How necesary is it to use something like Ditra on a 30 year old basement floor?
I’m planning an ~550sqft tile floor in the family room of my Pretty Good House remodel project. The basement floor was poured sometime between 1980 and 2000, has one small crack and stays dry year round. How necessary is it to install some type of uncoupling layer between the tile and existing floor? The basement walls are insulated on the inside but I don’t know what, if anything, is underneath the slab.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part