What Type Of Stairs Must Include Slip Resistant Treads

Ever walked up a staircase on a rainy day and felt your foot slide like you were on ice?
So you’re not imagining it—many building codes actually require certain stairs to have slip‑resistant treads. If you’ve ever wondered which stairs those are, why the rule exists, and how to make sure you stay on your feet, keep reading.

What Is a Slip‑Resistant Tread?

In plain English, a slip‑resistant tread is the surface of a stair that’s been treated or built so you don’t lose traction. Think of it as the “grippy” part of the step. It can be a rough‑textured concrete, a metal plate with a diamond pattern, a vinyl strip with a sand‑embossed finish, or even a carpet with a low‑pile weave.

The key is that the material or finish meets a measurable coefficient of friction—usually set by local building codes or safety standards. When that number is high enough, the tread is considered “non‑slip” and can be used in places where a slip could mean a serious injury.

Where Do These Treads Show Up?

You’ll find them most often in:

Commercial and public buildings – malls, hospitals, schools, office towers.
Industrial facilities – factories, warehouses, loading docks.
Outdoor or semi‑outdoor stairs – fire escapes, exterior entryways, pool decks.
Special‑use areas – stairways leading to wet rooms, kitchens, or any place where water, oil, or chemicals are common.

Why It Matters / Why People Care

A slip on a stair can turn a quick trip into a broken wrist, a concussion, or worse. In a workplace, that one fall can trigger workers’ compensation claims, downtime, and even lawsuits.

From a building‑owner’s perspective, the cost of retrofitting a staircase after an accident is far higher than installing the right tread from the start. And let’s be real—no one wants a “wet floor” sign plastered on every step.

Regulators care because they’re trying to keep the public safe. Most jurisdictions have adopted standards from the International Building Code (IBC) or the American National Standards Institute (ANSI) that spell out exactly when a stair must be slip‑resistant. Ignoring those rules isn’t just risky; it can land you in a code violation and a hefty fine.

How It Works (or How to Do It)

Below is the step‑by‑step rundown of how to determine whether a set of stairs needs slip‑resistant treads, and what options you have to meet the requirement.

1. Identify the Stair Type and Location

First, ask yourself:

Is the stair interior or exterior?
Does it serve the public (customers, patients, students) or employees only?
Is it in a wet area (near a kitchen, bathroom, pool) or a dry area?

If the answer is “yes” to any of those, you’re probably looking at a code‑mandated slip‑resistant requirement.

2. Check the Applicable Code

Most U.S. 1 for accessibility and ANSI A326.3 for slip resistance. states follow the IBC, which references ANSI A117.Internationally, the UK uses BS 8300 and the EU leans on EN 14122‑1.

What you’re looking for is the coefficient of friction (COF) value. A COF of 0.5 or higher is the typical minimum for public stairs. Some high‑traffic or outdoor stairs bump that up to 0.6.

3. Choose the Right Material

Here’s a quick cheat sheet:

Material	Typical COF	Where It Shines
Rough‑textured concrete	0.Worth adding: 55‑0. 65	Outdoor fire escapes, industrial floors
Aluminum or steel plates with diamond grit	0.6‑0.7	Commercial lobbies, stairwells with heavy foot traffic
Vinyl or PVC strips with sand‑embossed surface	0.5‑0.Which means 6	Interior office stairs, schools
Carpet (low‑pile, dense)	0. So 5‑0. 55	Residential homes, low‑traffic areas
Epoxy coating with anti‑slip aggregate	0.55‑0.

4. Install the Treads Properly

Even the best material will fail if it’s not installed right.

Clean the substrate – remove dust, oil, or old adhesive.
Apply a primer if the manufacturer recommends it; this helps the tread bond.
Lay the tread – press it firmly, making sure there are no air pockets.
Seal the edges – especially for outdoor stairs, sealants prevent water from seeping underneath.
Test the slip resistance – a simple “wet foot” test can give you a feel, but for compliance you’ll need a tribometer reading.

5. Maintain the Surface

Slip resistance can degrade over time. Keep an eye on:

Want to learn more? We recommend who is responsible for conducting a hazard assessment and how does osha enforce its standards for further reading.

Wear and tear – replace strips that are worn smooth.
Build‑up of debris – clean regularly; sand, oil, or snow can mask the texture.
Moisture – ensure drainage so water doesn’t pool on the tread.

Common Mistakes / What Most People Get Wrong

Thinking “any carpet = slip‑resistant.”
A plush, high‑pile carpet feels soft, but it can become a slick when wet. Only low‑pile, dense carpet meets most codes.
Using the wrong COF rating.
Some manufacturers quote a “dry” COF that looks good on paper. The required rating is usually the wet COF, which is lower. Always verify the wet rating.
Skipping the edge seal on outdoor stairs.
Water seeps under the tread, lifts it, and the whole system loses its grip. A simple sealant can prevent that whole headache.
Assuming a “nice looking” finish is enough.
A polished stainless‑steel stair might look sleek, but without a textured pattern it can be dangerously slick.
Neglecting regular inspections.
Slip resistance isn’t a set‑and‑forget thing. A quarterly walk‑through can catch problems before they cause a fall.

Practical Tips / What Actually Works

Start with the code, not the aesthetic. It’s easier to design a stair that looks good and meets the COF than to retrofit later.
Buy from reputable suppliers who provide a test report showing the wet COF.
Consider modular slip‑resistant strips for retrofits. They’re easier to replace if they wear out.
Use a clear “non‑slip” label on the tread edge—helps inspectors and reminds occupants.
Train maintenance staff to recognize early signs of wear and to clean the treads with a pH‑neutral cleaner; acidic or alkaline solutions can erode the texture.

FAQ

Q: Do residential stairs need slip‑resistant treads?
A: Generally no, unless they’re in a wet area (like a pool deck) or the home is a multi‑unit building subject to commercial codes.

Q: Can I just paint my stairs with anti‑slip paint?
A: Anti‑slip paint can work, but only if it’s certified to meet the required COF. Many cheap paints look “grippy” but fail the test.

Q: How often should I test the slip resistance?
A: At least once a year, or after any major cleaning, resurfacing, or after a spill that required a lot of water.

Q: Are there any eco‑friendly slip‑resistant options?
A: Yes—recycled rubber treads, bamboo with a sand‑embossed finish, and low‑VOC epoxy coatings are all greener choices that still meet COF standards.

Q: What’s the cheapest way to meet the requirement on an existing stair?
A: Self‑adhesive vinyl strips with a sand‑embossed surface are usually the most budget‑friendly and easy to install.

Stairs are one of those everyday things we barely think about—until they betray us. Knowing which stairs must have slip‑resistant treads, why the rule exists, and how to get it right can keep you, your employees, or your customers safely on their feet.

So next time you design or renovate a stairwell, give the tread a little extra attention. It’s a small step that makes a huge difference.