Often, yes. If the metal roof and the building structure are sound, a TPO membrane can be installed over it with insulation or a cover board in between. That avoids a costly tear-off and keeps the business open.
Why owners choose TPO over metal
- No tear-off, so less cost and less disruption
- Stops leaks at old metal seams and fasteners
- White TPO reflects sunlight, which helps with cooling
What has to be checked first
- Whether the structure can carry the added weight
- Rust and fastener condition on the metal panels
- Drainage, so water does not pond on the new membrane
- Local code requirements
MDJ has installed a TPO system over an existing metal roof on a retail building in Metro Atlanta. Start with an inspection to see if your building qualifies.