December 03, 2023

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Why Pressure Washing Flat Surfaces Is an Essential Service

Why Pressure Washing Flat Surfaces Is an Essential Service

by Craig Harrison, President of Front 9 Restoration and Eco Friendly Power Washing

Craig Harrison, Founder of F9 Restoration and Eco Friendly Power Washing

During this time of crisis, pressure washing companies are being questioned if we are considered an “essential service.” So, are we?

My answer is a 100% resounding YES. But you have to understand why, and in which circumstances it applies.

Essential Services and COVID-19

During this time of crisis, “essential services” consist of two types for our industry:

  1. Health and Safety, and
  2. Sanitization/Disinfection.

I can classify almost any flat hard surface cleaning so that it falls into the “Health and Safety” category. My pressure washing and restoration company, Eco-Friendly Power Washing, has been pressure washing in the name of health and safety for 20 years. In fact, it was an insurance company that first wanted us to put the wording “health and safety” into one of our contracts! Because of that wording, their client got a discount on their insurance premium that more than paid for our monthly services that cost them $2500 a month. But it wasn’t just a way to help them get a discount on their insurance. We were, indeed, cleaning for health and safety.

Let’s look at this a little deeper.


 Why Should Pressure Washing  Flat Surfaces Be Considered “Health and Safety?” 


Every time you put pressurized water or you soft wash a flat surface to get rid of organic staining or surface contaminants, there are two (2) actions that take place:

  1. You have the physical action of that surface looking better. This is known as “cleaning.”
  2. You have the legal action of that surface gaining better traction. This is called the Coefficient of Friction (COF), and it helps reduce slip and fall risk.    

Now, let’s completely disregard #1 — i.e., cosmetic cleaning. We don’t focus on that. Cosmetic cleaning is not a term applicable to our industry in my opinion.  Almost every cleaning of flat, walkable surfaces should be considered health and safety cleaning because you improve the COF during the process.

So, let’s focus on #2.  If the surface contains dirt, dust, sands, oils, mold, mildew, algae, food grease, sodas, grime, calcium, calcium carbonate, or calcite, what happens?  It will, on some level, become more slippery than if the concrete didn’t have these stains.  This is the COF.  Under the Americans with Disabilities Act, the COF of walkable surfaces needs to be above .05 SCOF (Static Coefficient of Friction).  The DCOF (Dynamic Coefficient of Friction) should be a minimum of 0.42. This is verifiable with measurements taken with a Tribometer, primarily the BOT3000E, that insurance companies use to measure concrete when a slip and fall happens.

When someone slips, trips and falls at a person’s home, outside a store, or on a sidewalk, one of the most common questions is “who’s responsible?” In most cases, it’s the property owner.

Pressure washing or soft washing porous surfaces such as concrete helps remove contaminants to make surfaces less slippery and safer to walk on.

Premises liability is the legal responsibility that property owners have for injuries that occur on their property due to slip and fall accidents. If a person slips, trips, or falls as a result of a dangerous or hazardous condition – such as slippery concrete – the property owner may be fully responsible. In general, property owners are held accountable for falls that result from slippery walkable areas.


How Is Slip Resistance Measured?

Slip resistance is generally measured by defining the Coefficient of Friction (COF) between two surfaces. An example is the relationship between a shoe and a floor surface.

There are two COF measures under the American Disability Act: Static and Dynamic. Let’s look at these closer.

  1. Static Coefficient of Friction (SCOF) refers to the force necessary to start a body moving. In the U.S., up until 2012, the Static COF was the customary method of measuring slip resistance. The COF is generally measured between 1.0 for very rough surfaces (e.g., sand-paper) and extremely slippery surfaces at 0.0 (e.g., water or ice). The American National Standards Institutes’ (ANSI) A 1264.2-2001 “Standard for the Provision of Slip Resistance on Walking & Working Surfaces” suggests a Static COF of approximately .05 for walking surfaces under dry conditions.
  2. Dynamic Coefficient of Friction (DCOF) is the new industry standard for measuring a surface’s slip resistance, and is quickly replacing Static Coefficient of Friction (COF) tests. Here’s what you need to know about the new testing:
  • DCOF measures slip resistance during motion while SCOF measures slip resistance to put an object in motion. This means the new standard more accurately measures a surface’s slip resistance when walking.
  • The SCOF measures the “slip potential,” or how much traction it takes to induce a slip, while the DCOF quantifies a person’s stopping ability once he or she begins to slip. Walkways with a wet static COF of .60 or greater and a wet dynamic COF of .42 or greater are defined as “High Traction” under the American National Standards Institute (ANSI) B101.1 and B101.3 standards.
  • The DCOF testing standard is always conducted with a wet, slightly soapy solution of .05% Sodium Laurel Sulfate and Water. That is why there is only one score, and not a wet and dry score which was the old standard.
  • Unlike SCOF testing, the new DCOF test is more accurate and can be conducted in the field with a portable machine called the BOT3000.
  • The DCOF standard for porcelain ceramic tile is 0.42.
  • DCOF values of a surface will change over time. Understanding a material’s abrasion resistance and overall strength will help predict the durability of the finish.

OSHA also weights in on this. “The Occupational Safety and Health Administration recommends that walking surfaces have a static coefficient of friction of 0.5. A research project sponsored by the Architectural and Transportation Barriers Compliance Board (Access Board) conducted tests with persons with disabilities and concluded that a higher coefficient of friction was needed by such persons. A static coefficient of friction of 0.6 is recommended for accessible routes and 0.8 for ramps.”

So, when the surfaces are completely free of these contaminants, the surface becomes more slip resistant, which leads to fewer slip and fall hazards — every time! By cleaning concrete and exterior walkable surfaces in the nature of Health and Safety, you increase the COF of the concrete.

By cleaning concrete and exterior walkable surfaces in the nature of Health and Safety, you increase the COF of the concrete.  By increasing the COF level of that surface, you decrease the slip and fall risk.  If the traction level (COF) of the concrete is not up to ADA Standards, the homeowner or property owner can be held responsible for injuries under Premises Liability.


Pressure Washing Should Also Qualify Under Sanitization/Disinfection 

As I mentioned towards the beginning of this piece, during the COVID-19 crisis, “essential services” consists of either health and safety or sanitization/disinfection. While I always promote my services as qualifying under health and safety, in this case, they should qualify under sanitization and disinfection as well.  Let’s look at why.

Current evidence suggests that COVID-19 may remain viable for hours to days depending on the surface. The best practice measure for prevention of COVID-19 and other viral respiratory illnesses in households and community settings is cleaning visibly dirty surfaces, followed by disinfection.

  • Cleaning(Pressure Washing) refers to the removal of germs, dirt, and impurities from surfaces. It does not kill germs, but by removing them, it lowers their numbers and the risk of spreading infection.
  • Disinfecting refers to using chemicals, for example, EPA-registered disinfectants (like Sodium Hypochlorite), to kill germs on surfaces. This process does not necessarily clean dirty surfaces or remove germs, but by killing germs on a surface after cleaning, it can further lower the risk of spreading infection.

For soft, porous surfaces such as carpeted floor, rugs, and drapes, the CDC recommends removing visible contamination if present, then cleaning with appropriate cleaners indicated for use on the surfaces. After the porous surfaces are cleaned, the EPA recommends using products approved for disinfecting SARVS-CoV-2 and that are suitable for porous surfaces.

As pressure washing contractors, we are doing the same thing for other porous surfaces, such as concrete. We are first cleaning the surface, then applying a CDC-recommended and EPA-approved disinfectant.

Pressure Washing IS Essential!

Understanding why we are essential can go a long ways to not only helping the industry continue to work during this unprecedented time, but also to allow us to join in the fight against spreading COVID-19.

To help with the effort, I’ve sent a letter to Health and Human Services Secretary Azar. You can read the entire letter here, and I’m including the primary point of the letter below. As I wrote:

During this unprecedented time of crisis, Power Washing/Pressure Washing Companies are needed more than ever.  We cannot let our exterior walkable surfaces of homes and commercial properties become unclean, unkept and unsanitized.  If so, accumulations of human feces, bird feces, oils, mold, mildew, algae, dirt, dust, debris, allergens, sand particles, food grease, sodas, grime, calcium, spit, vomit and now, COVID-19, can build up, become a slip and fall hazard, or quite possibly the COVID-19 could be tracked inside commercial buildings/homes to be spread much more easily.

By cleaning concrete and exterior walkable surfaces in the nature of Health and Safety, we increase the COF of the concrete.  By increasing the COF level of that surface, we decrease the slip and fall risk.  If the traction level (COF) of the concrete is not up to ADA Standards, the homeowner or property owner can be held responsible for injuries under Premises Liability.  After cleaning, the Disinfecting or Sanitizing process can happen by spraying EPA Registered Products that are suitable for the surface just cleaned.

Please help me help our Contractors reduce the spread of COVID-19 and reduce the risk of infecting others.  If I could get, on your company letterhead, an approval that Health and Safety Pressure Washing Companies who use EPA Registered Disinfectant Products may keep working at this time, I think this would be a great step toward reducing the overall risk profile of COVID-19 and  help keep our slip and fall risks low.

A Final Call to Action

It’s time for us as pressure washing companies to realize our value, think out of the box, and become who we were meant to be. We are a very important part of the cleaning chain and we literally save lives every day by the cleaning that we do!



About the Author: Craig Harrison is a Veteran Hard Surface Restoration Contractor. He is the President of Eco-Friendly Power Washing, Inc. and President of Front 9 Restoration Inc. Craig is the inventor of F9 Products, Processes and the F9 Cookbook, which is available through a 3 pound fully laminated book with full color before and after pages. It is also available as a mobile App in the Google Play and Apple Stores.

Throughout his 28 years in pressure washing, Craig discovered systems that could simplify stains into one of four Processes. This made restoration easy! His Products, F9 Double Eagle, F9 Efflo, F9 BARC and F9 Groundskeeper were developed to clean over 140 different stains using one of these four Processes. From 1998 to 2008, Craig hired chemists to help him streamline his four products to work faster with safety in mind. Recently, Craig wrote the 100 page F9 Cookbook to tie all of these processes together, forever simplifying the art of Hard Surface Restoration.  You can join the F9 Restoration Professionals Facebook Group here

Craig currently resides in Fountain Hills, AZ and travels providing free consulting, education, training and solutions for small and large-scale businesses.

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