Getting the roof right on a new commercial build in Southfield, MI, is one of the most important decisions in the entire project, and the mistakes that happen here tend to be expensive ones. At Core Values Construction, we handle new construction roofing for commercial projects across Michigan and have seen firsthand what goes wrong when these details are missed. Call us at 517-260-3957 to talk through your project before it breaks ground.
New Construction Roofing Mistakes That Can be Easily Avoided
The most common mistake is treating the roof as an afterthought in the project schedule. New construction roofing needs to be coordinated with the structural frame, insulation system, and mechanical penetrations from the beginning. When roofing is bolted onto the project plan late, the result is rushed installation windows, sequencing conflicts with other trades, and details that get skipped under deadline pressure.
Michigan commercial projects face a real installation window. The roofing phase needs to be planned around the state’s weather calendar, not squeezed in whenever the framing crew clears the deck. A new construction roofing system installed in marginal conditions at the end of October is starting its service life at a disadvantage.
Under-sizing the Insulation Assembly in New Constructions
New construction is the best opportunity to build a high-performing roof assembly, and the insulation layer is where most of that performance lives. Specifying the minimum required R-value to hit budget targets leaves energy performance and long-term membrane durability on the table. Rooftop temperatures on an under-insulated commercial roof in a Michigan summer run significantly higher, and that thermal stress accelerates membrane aging from the first season.
The insulation layer also affects how the membrane handles Michigan’s freeze-thaw cycle. A well-designed assembly keeps the dew point within the insulation and away from the membrane interface. When that calculation is skipped or the insulation is undersized, moisture migrates into the assembly and creates the blistering and delamination problems that show up a few years into the roof’s life.
Skipping Proper Membrane Attachment Verification
On a new construction roofing project, every attachment point matters. Mechanically fastened single-ply systems require fastener pull-out testing to confirm the deck can hold the specified pattern under wind uplift loads. Southfield and the broader Metro Detroit area sit in a wind zone that demands proper verification, not assumptions based on deck material alone.
Fully adhered systems have their own verification requirements around substrate moisture content and adhesive coverage. A membrane that looks correct on the surface but has voids in the adhesive layer is a membrane that will fail at those voids when uplift pressure finds them. These checks are not extra steps. They are how you confirm the system you specified is actually what got installed.https://www.corevaluesconstruction.com/best-commercial-roofing-services-in-plymouth-mi/
Flashing Details in a New Construction Roofing Project
Flashings at walls, curbs, drains, and penetrations are where new construction roofing systems fail first, and they are also where contractors are most likely to rush when a project is behind schedule. Every HVAC unit, every pipe boot, every roof drain needs to be flashed and terminated correctly before the project is signed off.
On a new build, getting this right costs almost nothing compared to the repairs it prevents. On an existing roof, going back to fix poor flashing details means cutting into finished work and potentially voiding warranty coverage. The time to detail every penetration properly is during construction, not after the building is occupied and tenants start reporting leaks.
Start Your New Construction Roofing the Right Way
Avoiding the most common new construction roofing mistakes comes down to early planning, proper specification, and a contractor who understands what a commercial roof in Michigan actually needs. At Core Values Construction, we bring 20 years of commercial roofing experience to every new construction project we work on. Call us at 517-260-3957 and let us get involved early when it still matters most.
FAQ
When should a roofing contractor be brought into a new construction project?
Before the structural drawings are finalized. Early involvement allows the roofing system to be coordinated with the deck, insulation, and mechanical layout from the start.
Does new construction roofing in Michigan require a specific membrane type?
No single membrane is required, but TPO, PVC, and EPDM are the most common commercial choices. The right system depends on building use, insulation requirements, and budget.
What causes new commercial roofs to fail early?
Rushed installation timelines, inadequate insulation, missed flashing details, and lack of post-installation inspection are the most common causes of early failure on new builds.
Is wind uplift testing required on new commercial roofs in Michigan?
Yes. Most commercial roofing specifications require pull-out testing to verify fastener performance in the actual deck before the membrane is installed.