My very old garage door opener finally died after about 40 years. The door itself is 8' x 10' with wood panels. It's very heavy and the old springs look really stretched out. My first question is whether anyone has a good estimate to the weight of this type of door. I bought the heaviest springs that Home Depot had, which were 160lb, and they just didn't seem to be close to what I need, plus, I believe they are intended for a door that is 7' high, not 8'. I'm thinking of purchasing 220lb extension springs for an 8 foot door from a site I found for around $53each.
I also purchased a Genie belt driven opener. The old one was chain driven and the gears gave out, most likely because of the old springs not doing their job. Is a belt driven any better or am I just asking for more problems sooner, rather than later?
Any suggestions, especially about the springs and drive type would be much appreciated.