I had a garage door installed from Dennert five years ago for approxmately $1200. Recently a hinge failed. Upon closer inspection I noticed that a total of five hinges had already broken. Armed with my paper work/receipt and lifetime warranty I called Dennert regarding this issue. They said that the company Marathon who is the maker of the garage door (Dennert is the installer) is out of business and the ""lifetime warranty"" no longer applies. However, they will be more than happy to send a repair/technician out for $125 not including parts. Dennert was unwilling to compise on this price even though I had been their customer.
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