I bought their horse shed last Jan, in the middle of winter
I built it up by myself with only a trusty Craftsman corded drill, granted it took me 3 months of weekend hours including the ground prep, concrete pillars (PITA), all the sheet metals. The instructions were precise and thorough. The most impressive part was that it came in 3 long crates with hundreds of parts, and they did not miss a single piece, including the special parts they fab'ed for me to meet the local (Colorado Jefferson County) building codes. I was nervous with our county's strict snow load and wind speed criteria, and the inspector was impressed how thorough and well-built the Versatube shed was. I agree!
What really impressed me was that the each parts had been cut and formed so precisely that I didn't even have to bang anything with my hammer. Just drop and drill (all self tapping screws).
One of the pain was to dig eighteen 3' deep holes due to the local freeze line requirement. Luckily Jan was nice enough (very unusual last year) to use water to aid my digging. But this process took 3 weeks.
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The frames went up like building a Lego house. It was that well made.
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Surely I had to cut some sheet metals, but I managed to do all with a pair of (good) tin snips. Sure, my hands were sore after all that cutting but it was still manageable. Much thicker than what you would buy at home depot, and VersaTube sent 3 different sizes of sheet metals to minimize the cutting and wasted tin. My horse still managed to made dents in it afterward but would not have been any issue if it was just a garage.
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I bought some extra tins to do some other stuff like the windows and other things. And to repair where our horses would destroy, it's just a matter of time.
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Overall I'm very satisfied with VersaTube's willingness to work with the local codes, their product quality that includes perfectly formed tubes and precise cuts so I didn't have to do ANY alterations. The sales rep (Mike Bond) helped me throughout the building process. I will buy shed/garage from them again should I need one, no doubt.
The true testament - I always thought our horses just liked stand outside in their runs when they lived in a near by barn before we built the shed, rain or shine. They stay inside the shed at night every day. It has withstand 75 mph wind storm no problem.