Garage Doors in Applewood HillsRepair or replace?
An honest answer.

Both work when matched to the door. Steel rollers are durable and cope with heavy doors but run louder; nylon rollers with sealed bearings are noticeably quieter and need less attention, which suits an attached garage under a bedroom. What matters more than the material is the stem length and wheel size matching the hinges and track, and replacing all the rollers together so the door rides evenly on every one.

A strut is a horizontal steel stiffener fastened across the inside of a section to keep it from bowing. Wide doors, top sections where the opener arm pulls, and bottom sections that take knocks are the usual places for them. If your damaged section had a strut, the new one gets a straight strut refitted or replaced. If a top section bowed because it never had one, adding a strut is part of putting it right.

Sometimes. Many insulated doors have the seal channel moulded into a plastic cap that wraps the bottom rail, which takes a specific profile rather than a generic one. If that cap is cracked or the channel has opened, a screw-on aluminum retainer can be fitted over the rail so a standard T-style or bulb seal can be used from then on. Identifying the retainer at the first look settles which route applies.

It is a motorised deadbolt, offered as an accessory by some opener makers, that slides a bar into the track each time the door closes and withdraws it before the door opens, all controlled by the opener. It gives the physical security of a manual lock without the need to remember it. It can sit alongside a manual lock kept for outages, or take its place entirely.