I had them replace my 14 year old garage door. I bought a high quality insulated garage door which they did an excellent job of replacing. You might think anybody can replace a garage door but I had 2 estimates before Tri-Star and both hardware superstores said there would be problems with: the original track that was built into the wall, the uneven floor not enabling the door to seal properly, and the garage headroom not being spacious enough to have room for the insulated door. However, Tri-Star did not have a problem with any of these things that the others mentioned. And they did an excellent job. I love the new door and I like it even more now that the weather is cold and NO cold air gets into the garage. I already see myself conserving energy. The heater doesn't have to come on as much anymore. I'm very happy with it.