What is epoxy flooring?

Epoxy flooring is a seamless resin surface made by applying a two-part epoxy, a resin and a hardener that cure into a hard, durable plastic, usually over a prepared concrete slab. The result is a tough, chemical-resistant, easy-clean floor with no joints for dirt to gather in, which is why epoxy is one of the most common resin systems for garages, workshops, warehouses and commercial units. If you are planning a project rather than researching, our epoxy flooring service page covers the systems, where each is used and how to arrange a free site survey.

Epoxy is often used loosely to mean any resin floor, but it is really one specific chemistry within the wider resin family with its own strengths and its own limits. Understanding what epoxy actually is, how it is built up on a floor and where it performs best is the key to knowing whether it is the right system for a given space. This guide explains what epoxy flooring is, how it is installed, what it is good at and where a different resin suits better.

Key takeaways

• Epoxy is a two-part resin: a resin and hardener cure into a hard, seamless plastic surface over concrete.
• It bonds to a prepared slab: epoxy is only as good as the preparation and the concrete beneath it.
• It is hard and chemical-resistant: excellent abrasion and chemical resistance make it ideal for many industrial floors.
• It has thermal limits: rigid epoxy can struggle with the thermal shock that polyurethane handles better.
• It comes in many builds: from thin coatings to thick, decorative or heavy-duty broadcast systems.
• Specification matters: epoxy suits the right environment and fails early in the wrong one.

What is epoxy flooring made of?

Epoxy flooring is made from a two-part epoxy resin, a base resin and a hardener that are mixed on site and react chemically to cure from a liquid into a hard, solid plastic bonded to the floor. Once cured it is not a coat of paint sitting on the surface but a tough, seamless layer bonded firmly into the prepared surface of the concrete beneath it.

The chemistry is what gives epoxy its character. When the two parts are combined in the correct ratio they cross-link as they cure, forming a dense, hard material that resists abrasion, impact and a wide range of chemicals. Because it is applied as a liquid it flows out into a smooth, joint-free surface and it can be pigmented in almost any colour or built up with decorative flake or quartz. This puts epoxy firmly within the resin family described in our guide to what resin flooring is, as one of the two main resin chemistries used on floors, alongside polyurethane.

How is an epoxy floor installed?

An epoxy floor is installed by mechanically preparing the concrete, priming it, then applying the epoxy in one or more coats, sometimes broadcasting flake or quartz into it and finishing with a seal coat with each layer left to cure before the next. The preparation stage is the most important part, because epoxy bonds mechanically to the slab and cannot stick reliably to a smooth, dirty or damp surface.

In practice the slab is first ground or shot-blasted to open the surface and give the resin a profile to key into and any cracks or defects are repaired. A primer is applied to seal the concrete and promote adhesion, then the epoxy body coats go down, often with coloured flake or quartz aggregate broadcast into a wet coat for grip and appearance. A clear seal coat locks everything in and provides the wearing surface. The detail of that groundwork is covered in our guide to surface preparation for resin flooring and the full step-by-step is set out in our guide to the resin flooring installation process. Get the preparation and curing right and the floor bonds for years; rush them and it can peel.

What is epoxy flooring good at?

Epoxy is good at providing a very hard, abrasion-resistant, chemical-resistant and easy-clean surface at a sensible cost, which makes it an excellent choice for garages, workshops, warehouses, retail units and many commercial and industrial floors. Its seamless finish and wide range of colours and decorative options add to its appeal.

Because the cured surface is so hard, epoxy stands up well to foot traffic, trolleys, forklifts and dropped tools when the build thickness is matched to those loads and because it is sealed it resists oils, many chemicals and staining and wipes clean easily. It can be finished plain, colour-zoned, or with flake or quartz for grip and looks, so it suits everything from a smart garage floor to a hard-working factory. It is also often more economical than a heavy polyurethane screed where the extra thermal tolerance is not needed, which is why epoxy is the default choice across so many dry, hard-wearing environments like those in our guide to the best flooring for warehouses. Where it goes down over sound existing concrete, our guide to resin flooring over existing concrete explains how the slab is assessed first.

What are the limits of epoxy flooring?

The main limit of epoxy is that it is rigid, so it copes less well with thermal shock than a flexible polyurethane and it can crack or debond where a floor is regularly hit with hot wash-downs, steam or rapid temperature swings. It is an excellent floor in the right conditions but the wrong choice for the hottest, wettest process areas.

Because a cured epoxy is hard and relatively inflexible, sharp temperature changes stress it as the floor expands and contracts, which is why in hot and cold food and drink environments a polyurethane screed is usually specified instead. Epoxy also depends entirely on preparation and on the soundness of the slab, so it will fail early over a damp, weak or poorly prepared base whatever its own qualities. Understanding these limits is exactly the point of the comparison in our guide to epoxy vs polyurethane flooring, which sets out where each chemistry belongs. Used in a genuinely dry, cool, hard-wearing space, epoxy is hard to beat; pushed into a hot wash-down zone to save money, it is a false economy.

How much does an epoxy floor cost?

The cost of an epoxy floor depends on the size of the area, the condition of the existing slab, the amount of preparation and repair needed and the build specified, from a thin coating to a thick decorative or heavy-duty system, so a survey gives a far more reliable figure than a headline rate. Preparation and slab condition often move the price more than the resin itself.

A simple coating on a sound, clean slab is at the lower end, while a floor that needs extensive grinding, crack repair, a damp-proofing layer or a thick broadcast build costs more because there is more work and more material involved. Because those variables differ so much from job to job, an accurate price comes from assessing the actual floor rather than a per-square-metre guess. The factors that drive the number and typical ranges, are set out in our cost guidance and the same logic applies: the honest way to price an epoxy floor is to survey it first.

What are the main types of epoxy floor build?

The main types of epoxy floor build are thin roller-applied coatings, self-smoothing floors and heavy-duty broadcast or screed systems, each carrying more material and more strength than the last. The right build depends on how hard the floor will work, from a light seal on a sound slab to a thick industrial layer that takes forklifts and impact, which is why the build is matched to the space rather than chosen by default.

A thin roller-applied coating is the lightest option, brushed or rolled on in one or more coats to seal and colour a slab for a garage, workshop or lighter commercial floor where the demands are modest. A self-smoothing epoxy is poured and allowed to flow out into a thicker, level, seamless surface that evens out minor imperfections and gives a smart, hard-wearing finish for busier commercial areas. Broadcast and screed systems are the heavy-duty end, built up thick with quartz or other aggregate scattered into the resin to create a dense, impact-resistant, often slip-resistant floor for industrial and demanding use. The heavier the traffic, chemistry and impact a floor faces, the thicker and stronger the build specified, which is the same matching judgement that runs through all resin work.

Frequently asked questions

Is epoxy flooring the same as resin flooring?

Not exactly. Epoxy is one type of resin flooring, a specific two-part chemistry, within a wider family that also includes polyurethane. People often use resin and epoxy interchangeably, but they are not identical and knowing the difference matters because epoxy and polyurethane suit different conditions. Epoxy is hard and chemical-resistant; polyurethane is more flexible and heat-tolerant.

How long does an epoxy floor last?

A well-installed epoxy floor typically lasts many years, often a decade or more in commercial use, when it is laid on a sound, well-prepared slab and matched to its environment. The lifespan depends far more on the substrate, the specification and the quality of installation than on the resin wearing out, which is why preparation is treated as the foundation of a lasting floor.

Can epoxy be laid over existing concrete?

Yes, provided the concrete is sound, dry and properly prepared. The slab is assessed for strength, moisture and defects, then mechanically ground or blasted to give the epoxy a profile to bond to and any cracks are repaired first. Epoxy laid over a damp, weak or unprepared slab can peel, so the condition of the existing concrete decides whether it is a suitable base.

Is epoxy flooring slippery?

A plain epoxy floor can be smooth, but slip resistance is easily built in by broadcasting flake or quartz into the surface or adding a fine anti-slip aggregate to the seal coat. The finish is matched to the conditions with more grip in wet or greasy areas and a smoother finish where cleanability leads, so a properly specified epoxy floor keeps its grip in normal use, though any floor can become slippery if spills and contamination are left to sit.

Is epoxy or polyurethane better?

Neither is universally better; they suit different conditions. Epoxy is harder and more chemical-resistant, ideal for dry, hard-wearing floors, while polyurethane is more flexible and heat-tolerant, better for hot wash-downs, thermal shock and cold stores. The right choice depends on the environment, which is why many sites use both, matched zone by zone rather than choosing one for everywhere.

How long does an epoxy floor take to install?

It varies with the size, the build and the slab condition, but a typical epoxy floor takes several days from preparation to a usable surface. The slab is prepared and primed, the coats go down with curing time between each and the seal coat then needs time to harden before foot and full traffic. A larger area or extensive repairs and damp-proofing add time, so the schedule is confirmed after a survey.

Get the right system specified

So epoxy flooring is a seamless, hard, chemical-resistant resin surface built from a two-part epoxy over a prepared concrete slab, ideal for garages, workshops and many commercial and industrial floors with its main limit being the thermal shock that a flexible polyurethane handles better. Matching the chemistry to the environment and laying it on a properly prepared base, is what makes an epoxy floor last.

If you are planning an epoxy floor and want it specified correctly, the next step is a survey. We explain the slab, the environment and the right system across our commercial resin flooring and subfloor preparationguidance and arrange installation through experienced specialist contractors with a written quotation and no obligation. Contact us to arrange one.