Plastic

An architect in San Jose, California designed and built a dome house made by first laying down a circular concrete footing/ring, then installing a plastic fiber membrane (Tyvex) like a drumhead, then spreading a fibrous Portland cement mix uniformly on this like frosting on a cake, and finally inflating this from below. The resulting monolithic dome can be then spray insulated on the inside, further stiffening the shell.

Offered by Phil.

Take a look at the product Radomes if you want to see a hi-tech (expensive!) solution. Looks like these guys have built some domes before!

The first modern air structure was a radome developed at Cornell Aeronautical Laboratory in the early 1950's. It was specially designed to meet the need for a thin wall, nonmetallic enclosure to protect large radar systems from high winds and severe weather

Offered by Jon.