DCOF Rating Explained: How to Read Slip-Resistance Information Before Buying Tile

You find the perfect tile. The color works. The size fits the layout. The finish looks exactly right.

Then you scroll through the technical specifications and see something like:

DCOF Wet: ≥ 0.42

What does that actually tell you?

Does 0.42 mean the tile is non-slip? Is 0.60 automatically safer? Can a tile with a 0.42 DCOF go inside a shower? What about a patio, restaurant kitchen, pool deck, or bathroom used by children or older adults?

These are important questions because DCOF is one of the most misunderstood tile specifications. Buyers often see the number and treat it like a simple safety score. In reality, DCOF is useful only when you understand the test conditions and the type of space where the tile will be installed.

The current U.S. standard, ANSI A326.3, goes beyond a single number. It includes product-use classifications such as Interior Dry, Interior Wet, Interior Wet Plus, Exterior Wet, and Oils/Greases to help manufacturers and specifiers communicate where hard-surface flooring may be appropriate. The Tile Council of North America also makes an important distinction: DCOF is useful for comparing surfaces, but it is not the same thing as overall slip resistance and cannot predict whether a person will or will not slip.

That distinction matters when you are buying floor tile online, because appearance alone cannot confirm whether a tile suits the intended application.

This guide explains how to read DCOF information before ordering so you can choose tile based on the conditions it will actually face, not just one decimal number on a specification sheet.

What Does DCOF Mean on Tile?

DCOF stands for Dynamic Coefficient of Friction.

In simple terms, it is a standardized measurement of the friction between a moving test surface and the flooring being evaluated.

The word dynamic is important. It refers to friction while movement is already occurring. This is different from older static coefficient-of-friction measurements that focused on the force required to begin movement.

Under ANSI A326.3, DCOF testing can be performed in controlled wet or dry conditions and can be used both in laboratories and on installed hard-surface flooring. The standard originally grew out of ceramic-tile testing but now applies more broadly to hard-surface flooring materials.

For a shopper, the easiest way to understand it is this:

DCOF is one piece of information that helps describe how a flooring surface behaves under specific test conditions. It is not a universal "slip-proof" score.

This distinction prevents a lot of bad tile decisions.

Does a Higher DCOF Number Mean More Slip Resistance?

When two surfaces have been tested using the same method and conditions, a higher measured coefficient generally represents more friction during that test.

But this does not mean you should simply search for the biggest DCOF number available and assume you have found the safest tile.

Real floors are more complicated than laboratory comparisons.

The TCNA notes that slip potential can be affected by factors including:

• Water.
• Dirt.
• Soap.
• Oil or grease.
• Footwear.
• Wear on the shoe sole.
• Floor slope.
• Surface structure.
• Drainage.
• Maintenance.
• Traffic conditions.
• Changes in the flooring surface over time.

That is why ANSI A326.3 explicitly treats DCOF as only one part of product selection.

A tile with an impressive laboratory number can still be a poor choice if it is installed in an environment very different from the conditions for which the manufacturer recommends it.

What Does DCOF 0.42 Actually Mean?

This is probably the most important part of the guide.

You'll frequently see 0.42 mentioned when shopping for bathroom floor tile, kitchen tile, commercial flooring, or other surfaces that may become wet.

Under the current ANSI A326.3 product-use system, the Interior Wet (IW) classification uses:

Wet DCOF ≥ 0.42 under the specified test method, or a manufacturer-declared classification.

The standard also identifies Interior Dry (ID) flooring using a dry DCOF of at least 0.42.

For shoppers, this means a wet DCOF of 0.42 is relevant when considering certain level interior spaces expected to become wet with water.

It does not mean:

• The floor can never be slippery.
• The tile is safe in every wet environment.
• It automatically works for a shower floor.
• It automatically works outside.
• It automatically works around pools.
• It is suitable around cooking oils or grease.
• It satisfies every local code or project specification.
• A tile measuring 0.50 is automatically the correct choice for every area.

That is the mistake we want buyers to avoid.

DCOF 0.42 Is Not "42% Slip Resistant"

Another common misunderstanding is reading 0.42 as a percentage.

It is not.

A DCOF of 0.42 does not mean that a tile provides "42 percent slip resistance." The coefficient is a ratio produced by a defined friction test.

There is no simple percentage conversion that tells you the probability of slipping.

So if you see marketing language suggesting that a particular DCOF number makes a surface a certain percentage "safer," treat that claim cautiously.

Why ANSI A326.3 Now Uses Product-Use Classifications

Older explanations of DCOF often stop after saying:

"Wet DCOF of 0.42 or higher = suitable for wet areas."

That shortcut is too broad.

The current ANSI A326.3 framework includes five product-use reference categories, which gives buyers much more useful context.

Classification	Code	How It Is Established
Interior, Dry	ID	Dry DCOF ≥ 0.42
Interior, Wet	IW	Wet DCOF ≥ 0.42 or manufacturer-declared
Interior, Wet Plus	IW+	Manufacturer-declared
Exterior, Wet	EW	Manufacturer-declared
Oils/Greases	O/G	Manufacturer-declared

The important development here is the word manufacturer-declared.

For several demanding conditions, ANSI does not simply tell you to look for a bigger universal number. Instead, the manufacturer identifies products it considers appropriate for that use based on testing, product characteristics, quality-control criteria, experience with similar surfaces, and other relevant information.

That means today's educated tile buyer should look for both the DCOF information and the intended-use declaration.

What Does "Manufacturer-Declared" Mean?

A manufacturer-declared use classification does not mean somebody looked at the tile and decided it "felt grippy."

Under ANSI A326.3, manufacturers may base these declarations on factors such as manufacturing parameters, quality-control criteria, their experience with similar surfaces, applicable DCOF limits or other test methods, internal standards, abrasive particles, and the physical structure of the surface.

This is especially important for products where a conventional DCOF test may not tell the entire story.

For example, heavily structured or three-dimensional surfaces can interact with testing equipment differently from smooth surfaces. Mosaics also present different surface geometry because a finished mosaic floor includes repeated joints between individual pieces.

The standard therefore recognizes that one numerical DCOF test cannot describe every hard-surface flooring condition equally well.

For the customer, the buying question becomes:

"Has the manufacturer approved or classified this exact product for the environment where I want to install it?"

That is far more useful than asking only, "What is the DCOF?"

How to Read DCOF Information on a Tile Product Page

Imagine you are comparing porcelain floor tiles and find this information:

Specification	Example
Finish	Matte
Wet DCOF	≥ 0.42
Recommended application	Interior floor
Product-use classification	Interior Wet
Material	Porcelain
Floor use	Yes

A customer might see "≥ 0.42" and stop there.

Instead, read the specification in this order.

Step 1: Confirm That the Exact Tile Is Floor-Rated

Before worrying about DCOF, confirm that the manufacturer allows the tile to be installed on floors.

Some tiles are produced only for:

• Walls.
• Backsplashes.
• Decorative accents.
• Shower walls.
• Fireplace surrounds.

A DCOF number should never be used to override the manufacturer's basic application limitations.

Step 2: Check Whether the DCOF Is Wet or Dry

A number without test conditions is incomplete information.

If you are choosing tile for an area where water can reasonably reach the walking surface, the wet performance information is more relevant than a dry measurement.

This is especially important for:

• Bathroom floors.
• Laundry rooms.
• Mudrooms.
• Interior entrances.
• Kitchens.
• Commercial restrooms.
• Other level interior areas where water may occasionally reach the floor.

Step 3: Check the Test Standard

Look for a reference to ANSI A326.3 when evaluating contemporary U.S. DCOF information.

Do not assume that every friction number found online came from the same test.

Numbers generated by different test methods are not automatically interchangeable.

Step 4: Look for the Intended-Use Classification

If available, look for:

• ID.
• IW.
• IW+.
• EW.
• O/G.

The classification may tell you more about the manufacturer's intended use than the raw DCOF number by itself.

Step 5: Check the Exact Finish

This is one of the easiest details to miss.

A tile collection may be available in:

• Polished.
• Matte.
• Honed.
• Textured.
• Grip.
• Structured.
• Natural.
• Semi-polished finishes.

Do not assume every finish in the same collection has identical friction characteristics.

If you are viewing a polished tile but the technical sheet lists several collection finishes together, verify that the published rating applies to your exact finish, size, and product.

Step 6: Match the Specification to the Actual Room

Now ask what will realistically be on the floor.

Is it:

• Usually dry?
• Occasionally wet with clean water?
• Frequently wet?
• Soapy?
• Exposed to rain?
• Exposed to pool water?
• Contaminated with cooking grease?
• Sloped?
• Walked on barefoot?
• Used by large numbers of people?

The answer determines how much confidence you should place in a simple DCOF value.

What DCOF Should You Look for in a Bathroom?

A bathroom is not one uniform environment.

This is where many shoppers make mistakes.

Main Bathroom Floor

A level bathroom floor outside the shower may occasionally receive water from wet feet, a sink, or a bathtub.

For that situation, an Interior Wet classification or the appropriate manufacturer-approved wet-use specification is highly relevant.

A wet DCOF of at least 0.42 is associated with the IW category under ANSI A326.3 when measured according to the standard, unless the manufacturer declares the product appropriately through the permitted classification process.

That makes it a useful starting point when browsing bathroom floor tile.

But it still needs to be evaluated alongside finish, maintenance, drainage, users, and manufacturer instructions.

You can compare bathroom floor tiles by material, finish and size, but always verify the specifications of the exact product before ordering.

Shower Floor

A shower is more demanding.

Water is present repeatedly. Soap, shampoo, conditioner, body oils, and cleaning-product residue may reach the floor. The surface must also slope toward a drain.

This is why a 0.42 number alone should not be used as your entire shower-floor decision.

The safer buying process is to verify that the manufacturer specifically recommends or declares the exact product suitable for the intended shower-floor application.

Small-format mosaic shower floor tiles are common on traditional shower pans because they conform more easily to slope and create numerous grout joints across the walking surface. But even here, tile size should not replace product suitability.

Choose the complete system, not one specification.

Does DCOF Apply to Sloped Floors and Ramps?

This is another reason the 0.42 shortcut can mislead buyers.

TCNA's current ANSI A326.3 FAQ explicitly states that ramps and inclined surfaces are not addressed by the five product-use categories.

If the surface is meaningfully sloped, do not assume an Interior Wet classification designed around level flooring answers every safety question.

Instead, evaluate:

• Project specifications.
• Local building requirements.
• Manufacturer recommendations.
• The degree of slope.
• Expected footwear.
• Environmental contaminants.
• Drainage.
• Maintenance procedures.

Commercial or accessibility-sensitive projects may require professional specification rather than a homeowner interpreting a product number independently.

What DCOF Should You Look for Outdoors?

This is where the newer classification system becomes especially useful.

Outdoor flooring can encounter:

• Rain.
• Dirt.
• Leaves.
• Dust.
• Pool water.
• Snow.
• Ice.
• Mud.
• Sunscreen or other contaminants.

That is very different from an interior bathroom where occasional clean water reaches a level floor.

For this reason, ANSI A326.3 includes an Exterior Wet (EW) category that is manufacturer-declared rather than relying on the Interior Wet 0.42 rule alone.

When shopping for patios, walkways, courtyards, or pool-adjacent surfaces, look beyond the DCOF field and verify that the manufacturer rates the material for the proposed exterior use.

You should also check unrelated outdoor requirements such as:

• Freeze-thaw suitability where applicable.
• Water absorption.
• Thickness.
• Installation method.
• Drainage.
• Substrate.
• Climate exposure.

A tile can provide good traction yet still be the wrong tile for outdoor freeze-thaw conditions.

That is why Floors Center's outdoor tile and porcelain paver collections should be filtered first by application and then by design.

What About Commercial Kitchens and Greasy Floors?

Water is not the only contaminant that matters.

A restaurant kitchen can expose the floor to:

• Cooking oils.
• Animal fats.
• Grease.
• Food residue.
• Detergents.
• Water.
• Frequent cleaning.

ANSI A326.3 therefore includes a separate Oils/Greases (O/G) manufacturer-declared category.

This is an important reminder for both homeowners and commercial buyers:

A tile that performs adequately with water should not automatically be assumed to perform the same way when oil or grease is present.

A residential kitchen where occasional cooking oil is cleaned immediately is also very different from the back of a commercial restaurant where grease exposure is part of normal operations.

Project conditions matter.

DCOF vs. R11 and R12: Are They the Same Thing?

No.

You may see both DCOF values and ratings such as R9, R10, R11, R12, or R13 when shopping for tile.

They belong to different test systems.

DCOF information used in the United States is commonly associated with the ANSI A326.3 test framework. R-ratings come from a different slip-resistance testing approach commonly found on European and internationally manufactured products.

Because the procedures and test conditions differ, you should not convert an R11 tile into a specific DCOF number or assume an R12 rating equals a particular ANSI classification.

Instead, read each rating according to the standard under which the product was tested.

If a tile specification lists only an R-rating and you need compliance or suitability under a U.S. project specification, request the manufacturer's appropriate technical documentation.

For a detailed explanation of that separate system, read our R11 and R12 slip-resistant tile guide.

DCOF vs. PEI Rating: They Measure Completely Different Things

Another frequent shopping mistake is confusing slip resistance with durability.

A PEI rating relates to surface wear for glazed tile.

A DCOF value relates to friction under specified test conditions.

They answer different questions.

Specification	Primary Question
DCOF	How does the surface perform in a friction test?
PEI	How resistant is a glazed tile surface to wear?
Water absorption	How much water does the tile body absorb?
Shade variation	How much visual variation should you expect between pieces?
Breaking strength	How does the tile perform under specified structural loading?
Application rating	Where does the manufacturer allow the product to be installed?

A tile can have excellent wear resistance and still be unsuitable for a wet walking surface.

Similarly, a slip-resistant surface is not automatically appropriate for heavy commercial traffic.

Think of tile specifications as a dashboard. You need several gauges to understand the product—not one number.

Our Tile PEI Ratings Explained guide covers the wear side of the decision separately...

Matte Tile Is Not Automatically Slip-Resistant

Matte flooring often provides a more practical walking surface than highly polished tile, but finish names should not replace technical data.

Two tiles marketed as "matte" can have very different:

• Surface textures.
• Glazes.
• Microstructures.
• DCOF results.
• Intended applications.

Likewise, a tile that appears heavily textured may not automatically be appropriate for every wet environment.

Use the finish as a clue, not as proof.

To compare how different finishes affect appearance, cleaning and everyday use, read our guide to matte, glossy and textured tile finishes.

When slip resistance matters, verify the manufacturer's application and technical information for the exact product.

Polished Tile Is Not Automatically "Bad" Tile

Polished tile often gets criticized in slip-resistance discussions, but the real issue is where it is being used. Polished tile can be an excellent design choice for:

• Walls.
• Backsplashes.
• Fireplace surrounds.
• Decorative areas.
• Certain dry interior floors where the manufacturer permits the application.

The problem comes when appearance is prioritized over the conditions of a wet walking surface.

Instead of asking whether polished tile is "good" or "bad," ask:

Is this exact polished product recommended for the floor conditions where I intend to install it?

That is the better purchasing question.

Why Cleaning Changes Slip Resistance

You can buy an appropriate tile and still create a slippery floor through poor maintenance.

Over time, hard flooring can accumulate:

• Soap film.
• Oils.
• Cleaning-product residue.
• Dirt.
• Grease.
• Polishes.
• Sealers.
• Other contaminants.

TCNA notes that DCOF and real-world floor performance can change with contaminants, maintenance, wear, surface condition, and drainage.

This is particularly important in:

• Showers.
• Locker rooms.
• Restaurant kitchens.
• Entrances.
• Pool areas.
• Busy bathrooms.

Do not apply waxes, coatings, topical sealers, or polishing treatments to a floor unless the product manufacturer confirms they are appropriate.

The surface you maintain years after installation may not behave exactly like a clean new tile tested in a laboratory.

Why More Texture Is Not Always Better Either

If slip resistance were the only consideration, every floor could simply be extremely rough.

But flooring also needs to be practical to clean.

A heavily structured tile may offer valuable traction in certain outdoor or commercial environments, but the same deep texture can trap:

• Dirt.
• Grease.
• Mop fibers.
• Soap residue.
• Fine debris.

That makes the buying decision a balance between:

traction + cleanability + intended use + maintenance capability.

A residential powder room does not need the same surface as a commercial food-preparation area.

Choosing more texture than the room needs can create an unnecessary maintenance burden.

The 7 Questions to Ask Before Buying a Tile for a Wet Floor

If you remember only one part of this guide, use this checklist.

1. Is the Tile Actually Approved for Floor Use?

Do not install wall-only tile on a floor simply because the surface appears textured.

2. What Exact DCOF Information Is Published?

Look for wet or dry conditions and the relevant test method.

3. Does the Product Have an ANSI A326.3 Use Classification?

Look for ID, IW, IW+, EW, or O/G where available.

4. Does the Rating Apply to This Exact Finish?

Matte and polished versions of the same collection may behave differently.

5. What Will Actually Contaminate the Floor?

Clean water, soap, rain, mud, grease, pool water, and cooking oil are not interchangeable conditions.

6. Is the Surface Level or Sloped?

Remember that the five ANSI A326.3 use categories do not address ramps or inclined surfaces.

7. Does the Manufacturer Recommend the Exact Application?

When the answer is unclear, do not guess from one technical number.

Check the manufacturer's data sheet or application chart before ordering.

A Simple Room-by-Room DCOF Buying Guide

Area	What to Verify Before Buying
Living room / bedroom	Floor approval and appropriate dry-use classification
Main bathroom floor	Wet-use suitability, wet DCOF/use classification, finish
Powder room	Floor rating and realistic water exposure
Shower floor	Explicit manufacturer approval for shower/wet-area floor use, plus drainage and slope requirements
Residential kitchen	Wet-use suitability, cleanability, finish and spill conditions
Entryway / mudroom	Water, tracked-in dirt, traffic, and wet-use suitability
Patio / walkway	Exterior Wet classification or manufacturer-approved exterior use, plus climate requirements
Pool-adjacent surface	Explicit manufacturer approval for the specific wet exterior/barefoot condition
Commercial food prep	Oils/Greases classification or project-specific manufacturer approval
Ramp / incline	Project-specific professional specification; do not rely on the five standard categories alone

This table is intentionally not a list of universal DCOF numbers.

That is the point.

Correct tile specification begins with how the floor will actually be used.

What If a Product Page Does Not List DCOF?

Do not immediately assume the tile is unsafe or defective.

There are several possible explanations.

The product may be:

• Intended primarily for walls.
• Part of an older collection.
• Tested under another method.
• Manufacturer-declared instead of represented by a single DCOF number.
• A mosaic or heavily structured surface where conventional readings require different interpretation.
• Missing technical data from the retailer's abbreviated product listing.

The next step is to check the manufacturer's technical sheet.

For a wet-floor application, you want clear confirmation that the exact product, finish, and format are appropriate for your intended use.

If that information cannot be confirmed, avoid assuming suitability simply because the tile feels rough when you touch a sample.

Can You Test Slip Resistance by Touching a Tile?

Not reliably.

Running your hand over a tile may help you compare surface texture, but your palm is not a wet shoe, a bare foot, or a standardized friction-testing device.

Likewise, rubbing a tile with your finger in a showroom does not reproduce:

• Body weight.
• Walking motion.
• Water.
• Soap.
• Oils.
• Surface wear.
• Drainage.
• Real footwear.

Samples are extremely useful for checking:

• Color.
• Pattern.
• Surface feel.
• Reflection.
• Texture.
• Cleaning behavior.

But they should support technical information, not replace it.

How to Compare Two Tiles With Similar DCOF Numbers

Suppose Tile A lists a wet DCOF of 0.44 and Tile B lists 0.50.

It may be tempting to declare Tile B the winner immediately.

Before doing that, compare:

1. Were both values produced using the same test method?
2. Are both values wet measurements?
3. Are you comparing the same type of finish?
4. Do both manufacturers approve the intended application?
5. Does one carry a more appropriate use classification?
6. Is one intended for exterior or grease-contaminated conditions while the other is not?
7. How will each tile be cleaned and maintained?
8. Is the space level or sloped?

A raw numerical comparison becomes useful only after the context matches.

Three Common DCOF Buying Mistakes

Mistake 1: "It Is Above 0.42, So I Can Put It Anywhere"

No.

The 0.42 threshold has a defined context within ANSI A326.3 and should not be treated as universal approval for every wet, exterior, sloped, poolside, or grease-exposed floor.

Mistake 2: "This Tile Is Textured, So I Don't Need the Spec Sheet"

Texture can contribute to traction, but it does not replace product-use information.

Mistake 3: "A Higher Number Guarantees Nobody Will Slip"

No flooring specification can make that guarantee.

TCNA specifically states that DCOF alone does not predict whether a person will or will not slip.

How Floors Center Shoppers Can Use DCOF More Effectively

When browsing tile online, start with the application, not the number.

If you need a bathroom floor, begin with tiles intended for bathroom flooring. If you're building a patio, begin with outdoor tiles or porcelain pavers rather than choosing an indoor tile and hoping its DCOF makes it appropriate outside.

Then evaluate:

• Material.
• Floor/wall approval.
• Finish.
• DCOF.
• Product-use classification.
• Water absorption.
• Wear rating where applicable.
• Interior/exterior approval.
• Freeze-thaw performance when relevant.
• Manufacturer installation instructions.

At Floors Center, you can compare thousands of porcelain, ceramic, natural-stone, mosaic, indoor, and outdoor tile options. For wet-area projects, use the technical specifications together with the intended application before placing the order.

If the specification appears incomplete, confirm the manufacturer's technical documentation rather than making a safety-sensitive decision from appearance alone.

Final Takeaway

DCOF is valuable because it gives tile buyers objective information that appearance alone cannot provide.

But the smartest shopper does not ask:

"What DCOF number is safest?"

The smarter question is:

"Is this exact tile appropriate for the conditions of my project, and what evidence does the manufacturer provide to support that use?"

For level interior areas expected to become wet, 0.42 wet DCOF remains an important reference point within ANSI A326.3's Interior Wet classification. But the current standard also recognizes that more demanding conditions require additional context, which is why Interior Wet Plus, Exterior Wet, and Oils/Greases rely on manufacturer declarations rather than one universal number.

Remember the basic hierarchy:

Application first.
Manufacturer approval second.
DCOF and classification third.
Finish, maintenance, drainage, and real-world conditions always considered alongside them.

Follow that process and DCOF becomes genuinely useful rather than another confusing specification on a tile product page.

Frequently Asked Questions

Q) What is a good DCOF rating for tile?

A) There is no universal "good" DCOF value for every application. Under ANSI A326.3, the Interior Wet category can use a measured wet DCOF of at least 0.42 or be manufacturer-declared. More demanding environments such as Exterior Wet and Oils/Greases use manufacturer-declared classifications. Always match the product to the intended application instead of choosing by number alone.

Q) Is DCOF 0.42 good for a bathroom floor?

A) For a level interior bathroom floor expected to become wet, a wet DCOF of at least 0.42 is relevant to the Interior Wet classification under ANSI A326.3. However, the manufacturer must still approve the product for the intended floor application, and factors such as contaminants, maintenance, surface structure, and drainage matter.

Q) Is DCOF 0.42 enough for a shower floor?

A) Do not use 0.42 alone to decide whether a tile belongs on a shower floor. A shower introduces slope, repeated water, soap, barefoot use, and drainage conditions. Verify that the manufacturer specifically approves the exact tile and finish for the proposed shower-floor installation.

Q) Does a higher DCOF mean a tile is safer?

A) A higher result under the same test conditions generally indicates greater measured friction, but it does not guarantee a safer floor in every real-world situation. TCNA explains that contaminants, footwear, surface structure, maintenance, drainage, slope, wear, and other conditions affect slip potential.

Q) Is DCOF the same as slip resistance?

A) No. TCNA specifically states that DCOF and slip resistance are not synonymous. DCOF provides useful comparative test information, but overall slip risk depends on multiple factors.

Q) Is DCOF the same as an R11 or R12 rating?

A) No. DCOF and R-ratings come from different test systems and should not be treated as direct conversions. Use the rating that corresponds to the manufacturer's test data and the requirements of your project.

Q) Does matte tile always have a better DCOF than polished tile?

A) Not automatically. Matte and textured finishes often provide useful traction characteristics, but performance varies by product. Check the technical data for the exact finish rather than assuming all matte tiles behave alike.

Q) Do wall tiles need a DCOF rating?

A) DCOF is primarily relevant to surfaces people walk on. For a backsplash, shower wall, or decorative wall installation, other specifications such as application approval, moisture suitability, size, weight, and installation requirements are normally more important.

Q) Can DCOF change after tile is installed?

A) The friction characteristics of an installed floor can change over time because of wear, dirt, grease, soap, coatings, maintenance practices, or other contaminants. Proper cleaning and manufacturer-approved maintenance remain important after installation.

Q) What should I do if a tile product page does not show a DCOF rating?

A) Check the manufacturer's technical sheet and confirm the intended use of the exact product, finish, and size. Do not assume a tile is appropriate for wet flooring merely because it feels textured or is made from porcelain.