Epoxy or polyurethane for a garage and workshop: how to read the offers

Epoxy: a hard foundation

Epoxy resin bonds very well to concrete, is hard and copes well with point loads, such as a jack or the feet of a heavy tool cabinet. It resists many chemicals. That makes it excellent as a primer and base layer. Its weakness is sensitivity to UV. Exposed to sunlight, for example with the door open to the south, it yellows and dulls over time.

Polyurethane: a tough top layer

Polyurethane is more flexible than epoxy and copes better with abrasion. It does not yellow in sunlight, so it keeps its colour longer. That is why it is used as the top layer, protecting the epoxy and giving the floor its final look. Its flexibility also helps with small thermal movements of the substrate.

A garage with a workshop: what to watch for

A workshop means extra loads: dropped spanners and screwdrivers, hot solder, solvents, oil from the mower. A hard epoxy primer and base layer take the impacts, and polyurethane protects the surface from abrasion and stains. A mat under the workbench protects the floor from sparks and sharp chips. Wipe up solvents and aggressive chemicals immediately, before they soften the coating.

How to read and compare offers

Two offers labelled "resin floor" can describe completely different solutions. When comparing them, check these points.

• How many layers and of what material: primer, base layer, topcoat.
• Whether there is quartz broadcast and in which layer.
• How the concrete will be prepared: grinding, shot blasting or only washing.
• Whether the installer measures substrate moisture before work.
• Whether the offer is epoxy paint, a thin coating, or a full system.
• How long the garage is out of use and the warranty terms.

Why epoxy paint is not a resin floor

Epoxy paint looks similar in an offer, but it is a thin paint coating. It refreshes the look of concrete well, but under car tyres it wears quickly, especially where the wheels turn. For a garage with daily traffic we recommend a full layered system. Paint can make sense in a utility room without wheeled traffic.

Our recommendation

For a private garage, including one with a workshop corner, we recommend an epoxy primer, an epoxy layer with quartz broadcast and a polyurethane topcoat. This combination uses the strengths of both materials: the hardness and adhesion of epoxy and the abrasion and sunlight resistance of polyurethane. We fine-tune the details after seeing the garage and talking about how you use it.

Thickness and texture: why millimetres matter

Offers differ not only in material but also in thickness. A thin paint coating is a fraction of a millimetre and refreshes the look well, but wears through quickly. A full layered system with quartz broadcast forms a much thicker, textured layer that withstands years of wheeled traffic. Ask the installer what the total thickness will be and how many layers make it up.

The grain of the broadcast decides how the floor behaves when wet and how easy it is to clean. A finer grain gives a smoother, easier-to-clean surface. A coarser grain gives more grip. In a private garage we usually look for the middle ground between the two.

Matt, satin or gloss

High gloss looks spectacular in photos, but in a garage it quickly shows scratches, tyre marks and dust. Matt and satin hide everyday use much better and give a calmer look. If the garage is also a showroom for a collector's car, a higher gloss can be considered, knowing it needs more frequent cleaning.

The most common misconceptions

These beliefs often lead to disappointment.

• "Epoxy is best because it is hardest." Hardness is not everything; without a polyurethane topcoat epoxy yellows in sunlight.
• "Resin can go on any concrete." Without preparation and moisture control the coating can peel.
• "A smooth floor is easier to clean, so it is better." It can be slippery when wet, which matters in a garage in winter.
• "Epoxy paint is the same, only cheaper." It is a thin coating, not a floor for wheeled traffic.