The lowdown on the industry is available here.
A garage door FAQ page that is comprehensive
What are the dangers of garage door section joints?
The one thing that our specialists in Valley Center encounter on a regular basis is accidental damage both to the user and the structure. This normally happens when a child or pet gets a limb caught in the joint during opening and closing. Try to keep young children and pets away from your door and garage.
What should I consider when buying garage door locks?
Quality is one of the most important factors when choosing garage door locks. Another thing to consider is the type of the lock, like the most frequently used one, the T Bar. Then, you also need to check its price. More expensive locks will have a longer guarantee than those cheaper, inferior models.
Should I insulate my garage door?
Unless you live in a very hot region without dust, you should definitely insulate. Remember that even though you do not heat the garage, your energy efficiency is greatly affected by the air that it lets into the property. Look for a tighter seal that does not spoil the overall ambience of your home.
Can I work on the garage door on the down position?
Yes you can. However, you must pay attention to safety by disconnecting the springs and raising the door, which is a problem, given the weight. Once done, lower it again and reconnect it accordingly.
Why is it dangerous to work on garage door rollers?
According to Garage Door Repair Valley Center, the first problem is the weight of the structure which can overwhelm a grown man. The second is the tension in the springs which can surprise and hurt unless you work the up-position.