I will say this...my in laws chose Mueller to build a huge steel building on their property in 1989-90. Iron frame, on slab, fully insulated, two double wide roll doors, one walk door, one window in cabin, two room cabin with bath in one end(they finished the cabin but slab was poured with plumbing in place). The build was done by Mueller chosen builder. Ten plus years later there was rust and corrosion(some of the screws were breaking away) and black mold on insulation. Mueller reps came and inspected the entire building as well as the inside cabin.
The contracted builder put the insulation too low along the walls and it acted as a wick, drawing rainwater up between building and insulation. Mueller didn't hesitate to do the right thing and then some! They paid for a crew and POD to completely unload the garage, completely dismantled the building cut away all wall insulation, replaced insulation and added additional where needed, rebuilt garage with new steel siding, crew brought entire contents back into garage to my fil's satisfaction. New complete warranty!
This thing I think was 60x30 and Mueller even asked if they wanted to change the color of the steel and my mil said, "I would have to repaint the doors on the house if I did that so no, keep it like it is!"