Crossville Inc

Design Resources

DCOF Ratings

Choosing the right Crossville tile for commercial applications

Crossville adheres to DCOF AcuTest™, the new standard for measuring coefficients of friction to better support tile selection in commercial applications. We are among the first in the industry to implement this new standard for all of our product collections.

It’s important to note that not all products with a DCOF value over the recommended 0.42 standard are suitable for all applications. Type of use, expected traffic and wear, contaminants, maintenance and manufacturer guidelines must also be considered when specifying a product.

For more information on DCOF, visit the TCNA website at

DCOF Chart

Ratings for all Crossville products are available in our comprehensive DCOF chart.

Series Finish DCOF Range
Test Method ANSI A137.1 AcuTest
Porcelain Stone®
Argent UPS 0.50 – 0.60
HON 0.42 – 0.52
Bluestone UPS 0.50 – 0.60
HON 0.42 – 0.52
Buenos Aires Mood PO 0.31 – 0.41
UP 0.50 – 0.60
TX 0.50 – 0.60
Crossville Mosaics -AV90, AV91, and AV92 UPS 0.50 – 0.60
Crossville Mosaics – all other colors UPS 0.50 – 0.60
Crossville Mosaics – all other colors CTS 0.50 – 0.60*
Color Blox UPS 0.42 – 0.52
Color Blox Mosaics UPS 0.50 – 0.60
Cotto Americana UPS 0.58 – 0.68
Cross-Colors® &
Cross-Colors LP®
PO 0.31 – 0.41
UPS 0.50 – 0.60
CS 0.50 – 0.60
CD 0.50 – 0.60*
CTS 0.50 – 0.60
EcoCycle Americana UPS 0.42 – 0.52
Empire PO 0.22 – 0.32
UP 0.42 – 0.52
Garden TX 0.50 – 0.60
Limestone – AV231-AV233 UPS 0.50 – 0.60
Limestone – AV234-AV235 UPS 0.42 – 0.52
Main Street UPS 0.66 – 0.76
Manoir UPS 0.42 – 0.52
NOW UP 0.42 – 0.52
Reclamation UPS 0.50 – 0.60
Retro Active PO 0.31 – 0.41
UPS 0.50 – 0.60
Shades by Crossville HON 0.42 – 0.52
UPS 0.50 – 0.60
SpeakEasy UPS 0.50 – 0.60
Strong UP 0.58 – 0.68
Structure UPS 0.50 – 0.60
Virtue UPS 0.42 – 0.52
SAT 0.31 – 0.41
Vista Americana UPS 0.50 – 0.60
Wood Impressions UPS 0.42 – 0.52
*The increased real world traction of these types of surfaces cannot be fully realized by any current COF testing methologies due to their exaggerated facial structures.
**Due to the heavily textured surface, DCOF value is not able to be measured by testing device.

How DCOF AcuTest Works

Friction is the force that resists the sliding motion of one surface against another, such as the motion of a foot against a tile floor. Contaminants, such as liquids, oil, dirt and debris, can alter the innate friction of a surface.

There are two types of friction: static (SCOF) and dynamic (DCOF). SCOF is the ratio of forces necessary to start two surfaces sliding. This is what the former ASTM C1028 static test measured. DCOF is the ratio of forces necessary to keep two surfaces sliding. The new DCOF AcuTest measures this ratio, which many manufacturers now believe better relates to the friction coefficient at work when a person slips on tile flooring.

The new 0.42 DCOF wet rating replaces the old 0.60 SCOF wet rating as the benchmark for friction in flooring applications.
The new, more stringent DCOF AcuTest uses a portable robot (the BOT 3000), an SBR rubber sensor and slightly soapy water (0.05% sodium lauryl sulfate solution) to measure dynamic friction. It’s a repeatable, reproducible method for measuring DCOF and, according to the TCNA, it is a major improvement over the old test method. It also offers a standardized minimum threshold, which is new to the industry.

5 Things You Should Know about DCOF

  1. The DCOF AcuTest measures DCOF, not SCOF
  2. DCOF AcuTest uses slightly soapy water instead of clean water for testing
  3. 0.42 is the new standard as measured by the DCOF AcuTest for interior flooring walked upon when wet
  4. The DCOF AcuTest is included in the latest version of ANSI A137.1 Specifications for Ceramic Tile
  5. All Crossville flooring products have been tested using this method