Cement board over existing drywall dilemma

up vote 0 down vote favorite. Can you use cement board OVER an existing drywall for a new tile shower installation in a bathroom renovation? tile … Google Alert – drywall Call IMS at 504.327.5840 ext. 2 to get a free quote on your next Multifamily Drywall Project. Rob Hubbard (robertghubbard.com) Read more…