Resin Floor Thickness Guide: 0.5 mm to 12 mm
What each resin floor thickness actually delivers, from thin roller-applied coatings to 12 mm polyurethane screeds, and how to avoid over- or under-specifying.
Thickness is the specification decision that most affects both performance and price. Too thin and the floor wears through or telegraphs every defect below it; too thick and you are paying for material the building will never need.
0.3–0.5 mm — sealers and thin coatings
Roller-applied coats that seal concrete, stop dust and give a cleanable surface. Suitable for light foot traffic, storage areas, plant rooms and dry stores. They follow the profile of the substrate exactly, so any unevenness stays visible. Expect to recoat periodically in trafficked areas.
0.5–1 mm — epoxy high build
The workhorse of industrial flooring. Two or more coats of high-solids epoxy, optionally with an anti-slip aggregate. Takes forklift and pallet traffic, resists oils and dilute chemicals, sweeps and scrubs clean. This is the right answer for most warehouses, distribution units and workshops where the slab itself is sound.
2–4 mm — self-levelling epoxy and self-smoothing polyurethane
Flow-applied systems that smooth out minor substrate variation and give a seamless, monolithic wearing layer. Choose this where you need a genuinely flat, easy-clean, higher-wear floor: assembly and machining areas, laboratories, showrooms, schools, healthcare and corridors. Matt polyurethane in this band gives a warmer, less clinical finish than epoxy.
3–6 mm — MMA systems
Flake and quartz MMA build-ups in this range give a durable, decorative, chemically resistant floor with rapid return to service and low-temperature installation. Specified where downtime or cold conditions drive the decision.
6–9 mm — polyurethane HF screed
Trowel-applied polyurethane cementitious screed. Handles wash-down, steam cleaning, thermal shock, food acids and heavy stillage and pallet traffic, and can be laid to falls with integral coving. The standard specification for food and beverage production, commercial kitchens, dairies, breweries and cold stores.
9–12 mm — heavy-duty polyurethane screed
The same family laid thicker for the most severe mechanical and thermal duty: hot process areas, tracked plant, heavy impact, deep falls to drainage or where a worn slab needs building back up.
Common specification mistakes
- Using a thin coating to hide an uneven slab. It will not; grind or level first.
- Specifying epoxy at any thickness for steam cleaning or thermal shock. That is a polyurethane job.
- Paying for 9 mm PU in a dry storage area that needs a 0.5 mm epoxy.
- Ignoring falls and drainage. Thickness must accommodate the fall being built.
- Forgetting upstands and coving, which have to be detailed in the same system.
If you tell us the traffic, the cleaning regime, the temperature range, the chemicals present and the acceptable downtime, we will specify the thinnest build-up that will genuinely do the job — and explain what we ruled out and why.