Both systems need periodic inspections and seam checks, but EPDM repairs are simpler while TPO requires specialized welding equipment.

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EPDM repairs involve cleaning the damaged area and applying a patch with adhesive or seam tape. These repairs can be done quickly by maintenance staff or roofing contractors without specialized tools. EPDM's flexibility allows it to conform to roof irregularities, which reduces stress points that could develop leaks.

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TPO repairs require heat welding to bond patches to the existing membrane. This ensures a watertight seal but demands trained technicians with the right equipment. TPO's white surface shows dirt and debris more readily than black EPDM, so it may require occasional cleaning to maintain appearance and reflectivity. Both systems benefit from annual inspections to identify and address minor issues before they become major problems.