We try our best to complete each job in one trip. However, occasionally a follow up visit may be required. New doors can take anywhere from 2 to 8 hours depending on how big or complex the job is. Repairs take much less time. A spring can be replaced in 30 minutes, rollers in about 15. The more knowledgeable the technician, the less time a job will take them. This doesn't mean they're cutting corners, just that they're very experienced and good at what they do. If you hire someone to fix a broken spring and they take 2 hours to do it, they may not be very good at what they do.