b'ASK THE EXPERTSAsk the Experts Q&As are culled from member inquiries to NTCAs Technical Support staff. To become a member and make use of personal, targeted answers from Technical Support staff to your installation questions, contact Jim Olson at jim@tile-assn.com.QUESTION ANSWERI have a customer with an exte- I am glad you have asked ques-riorbalconythatistiledonthetions about this installation before fl and walls. The space belowproceeding.Anexteriorbalconyoor thebalconyisconditionedspaceover occupied space is among the (front hall). The waterproofi ng hasmost critical types of installations failedandhesgettingwaterinatilecontractorcanface.There the room below when theres rain.is very much information to con-Idontknowwhattheexistingsider, more than can be addressed waterproofi ngsystemis.Hehashere, so I will begin by listing the askedmetoremoveandreplaceapplicable reference material and everything, but Im not sure whatasking you to take a look through kindofsubstrate/waterproofi ngtothe information listed below.use. The rep of the company whose productsIusuallyusetellsmeTCNA Handbookthat theyre not approved for exte- (2019 Edition)rior use. The balcony has walls on WetAreas four sides, so I need to be able toG u i d e l i n e s incorporate drains to let the water(Page 41)out. Is there a product that you can Environmental recommend for this application? ExposureClas-sifi cations (Page 44). See thedefi nitionforRes6 (ResidentialExterior) and the charts for Floors and Wallsonpages46 and 47.MethodsforExterior Roof/DeckandBalcony/Deck Floors: F103; F103B; F104;F105(Pages60- 67).MethodsforExterior Walls:W201(Page186); W202E (Page 188); W244E (Page 190)20 TileLetter | July 2020'