I've got a project that requires a 5" concrete slab with multiple, compound curves. Normally I would use 2x6's, cut a few kerfs and bend the forms where I need to. If I do that on this job, I'll be cutting kerfs for 2 days - not an option.
I've used 5/8" plywood in the past for gentle curves, but there are some tight ones on this project. The next thought is to use Masonite.
My question is what thickness of Masonite would you recommend??? I've seen it used before, but I've never had the need. Specifically, I've seen 1/2" Masonite used to pour a 4" slab, but this pour is going to be 5", and I have some skepticism about using 1/2" Masonite to form up for a 5" thick pour.