If you chose to install rolling steel roll up doors, it can be quickly installed by two trained professionals. But if you want to install it yourself, it will take you less than an hour to accomplish it with the help of another person. Don't burden yourself with such a task. Leave it to the experts.
Now to find the best one for the job, you have to search your area for one. Go and talk to every garage door installer in town. As you inquire with each one, take note of the ones who listen to your concerns. After you're done with the inquiries you must already have a shortlist of companies you're willing to do business with.
You can pick the roll up garage door and opener on your own or you can avail a package that the companies have to offer. These include the materials and installation costs. You could ask a formal written quote from the contractors. That way you can easily compare their prices.
Don't be taken as a fool by cheap deals offered by some. If the deal is too good to be true then it probably is one. Be wary of contractors wanting to see the inside of your garage. He can do the measurements on the outside. If he is too eager to see your interior then he's probably just casing your house. There are instances that the contractor supplies the materials and installs it but he didn't pay the supplier. You'll be paying double for the materials.
Getting a contractor to install your roll up garage door is the best solution in this situation. They know how to get the job the proper way. They know all the right techniques to finish the job the fastest. Also don't save on the materials. The savings you get from cheap materials can actually cost more in the long run.