The Ontario Building Code | Substrate
9.30.6.1. Substrate
(1) Ceramic tile shall be set in a mortar bed or applied to a sound smooth base with a suitable adhesive.
(2) panel-type subfloor to which ceramic tile is to be applied with adhesive shall have its edges supported according to Article 9.23.14.3.
Section 9.31. Plumbing Facilities
9.31.1. Scope