As far as 3 ply to 5 ply all i can tell you is i have installed both and they were easy to work with and fit well.
5ply vs 3 ply engineered wood flooring.
The plywood is normally cross structure with 1 5mm thick of each ply in odd number 5 layer 7 layer or 9 layers and with the back layer same grain direction to the hardwood veneer lamellas.
It looks like all that material has been discontinued.
Ultimately we believe multi ply engineered flooring is the best option.
The three ply might be fine until it gets wet.
I looked in my area for the old 5 ply laminated wood and could find none readily.
A multi ply board is less likely to risk damage due to moisture and temperature fluctuations as compared to a 3 ply board.
When you are deciding between three ply and multi ply engineered wood flooring it s important to consider the conditions in your room as well as the moisture content of the sub floor.
It s not very moisture stable because of the thick sliced wood it is made of.
Multi ply engineered wood flooring is made up with 3 6mm hardwood veneer quality plywood structure.
It has the same wear layer a a reall hardwood solid floor.
Whether or not you have under floor heating.
It is a stronger flooring option will last longer is more resilient and resistant to warping and is overall more durable than 3 ply.
A three ply board is more likely to risk damage through moisture and temperature fluctuations than a multi ply board.
They have slight differences.