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Flooring InstallationColumnsTile & Stone FlooringCTEF Tile Tip

CTEF Tile Tip: Adapting to New Installation Techniques

By Scott Carothers
large-format tile
May 10, 2019

Not too long ago the Tile Council of North America (TCNA) Handbook considered an 8” x 8” tile to be large format. Then, unofficially, the 12” x 12” tiles took over that designation. Now a tile with at least one edge 15” in length or longer is considered to be a large format tile (LFT).

But how large can a tile increase in size until that designation changes?  For that answer, we need to consult the American National Standards Institute (ANSI) A137.3 American National Standard for Gauged Porcelain Tiles and Gauged Porcelain Tile Panels/Slabs. Under section 3.0, Definition of Terms, it states: “Tile Panel/Slab: A ceramic tile of size greater than or equal to 1 m² (11 ft²). A product less than 1 m² (11 ft²) shall be regarded simply as a tile.” The actual size in English measurements for 1 m² would be 39-3/8” x 39-3/8”.

This allows for a wide range of tile sizes in between. The tile shown in the attached photo is approximately 9” x 82” which is over five square feet! This would be comparable to installing five 12” x 12” tiles at one time. However, this is less than half of the ANSI tile definition of “simply a tile” at 11 square feet.  The installation technique needed to install this large and long woodgrain plank tile is incredibly different. It would be almost impossible for one installer to set a tile this long without help.

A well trained and experienced tile installer should be able to single-handedly set tiles ranging from 12” x 24” up to 24” x 48” on a floor installation. But the popularity of installing those same tiles on walls is gaining momentum, which brings its own challenges. Things like getting each tile in a flat plane with those around it may require the use of a lippage control device to be within the ANSI allowance of 1/32”, or achieving the required 80% mortar coverage in dry areas and 95% mortar coverage in wet areas can be difficult.

But what happens when the tiles are even larger than those described in the last paragraph? Enter the new really long tiles which will require everyone in the tile installation business to rethink the methodology used to install this longer floor tile. The use of a good quality pair of suction cups and maybe two installers is needed to accurately and efficiently install one five square foot plank. This additional help could increase the bid price.

To check out more CTEF Tile Tips, click here!

This is not to say that you as the installer, should be afraid, but rather, well informed and equipped to handle these new entries into the market and get paid a fair wage to install them. Qualified labor may be slightly more expensive, but it pays in the long run.

As tiles continue to increase in size, it’s time to change installation techniques.

KEYWORDS: education and training installing tile Large-Format Tiles

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Scott carothers 2025

Scott Carothers is the Academic Director of the Ceramic Tile Education Foundation (CTEF) headquartered in Mt. Juliet, Tennessee (Nashville area). In 2007, he was hired and tasked with creating the Certified Tile Installer (CTI) program and in 2012, he was part of the team that created the Advanced Certifications for Tile Installers (ACT) program. 

For eighteen years, he has been providing training and education to others in the tile industry. Carothers has been involved in the ceramic tile industry for over 44 years and was the owner of a successful retail store and installation firm prior to coming to CTEF. 

Carothers served as President and Chairman of the Board of the National Tile Contractors Association (NTCA), Chairman of the NTCA Technical Committee, named the NTCA Tile Person of the Year in 2005 and received the NTCA Ring of Honor in 2013. He is a voting member of the American National Standards Institute (ANSI), the Tile Council of North America (TCNA) Handbook, and NTCA Technical Committees. 

Scott has authored over 185 articles in tile industry print magazines including Floor Covering Installer, Tile, TileLetter, and eMagazine/Newsletter publications such as Floor Trends & Installation and TIleLetter along with covering numerous topics on the CTEF Blog, thereby sharing his knowledge and installation experience with his readers. Additionally, he recently retired from being a presenter and trainer for the NTCA Workshop and Regional Training programs and the NTCA Technical Hotline.

He may be contacted at scott@tilecareer.com or 864-222-2131.

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