Resin Floor Installation: What To Expect, Step By Step

Before anyone mixes resin: the survey

The first visit is about the slab, not the colour chart. We look at what the room is used for, what rolls or drips across it, whether there is an old coating, and where the joints and cracks are. A moisture reading is taken because resin applied over a damp slab is the classic route to blistering. Above about 75 percent relative humidity a moisture tolerant primer or a polyurethane concrete system is specified instead of a standard epoxy.

That survey is also where the system is chosen. A domestic garage, a workshop bay and a food production floor need different builds, and naming the product before anyone has seen the concrete is guesswork.

Clearing the room and planning access

On commercial sites this is often the part that needs most coordination. Phasing a floor in bays lets a business keep trading, but only if the phases are fixed before work starts.

• ✓Empty the space fully; resin cannot be laid around stored items
• ✓Agree where the grinder, vacuum and mixing station will sit
• ✓Plan ventilation and keep doors to the rest of the house or building closed
• ✓Decide how people and vehicles will get round the area while it cures
• ✓Mark any drains, joints or services that must stay accessible

Mechanical preparation day

1. 1
   Grind or shot blast

   Diamond grinding or captive shot blasting removes laitance, weak surface and old sealers and opens a profile the primer can grip.

2. 2
   Repair

   Static cracks are stitched with resin and quartz, holes are filled and high spots taken down.

3. 3
   Detail joints

   Movement joints are opened and carried through the new floor rather than buried under it.

4. 4
   Vacuum

   Dust is removed with industrial extraction so nothing sits between concrete and primer.

Washing or etching alone does not replace this stage. A clean floor can still have a surface the resin will not hold to.

Priming, body coats and the finish layer

The primer soaks into the prepared surface and gives every following coat something consistent to bond to. After that the build depends on the system: a thin epoxy coating around 0.4 to 1 mm for garages and light industrial duty, an epoxy screed of 3 to 6 mm where impact and wear are heavier, or polyurethane concrete of 6 to 9 mm for hot washdown and chemical exposure.

Flake or quartz can be broadcast into a wet coat for texture and grip. The finish coat then sets the sheen and the slip rating. Each layer has a window in which the next must go on, so the order of days is dictated by the chemistry rather than by convenience.

Handover and the first week

You will be given two dates, not one: when the floor can take foot traffic and when it can take wheels or loads. For epoxy that is typically 12 to 24 hours and around 72 hours respectively. Using the floor at the walkable point as if it were fully cured is the most common way to mark a new surface.

Keep the floor dry and avoid dragging anything across it during the first days, then clean with a pH neutral cleaner rather than harsh solvents.