HERE ARE SOME GOOD INSTALL GUIDES I do not cut corners when installing the FRP. I use a good coverage of adhesive and press it on firmly and use plywood pads with bracing to hold the FRP to wall until dry. I like a solid feel when pressing the FRP wall and not puffy voids.
I have had good success with mine. I used a plywood backing. What you have on your walls will work fine.
I have had good success with my installs. I use A/C plywood backing. What you have on your walls will work fine. I use a very small bead of clear tub chalking in the corner channels of the trim pieces before slipping them over the edges of the FRP. Makes for a perfect corner seal. I use painter's tape along both sides of all seams when calking wall to tub basin, etc. Remove tape carefully before chalk dries and smooth chalk with wet finger. I dislike a messy chalking job.
I have done jobs where I ran the FRP horizonal on the bottom half of wall and finish the top half with another material to compliment it. Different strokes for different folks.
