A coating applied after the floor is made is limited to dry areas
ANSI A326.3, quoted on the Tile Council questions page, treats a coating applied after firing of a ceramic product, after fabrication of a non-ceramic product, or after the floor is installed on site as its own case. Those coated floors shall be used only in areas that can be kept dry, unless the coating's maker declares otherwise.
If someone still wants a test
When data are required after the coating is on, the quoted text says to use the test method the coating maker specifies. If that maker specifies none, use the dry procedure in A326.3.
The coating maker is the one who widens the use
The exception is a declaration from the coating maker, not a guess from the floor's original class before the coating went on.
Source
Fetched 2026-10-11 from Tile Council DCOF questions. The sentences above follow that page. They are not a contractor promise.
Related notes
- Tile notes index
- Some A326.3 classes are declared by the maker, not by one lab cutoff
- The five A326.3 use classes do not cover ramps
- Backsplash photos
Send photos if you want another person to look at the area. This note does not set a response time.