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Follow the manufacturer’s instructions to remove the old door. It mainly consists of carefully unlocking the door from the pulley system, then disassembling the door panels and unscrewing the rails. Be sure to remove one panel at a time or they could all fall for you.
Measure, Attach Hinges, and Handles
Measure the different areas in which the gate will be installed: door-opening height and width, standing height from the top of the opening to the ceiling, and backspace length of the garage. Headroom should be around 10 “to 12”, depending on the spring system you are installing.
For the back room, you should have the door height plus another 18 “or more space. Here you can learn commercial garage door installation & replacement details.
With the correct measurements in hand, temporarily add stops on either side of the opening, making sure they are flush with the inside edge of the door jamb.
Using the sawhorses, lay out the lower part of the new door and attach any weather stripping if necessary. In addition, attach all hinges and lifting handles in one piece.
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Put The Bottom Piece in Place
Insert the bottom piece into the door frame and use a spirit level to set the piece properly. With the piece in place, drive the nails partially into each post. Slightly bevel or bend the nails to hold them in place.
Use the manufacturer’s instructions to assemble the vertical, curved, and horizontal portions of the rail and set them aside.
Install The Remaining Panels
Install the second panel on top of the first and drive nails into the side posts to hold them in place. Install the hinges and repeat the process for the number of panels that are required. You need to anchor each part in the garage door jamb.
Install The Roles
Once all of the sections are secured, install the rollers in the section’s roller mounts. Insert the rollers with these into the assembled rail and secure the rail brackets as you move on. Make sure that the rollers are not pressed too hard against the rail, as friction can damage the door.
Secure The Rails and Attach the Springs
With the vertical rails attached to the posts, install the curved and horizontal pieces. When installing the horizontal pieces, use your previous measurements and leveling to make sure the rails are straight and pointing 90 degrees away from the opening.
Now that the rails are secured, assemble the springs according to the manufacturer’s instructions. With the help of a partner, lift the door about half its length to make sure the rails are level and parallel. When everything is set, lift the door the remaining distance and attach the springs to the pulley.
