Fundo Ligno or Fundo Primo? We have about 34x46 (36x48 possibly) space, second floor. How to choose between these two?

Fundo Primo is a thicker base and requires a shower curb, unless you cut down into the substrate, which would require reinforcing inbetween the floor joists. The Fundo Ligno is a thiner base and is designed to mount on top of the substrate, and be level with a tile floor for a seemless look. Please give us a call, we are happy to talk with you about your project and see what the best option would be for you.