Kel Rock wrote:Thanks for posting your question. I too am looking into QH to build a home. I’ve been trying to figure out a way to insulate it without taking away from the simple and elegant arch. Most people use spray foam or batting and cover it with tons of lumber and Sheetrock. I’m a fan of the industrial look and wish insulation wasn’t needed so I could enjoy the beauty of the steel. Since that’s clearly not practical, let me know if you find a solution that enhances the arch instead of hiding it.
Good luck with your build and let us know how it goes!
Hi Kel
I'm not sure how big you are planning to go with your QH. Our is 30' wide by 100' long and 16' tall standing on a 4' stem wall, making it actually 20' tall. They are not complicated to erect and there are several methods shown on YouTube. The team putting ours up consisted of 4 amateurs, aged 60 to 72 only one of whom had actual construction experience. We made one big mistake, which was annoyingly time consuming to correct - which was ignoring the written and emphasized instructions to erect the building with the bolts only hand tight during the initial build and then go back and tighten the bolts after. If you don't do that, the building will twist, and it will twist more the further you go, until bolting it together and bolting it down becomes impossible. Our guy with the construction expertise wanted to put the building up in one pass because of the heavy equipment we had to rent and because 20' up on a fairly slippery surface is no fun. With the size of our building, the cherry picker was useless coming at the building from the side - we could only use it from the front building face. The scissorlift was used to lift the partly build arches - which we partly constructed on the ground outside the building foot print, then lifted and rolled forward with the scissor lift and bolted on the bottom of each leg just before lifting in place. It was too awkward to fully construct outside the footprint due to the weight. The final step of tightening the bolts meant putting a man up top with less safety arrangements than any of us were comfortable with. It worked in the end, but think through how you will approach those issues before you order your building. Also, I would NEVER, NEVER, EVER put up one of these buildings without investing in the baseplates. The vendors will tell you those are optional - No, they are not optional in my view. They will add $1000s to the price, but are so worth it!
A note about the scissorlift and cherry picker. Their safety mechanisms are VERY stubborn. If the machine is not on flat, stable ground, it may refuse to lift or to lift to full height, and will insist on a perfectly flat surface before they will roll forward. The cherrypicker was a bit more forgiving than the scissor lift. You'll note in the pictures, we ended up building a gravel platform outside the foundation footprint in order to satisfy the machines. I know, that sounds like I'm anthropomorphizing, but those machines certainly gave the strong impression of having minds of their own and a high degree of stubborness. When people say the first 10 arches can be tricky and liken it to working with a slinky - that's about right. Bracing is your friend. Working in a wind higher than 5 MPH is not feasible. Until bolted down, the arches are huge, heavy kites.
As far as insulating - we haven't as ours is being used as a machine shed, but in some future, we may change its use. I will probably opt for the system that uses insulation that looks like thin mattresses, as I wouldn't want to permanently cover the joins between the metal arches and not be able to look at what is going on if there is water ingress. That system is really cool - it uses the excess threads from the bolts that connect the arches, to screw on the hardware that holds the mattresses.
You've indicated you might want to build 2 QH, one inside the other and blow insulation in between. I guess that's possible, but will add significantly to the cost of the build. You won't be able to 'hang' anything from the superstructure - unless your vendor, architect and county planner are a lot more innovative than mine. The most that my vendor would supply to be bolted to the superstructure is the end structures, which are partly self supporting. Logistically, you would probably have to build both skins at the same time, building out from one end. Your architect would need to calculate the exact shape of the inner skin so that it would run more or less parallel to the outer skin in all dimensions. The two skins would need to be separated by enough space for someone to squeeze between for tightening bolts at the end. That probably leaves quite a gap for blow-in insulation - and I'm not sure how you'd keep the insulation spaced out and not settling / compacting down into the 'legs' of your paired structure. You'd want to convince your county planner that the inner skin is non-structural and only the outer skin needs to meet snow load requirements. You might also get away with much lighter steel for the inner skin.
If you mooseage me your email address, I'll put you in touch with our team leader (the one with construction experience) and he might have some innovative ideas to help with your choices.