Garage door on mine is 198cms. Flat roof and roof joist to floor measurement is 204cms. Door needs quite a bit of internal clearance due to the way it arcs (as said above) reckon you need at least 3 to 4 ft of clearance if your using the full hight!
These would fit mine: http://www.diy.com/departments/european-redwood-single-garage-door-h1981mm-w2134mm/75320_BQ.prd