A completed commercial roof repair should come with more than a handshake and an invoice. For building owners and property managers in Southfield, MI, knowing what a proper repair actually looks like is the only real protection against a contractor who patches the surface but leaves the problem intact.
At Core Values Construction, we back our work with documentation and stand behind every repair we make. Call us at 517-260-3957 to schedule a free inspection and find out what your roof actually needs.
How to Tell If Your Commercial Roof Repair Was Done Right?
Michigan’s climate makes a substandard repair hard to catch at first. A poorly executed flashing patch or a seam repair that was not properly welded can look fine on a dry October day and show its failure in January when ice backs up behind it. By the time water shows up inside the building, the repair that should have taken care of the problem has been through a full freeze-thaw cycle and the original issue has had time to spread. Knowing what to check after a repair is done is how property managers catch that problem before it becomes expensive.
The first thing to verify after a commercial roof repair is whether the repaired area is actually watertight. On a single-ply membrane, that means checking that seams and patches have a continuous weld or adhesive bond with no lifting edges, voids, or bubbling. A probe tool that runs along the edge of any heat-welded patch will find unbonded sections immediately. If the contractor used lap sealant along an exposed seam edge rather than fully welding the repair, that sealant will eventually crack and separate. Sealant is not a substitute for a proper weld on TPO or PVC membrane.
Flashing repairs are the other area that most often fails after commercial roof repair. Flashings at penetrations, curbs, walls, and drains are the most common leak sources on Michigan flat roofs. A good flashing repair removes deteriorated material completely, applies new flashing that extends onto the field membrane by the appropriate width, and is terminated at the top with a proper counterflashing or metal cap. A flashing repair that was simply coated over with sealant without replacing the base material is a short-term fix that will fail again.
Commercial Roof Repair Documentation
Any qualified commercial roofing contractor should provide written documentation of every repair completed. That documentation should identify the specific location on the roof where work was done, the repair method used, the materials installed including manufacturer and product name, and the date of completion. Photos before and after the repair give you a visual record of what was found and what was done. This is not an optional extra. It is the record you need if the repair fails and you need to make a warranty claim, or if you are managing a property with multiple roofs and need to track what has been addressed.
Warranty terms for the repair itself should also be in writing. There is a difference between a contractor warranty that covers workmanship and a manufacturer warranty that covers materials. A repair completed with manufacturer-approved methods by a certified contractor can carry both. Ask specifically what the warranty covers, how long it lasts, and what the process is if the same area leaks again. A contractor who cannot answer those questions clearly is telling you something about how much confidence they have in the work.
Signs a Roof Repair Service Needs a Follow-Up
Even after a repair, a few things signal that something was missed or done incorrectly. Standing water that was not present before the repair is one. It sometimes means a drain was not fully cleared or a low spot was created by improper membrane application. New staining or discoloration on interior ceiling tiles in the weeks following a repair is another. In Michigan, it is worth doing a simple post-rain walkthrough on the roof in the weeks after a repair while the weather is still cooperative, before the first freeze locks any moisture into the assembly.
Commercial Roof Repair Experts
Core Values Construction brings over 20 years of commercial roofing experience to every repair job in Southfield, MI. We document our work, stand behind it, and treat every repair as part of the long-term health of your roof asset. Call us at 517-260-3957 and let us take a look at what your building needs even before a commercial roof repair is necessary.
FAQ
How long should a commercial roof repair in Michigan be expected to last?
A properly executed repair on a sound membrane should last several years or longer, and a certified repair with manufacturer backing can carry a formal warranty period.
Can a commercial roof repair be made during Michigan winters?
Some repairs can be made in cold weather using low-temperature-rated adhesives, though heat-welded membrane work requires temperatures above the manufacturer’s minimum threshold.
What is the difference between a patch repair and a section replacement?
A patch addresses a localized defect in the membrane, while a section replacement removes and replaces a larger field area when damage is too extensive for a patch to hold reliably.
Should a commercial roof repair trigger a full inspection?
It should, because the failure that caused the repair often signals other areas of wear on the same roof that are approaching the same condition.