Be careful: garage doors with tension springs should be removed while they are in the up position, not blocking the entrance, so make sure there is no tension being applied to the door while you are trying to remove the spring. Don’t forget that once you do, there is nothing holding it up. You should probably also try to keep in mind that most garage doors can weigh more the n two hundred pounds, and this isn’t to be taken lightly. If you don’t have anyone to help bear the weight, clamp down the back track to keep it in place. But the best strategy is to have a removal partner.
Next, you have to take out each door panel by removing the pins in each of the braces in turn- each brace should loosen and pop right out. Be sure to do this very very slowly, as the panels are heavy and unwieldy.
The next thing you have to do it take down the tracks from the old door, which will be screwed or bolted down with brackets, and remove the technology that prevents the door from shutting when there is an object obstructing its path. This will usually be a little infrared laser mount by the sides of the door. Don’t forget, while removing the track- you have to support that long, awkward shape once it has been loosened.
Next, get rid of the old header trim and the two-by-fours so you’re re-framing the actual opening, allowing for new equipment for the new door. Attach the new two-by-fours with nails, and you’re ready to go.