Home Improvement Questions? Ask a Handyman for Answers
Thin set is not intended to be a leveling cpmpound although many people use it as such, myself included. It can be used to over 1" in thickness if applied in layers no thicker than 1/4" at a time, and allowed to completly dry between applications. In order to do this you need to add acrylic to the mix instead of water. Each layer will need to dry at least 24 hours.
Mind you now I do not recommend that you use thinset for anything over 3/8". There are self leveling mixes that are better suited to this type of application.
If this has answered your question click the green ACCEPT button.
If you have other concerns in this matter please reply here in this thread.
After you click ACCEPT. Please leave feedback.
Best regards; The Home Smithy