I've done the many screws through XPS and plywood and it was not too bad. Worked with one other, one person pre-drilling spots and the other following with tapcons. Floor felt warm and solid after.
You will get (slightly) better but essentially the same R-value (3+) with 1/2" XPS, dimple roll and plywood than you get from the Dricore, and I have to think installing large sheets will create a better floor than a bunch of 2x2 squares. Fair point about the screws reducing R value, not sure how significant that would be.
I have never installed Dricore but it looks easy, considering the same options for my own basment finishing.
|