1/4" cement board with thinset and screwed down
I can't thinset to HDF...you can only glue to HDF.
1/4" cement board with thinset and screwed down. I don't why so many want to skip thinset between backer board and substrate. I'd probably prime the HDF.
It's nearly pointless on a counter top because no one will be walking on it.
Thin-set fills any gaps that could cause movement when someone walks on the floor, I don't think anyone will be walking on the counter top.
I'd use the plywood and paint with a coating of liquid water proofing. That you don't risk water infiltrating the substrate around the sink.
If you use two layers of the appropriate plywood, ran perpendicular to one another, glued and screwed - cbu is not necessary. A typical counter top is a small enough area that using good plywood won't add that much to the cost anyway, and I hate cbu. Membrane it with noble or a liquid and it's bullet proof. You guys over think ****e sometimes lol.
If you use two layers of the appropriate plywood, ran perpendicular to one another, glued and screwed - cbu is not necessary. A typical counter top is a small enough area that using good plywood won't add that much to the cost anyway, and I hate cbu. Membrane it with noble or a liquid and it's bullet proof. You guys over think ****e sometimes lol.
Why use two layers of ply when one backer board would suffice? You don't have to use cement, he could use fiber too.
Why use two layers of ply when one backer board would suffice? You don't have to use cement, he could use fiber too.