This is my inflated scale model. The dome is 47" across (1'/in).

The part I haven't figured out, and part of the reason for the scale model, is the brow, which will be added once the dome construction is finished. The back brow has to handle water runoff and retain the earthshelter. Nobody's gonna see it, so it's just a functional item. The front brow has a lot bigger job. It has to protrude far enough to shelter the upper windows from summer sun, plus it has to keep the earthshelter in place, plus it has to handle water runoff for the dome AND the brow (two separate functions), PLUS it has to compliment the structure. Some of how I'm going to handle it I've got, but need a model to work out the rest.

Telling people about it always helps. I think I know how I'm going to get the right shape without a lot of trial and error work. Once I get the scale model hardened (haven't figured that out yet - gotta do some testing on some scrap material), I'll cut off the ends of the dome and add my endwalls. I'll cut a piece of stretch material, sew cording in one side, which will be stapled to the top of the endwalls, helping to hold the dome to the endwalls, and a sleeve in the other side which I'll run a piece of heavy gauge wire through and use the wire to expand and contract the shape the flexible brow until I have the configuration I like. If I need to I can use a piece of wide elastic between the dome and the edge of the brow to provide a concave the full length of the brow.

Once I get the endwalls in and the brows on and looking like I want, I'll paint in windows to get the look I want. I can cut out pieces of yellow paper and tape them on until I get just the look I want, complimenting the shape of the house and brow.