ceilings. From a safe location, record where water appears, when it started, and what the weather was doing. Contact the roofing contractor and building manager. Do not send untrained staff onto a wet, icy, or damaged roof to locate the opening.
Move contents only when it is safe to do so. If there is an immediate danger from electrical exposure or structural instability, keep the area clear and contact emergency services or the appropriate qualified professional.
Our starting point: trace the leak and define the repair
- Gather the history. Identify recurring leak locations, previous patches, rooftop equipment work, and available warranty information.
- Compare inside and outside observations. Water can travel through the assembly before appearing indoors, so the stain may not sit directly below the entry point.
- Inspect accessible roof details. Review membrane seams, punctures, flashing, terminations, drains, scuppers, and penetrations relevant to the reported problem.
- Explain what remains unknown. A visual inspection cannot establish the condition of every concealed layer. Moisture investigation or opening a sample area may require a separately agreed scope.
- Set out the recommended work. Distinguish temporary protection from permanent repairs and identify the work, materials, limitations, and follow-up in writing.
More about commercial leak investigation · Roof condition inspections
Common commercial roof repair needs
Membrane openings and seams
Punctures, separated details, and worn repairs require material identification and compatible repair methods. A patch over contaminated or deteriorated material may leave the underlying problem unresolved.
Flashing and penetrations
Roof-to-wall transitions, equipment curbs, pipes, and perimeter details deserve attention. The repair scope should explain whether the issue involves the membrane, termination, adjoining surface, or several components.
Drainage concerns
Debris, blocked outlets, and low areas need different responses. Drainage changes should account for the existing roof and building; do not assume that a coating or isolated patch will correct water accumulation.
TPO, EPDM, and PVC repairs are not interchangeable
Before specifying a repair, identify the actual membrane and any existing warranty requirements. TPO and PVC use thermoplastic welding details; EPDM uses its own compatible seam and flashing products. Preparation, moisture conditions, substrate condition, and the manufacturer’s instructions affect the repair method.
For modified-bitumen, built-up, or coated assemblies, the existing layers and condition also matter. Send any available roof plans, material labels, installation records, or warranty documents with your inquiry. Do not apply an unidentified roof cement or coating as a universal repair.
When does repair make sense instead of replacement?
A targeted repair may be appropriate
The defect is localized, the surrounding roof remains serviceable, and a compatible repair can address the cause. The inspection still needs to consider affected materials and the remaining condition of the assembly.
A broader evaluation may be needed
Leaks keep returning, failures occur in multiple areas, moisture is suspected beneath the membrane, or drainage and deck concerns remain unresolved. These findings do not automatically require replacement, but they call for more than another surface patch.
Where replacement is recommended, ask for the findings that support it and whether a staged repair or budget-planning option is reasonable. Review commercial roof replacement planning.
What affects the commercial roof repair price?
The repair area alone is not enough to price the work. Access equipment, safety setup, membrane type, wet materials, flashing complexity, investigation time, weather limitations, and occupied-building protection can change the scope.
- Ask whether investigation and temporary protection are included.
- Separate roof-surface repairs from insulation, deck, interior, or mechanical work.
- Require approval before expanding the scope for concealed conditions.
- Clarify repair warranty terms and any effect on an existing manufacturer warranty.
We do not quote a universal repair price on this page. Request a written assessment of your building and compare the inclusions, exclusions, and repair limits.
A repair record you can use later
Before authorizing work, ask for a record of the reported problem, the area investigated, repair locations, materials, photographs where available, and unresolved concerns. Keep it with previous inspections and warranty documents. That history helps the next investigation and supports maintenance planning.
In Minnesota, weather and surface conditions affect safe access and repair preparation. Discuss whether temporary protection is needed until permanent work can be completed under appropriate conditions.
Commercial roof repair questions
Can you guarantee that every leak will be found on the first visit?
No inspection can establish every concealed condition without appropriate investigation. Intermittent leaks may require weather history, further testing, or follow-up. The scope should explain the investigation limits and the next step if the source is not yet confirmed.
Does hail automatically mean the roof must be replaced?
No. The assessment needs to distinguish actual damage from age-related wear, prior repairs, and other conditions, then consider whether the damage is localized or more extensive. A storm date or hail report alone is not a roof diagnosis.
Can tenants remain in the building during the repair?
That depends on the damage, work method, and building conditions. Discuss protected entrances, work-zone separation, noise, odors, and equipment coordination before work. Unsafe interior areas should remain restricted until the relevant hazard is addressed.
How do I arrange a repair assessment?
Contact Sellers Roofing with the address, roof type if known, leak history, and the person responsible for access. Do not climb onto the roof to gather photographs for the request.
Get the leak assessed and the repair scope in writing
Sellers Roofing Company · Saint Paul and the Twin Cities