OC Transpo is fixing a problem with the fiberglass coating on roofs on some of its double-decker buses.

OC Transpo stresses the problem is minor and doesn't affect passenger safety.

In a statement to CTV Ottawa, OC Transpo stated,  'At no time did we ever lose a piece of metal off the roof of the bus", stated James Greet, Manager of Transit Fleet Maintenance.

The statement says repair work on the buses is being completed during off peak hours and weekends

Two double-decker buses were not available for service Monday because they were scheduled for warranty repairs.

The cost of the repair is covered by the manufacturer, Alexander Dennis of Scotland, which is replacing the adhesive.

The double-decker buses had problems with the ventilation system and condensation two years ago.