What is the best type of carpet pad to use with EFH?
For TZ under the pad:
Lower the r-value the better. 3/8" to 1/2", 6-8 pound density.
For EV OVER the pad:
Higher the r-value the better. 3/8" to 1/2", 6-8 pound density.
See attached sheet with common r-values of flooring materials.