Hey all,
I have been trying to plan my construction plans and I am running into a bit of a roadblock. I am struggling with finding materials that align with correct thickness. Specifically I am trying to align plywood with foam board.
For my floor I am planning a layer from top to bottom:
1/2" Hickory engineered hardwood
5mm Underlayment
1x2 furring strips(common .75) with .75 Kingspan foam board (common .75)
7/32 plywood
I think this will work successfully for my floor. I am struggling with the walls. I would prefer to carve my wall interior structure from plywood vice assembling it with sticks and a Kregg jig. The problem I am running into is finding a combination of plywood and foam that are the same thickness. The best combination I have found so far is 19/32 plywood. The 19/32 sheeting has a thickness of .59. If I use green Kingspan foam the panel has a thickness of common .56.
If I look at thicker plywood the best I can find is 23/32 sheeting with a thickness of .72. This appears to be far enough away from the 3/4 foam board thickness that the foam board will not work in combination with that plywood. Anything I am finding in 3/4 ply thickness is either closer to .62, a more expensive hardwood, or pressure treated. None of these are good selections for what I am trying to do.
Am I just failing in my search for a good 3/4 plywood that aligns with a 3/4 foam panel or is this a strange thickness combination?