Expert Answers in Standards

ANSWER - What is called Shade Variation is normal in the tile industry, but what is considered reasonable variation depends... In the industry we have what is called in ANSI A137.1 Aesthetic Classes, which is…

ANSWER -  In terms of manufacturing of ceramic tiles, which includes porcelain tiles that are a type of ceramic tile, there are quality control standards in ANSI A137.1  that allow a small percentage of tiles…

ANSWER - TCNA Handbook does say that movement joints within the tile assembly should be at least ¼” wide, but the current version of the handbook does indicate that if your movement joints are installed…

ANSWER - The standards for a porcelain tile is that the substrate can not have more deflection than L/360.  For natural stone over a wood subfloor it is L/720.  L stands for…

ANSWER - As long as the linoleum is well attached to its substrate, and the substrate is structurally sound, then you can install tile over it.  The new tile installation will only be as good…

ANSWER - It is hard to see exactly what they did.  Your message says “photo thin set 1/16” is on the floor, 1.5” to 2.5” of mortar mix with less than 90% coverage, and thin-set 1/16”…

ANSWER - ANSI A108.02 are the standards for tile installer workmanship.  Some of the standards are quantitative, but many are qualitative and subjective. The only reference to alignment is that the tile should be installed…

ANSWER - When there is a problem it normally is not due to one deficiency, but due to multiple compounding deficiencies. You state that the peel and stick moisture barrier was properly installed.  If if…

ANSWER - First of all, per industry standards hollow sounding tiles are not considered a defect per-se.  Although a hollow sounding tile, or a portion of a tile sounding hollow, can possibly be a symptom…

ANSWER - Tile having a hollow sound is not considered a defect in itself.  It can be a symptom of a defect.  There are many reasons why a tile can sound hollow.  It could be…