Uncle Wally,
Hold everything there will ha. An old kitchen with old tongue and groove wood means 4-6" wide planks to me, and if I'm right, you can not install your Fiberock direct to that, or any other CBU for that matter. You need to first install plywood or OSB.
If you'd like some advice to make sure you're heading down the right path, let's start with you telling us how the framing is built. Size of the joists, spacing, unsupported span. see if you can figure out the species and grade of the joists and tell us if they're in good condition.
Yes, underlayment grade comes in both 4x4 and 3x5 in ¼ & ⅜ thickness.
Jaz
Hold everything there will ha. An old kitchen with old tongue and groove wood means 4-6" wide planks to me, and if I'm right, you can not install your Fiberock direct to that, or any other CBU for that matter. You need to first install plywood or OSB.
If you'd like some advice to make sure you're heading down the right path, let's start with you telling us how the framing is built. Size of the joists, spacing, unsupported span. see if you can figure out the species and grade of the joists and tell us if they're in good condition.
Yes, underlayment grade comes in both 4x4 and 3x5 in ¼ & ⅜ thickness.
Jaz
