Basement reinfocement

[sphelps]

Myka, I believe subfloors are required to be 1.25" thick for tile, typical subfloors are 3/4" so when tile is to be set builders lay an extra sheet of 1/2" on top. However depending on the builder extra 3/4" may be more available so they may double up on the 3/4" to make 1.5". I've seen this a few times before so I wouldn't doubt it, but even 1.25" is plenty.