If you need thickness you can glue layers together as it should all be encased with a coating of Poor Man's Fiberglass (PMF). It is a very different method of construction and definitely more messy, I don't think I own a shirt without some glue or paint on it. I always recommend you start with small test pieces to see what works for you but my first project I committed to was a vardo type 80" x 80" x 6' camper. I had my doubts but because it was a big investment for me of time and money I had to learn how to make it work. Fortunately there are lot of good resources out there with the internet. Not everything turned out the way I expected or wanted but it worked well and has been super easy to repair and change. There is a learning curve but the results are pretty amazing and have been well worth it for me. Unlike many manufactured RVs these are light weight and won't fall apart going down a dirt road and costs are a 20% of any other alternative.