Today was a looooong day. Things didn't go quite as smoothly as planned, but we made it through alright I think :D
Looking good !!!!!!
Hi! I'm thinking of building my tiny house with SIPs, too, but am still working out some of the trickier details like wheel wells. I'm wondering--how did you do the curved sill plate over the wheel well? And why did you choose to curve it rather than have 3 straight sides?
Sorry it's taken me so long to answer. I've actually answered twice and then accidentally deleted the comment before posting (maddening really).
We used cut out pieces of wood to curve over the wheel wells. We went curved to avoid any weird shaped empty spaces. We know a guy in town though that used composite 2x4s. It worked very very well because you can use a heat gun to form it perfectly over the curve using a bunch of pressure. (We had trouble finding this stuff at a not really expensive price, but try decking material if you have the funds). Then use metal tapping screws to attach to the well (just make sure the screws aren't too long that they may hit the wheel on a big bump!). There are trailers that have angular wheel wells though, probably would have been easier to deal with.
Anyways, hit us up anytime if you have questions or anything! There are certainly things we would change if we could go back (like investing in using a SIP panel as the floor!). We would love to see your plans and you progress! Good luck!