Commercial property owners in Ann Arbor eventually reach a point where repair alone no longer makes sense for an aging roof. Commercial roof replacement often involves choosing between two approaches, and understanding the trade-offs beforehand can save a building owner from costly missteps.
Call Core Values Construction at (517) 260-3957 for commercial roof replacement in Ann Arbor, MI.
Commercial Roof Replacement Options
A full tear-off removes the existing roofing system down to the deck, providing a clean surface for the new roof. An overlay, or recover, installs a new membrane over the existing roof instead. The right choice depends on the condition of what is already there.
The condition of the existing insulation is one of the biggest factors. If insulation beneath the current membrane has absorbed moisture or degraded, an overlay traps that material in place, causing performance issues even under a new membrane. A tear-off allows insulation to be inspected and replaced instead.
The number of roofing layers already present also matters, since local codes often limit how many roofing layers a structure can carry for structural and fire reasons. A building already overlaid once may not qualify for a second overlay, making tear-off the only compliant option.
Weight becomes a greater concern with each additional layer. Older buildings were not always engineered for multiple roof systems, and an experienced contractor can determine whether the structure can safely support an overlay.
Comparing TPO, EPDM, and PVC
Once the choice between a tear-off and an overlay is settled, the next choice involves selecting a replacement membrane. TPO is a widely used single-ply option known for balancing upfront cost with long-term performance, with a service life that typically spans two to three decades. It performs well across a range of building types and is often a practical choice for straightforward applications.
EPDM has a long track record and is valued for its flexibility and resistance to temperature swings, making it well suited to Michigan’s seasonal extremes. It tends to carry a lower material cost than some alternatives, though seam performance depends heavily on installation quality. Many EPDM systems rely on adhesive-bonded seams rather than heat-welded seams.
PVC offers strong chemical resistance, making it a common choice for buildings with rooftop equipment that may expose the membrane to oils, grease, or other substances. It often carries a higher upfront cost, but that can be justified for buildings with specific exposure risks.
Making the Right Commercial Roof Replacement Choice
Choosing among these systems requires considering how the building will be used over the life of the new roof, not simply which option costs the least today. A restaurant or manufacturing facility with heavy rooftop equipment may benefit from PVC even at a higher cost, while a straightforward office or retail building is often well served by TPO. A property expected to change hands within a decade may not require the highest-cost system, while a building intended for long-term, specialized use may benefit from a system built for that demand.
Commercial Roof Replacement Services
Commercial roof replacement is not a one-size-fits-all decision. The right approach depends on the condition of the existing roof, applicable code restrictions, structural capacity, and how the building will be used going forward.
For commercial roof replacement in Ann Arbor, MI, contact Core Values Construction at (517) 260-3957 today.
FAQ
What is the difference between a commercial roof tear-off and an overlay replacement?
A tear-off removes the existing roofing system down to the deck before installing a new one, while an overlay installs a new membrane directly over the existing roof. Tear-off allows the insulation and deck to be inspected and replaced, while an overlay is generally faster and less expensive but depends on the roof’s existing condition.
How do I know which replacement membrane system is right for my Ann Arbor commercial building?
The right system depends on your building’s use, any rooftop equipment or chemical exposure, budget, and how long you plan to own the property. A contractor can weigh these factors alongside the building’s structural requirements and the condition of the existing roof to recommend a suitable system.
How long does a commercial roof replacement typically take, and does the building need to close during the work?
Project timelines vary depending on roof size and project scope, ranging from a few days for smaller buildings to several weeks for larger projects. Most commercial roof replacements can be completed while the building remains occupied, since the work takes place on the roof itself.