My Shop is also 24X30 with 12' walls.
Pros:
Other than some leaks at first(I think the guy on the roof either had his impact gun set wrong, or, it was just worn out). They come back on twisted the screws in better, since then, no leaks)
No condensation issues at all
I have a woodstove for heat in the winter, aided by ceiling fans it keeps it decent in very cold weather.(Un-insulated)
With the concrete poured, 3 Mexican guys rolled in at 6:30 am, one break due to rain(15 mins or so) and they were packing up tools before 2:00pm. These buildings go up FAST
Conduit for electric is easy, as is plumbing for air.
Cons:
Un-insulated, it really sucks in hot weather, 95 outside, with two ceiling fans lifting hot air, an exhaust fan at eve pushing hot air out, three floor fans, and a small fan at the top of my walk through door, as said 95 outside, it'll be 105 and above inside, with all those fans running!!
heavy rain, no leaks but, loud as hell, forget listening to the radio or having a conversation.
I have roll up doors, supossed to be 10', but only measure when up to be like 9'6" To d it again, I'd get the track type.
When doors closed, drum gets smaller, so 4-5" gap to loose heat in the winter.
Don't pour concrete on a hot or windy day, my concrete cracked before I could do the relief cuts, Also fought leaves and spriggly things while trying to finish the concrete. (Several fossils in my concrete).
With a lift, and shelves or tool boxes and roll around things, only one bay is open for anything(as said, mine is a shop, not just to store in. My son Josh and Jason built a 24X36, and that extra 6' is a game changer for welding tables, jacks, tables and so on.
the 24' part, you can fit a crew cab short bed in, barely, a crew cab long bed, won't happen, at least with bay doors closed
As said, so far, I do not have insulation, but in figuring out costs and how much it'll take using anything other than spray foam, lot of waist since the wall studs are more than 48"
Lowes foam board is outrageous as far as cost, Market place 5 yrs ago was about $10 for 2" 4X8 sheets, now, most is $24 and up! Lowes is about double that. (My plan is eventually 2" on ceilings and 1" on the walls. (I'd really love to hear real experience in the foil faced bubble stuff, as seems Spray on is way out of my budget. )
Cell service sucks inside. As does radio reception I had to put up a external antenna.
If I were to do it again, knowing what I know now, it's be at least 30X 36 or larger
I would have it insulated as it was built or before I put ANYTHING inside. as now, with every wall covered with shelves, it's gonna be a pain in the ass to insulate
I would have gone with a lighter covered roof, as mine is dark gray, almost black, and sucks the heat in. a reflective material would have been much better.
Pests were mentioned. I've seen boring bees and termites mentioned, I've seen one mouse(Sketch, my dog took care of it) my only pest is spiders, wolf spiders love nesting in the ribs, some the size of tarantulas!!
I think with the insulation, a mini split would work great!
