what is the difference between ditra and ditra xl?
What's the difference between Ditra and Ditra XL? Ditra is 1/8" thick, and can be installed on single layer plywood or OSB subfloors that are over joists spaced up to 19.2" on center. ... Ditra XL is 5/16" thick, and can be installed on single layer plywood or OSB subfloors that are over joists spaced up to 24" on center.