Teardrops n Tiny Travel Trailers

I put form-core insulation between the ribs, cut out the top skin and glued the sandwich together on a dead-flat worktop that I built. I used 60 lb. buckets of driveway tar to weight the whole mess down. When the glue dries, you've got a flat panel that will never twist or warp. This photo shows some of the insulation in place and shows how I glued the ribs to the bottom skin before putting the whole thing together.