How to Price an Epoxy Garage Floor: Labour, Materials and Margin Guide

Quick Answer: A domestic epoxy or resin garage floor coating in the UK typically costs £40–£90/m² installed, with most jobs landing around £55–£70/m² for a flake or 100% solids system on a sound slab. A single garage (15–18m²) runs roughly £700–£1,400 and a double (30–36m²) £1,400–£2,800. Surface preparation — mechanical grinding plus moisture testing — is where most of the cost, time and risk sits. Skip the moisture test and you risk delamination, a callback, and a redo at your own expense.

Summary

An epoxy garage floor is one of those jobs where the visible product (a glossy, hard-wearing coloured floor) is a small fraction of the actual work. The resin itself is cheap relative to the cost of getting the concrete ready to receive it. A tradesperson who prices on materials and a day's labour, then underestimates prep, will lose money on almost every job. The single biggest driver of both price and risk is the condition of the existing slab: how contaminated it is, whether it holds moisture, and how much mechanical preparation it needs.

This guide breaks the job into its real cost components — system type, surface prep, primer, number of coats, cure times and labour days — and shows where margin is made and lost. The pricing here is realistic for 2026 UK domestic work. It deliberately describes system categories rather than recommending brands, because the right system depends on the slab, the use case and the customer's budget, not on a label.

The recurring theme throughout is that prep is the job. Diamond grinding or shot blasting, crack and joint repair, oil decontamination and — critically — moisture testing the slab are what separate a coating that lasts ten years from one that peels in six months. Quote the prep properly, test the moisture before you commit to a price, and build in contingency for what you find once the floor is ground back.

Key Facts

• Installed price (typical) — £40–£90/m², most domestic jobs £55–£70/m² for a flake or solids system on a sound floor.
• Single garage (15–18m²) — roughly £700–£1,400 installed; a basic water-based two-coat job can come in lower, a polyaspartic flake system higher.
• Double garage (30–36m²) — roughly £1,400–£2,800 installed; per-m² rate usually drops slightly on larger areas as setup is amortised.
• Water-based epoxy — cheapest system, ~£8–£15/m² in materials, thinner build, more coats, shorter lifespan in heavy use.
• Solvent-based epoxy — mid-cost, better penetration, strong solvent smell, ventilation and COSHH controls needed.
• 100% solids epoxy — high build per coat, ~£15–£30/m² materials, very durable, short pot life and fast working time.
• Polyaspartic topcoat — fast-curing (often walk-on same day), UV-stable, ~£20–£40/m² materials, often used over an epoxy basecoat.
• Flake/chip system — decorative vinyl flakes broadcast into a basecoat then sealed; adds ~£5–£15/m² and one extra labour stage.
• Materials cost (whole system) — typically £12–£40/m² depending on system and number of coats.
• Primer — almost always required on bare concrete; £3–£8/m² and a separate coat/day in the schedule.
• Coats — most systems are primer + one or two build coats + optional topcoat: 2–4 coats total.
• Cure / recoat windows — most epoxies need 12–24 hours between coats at 20°C; full chemical cure 5–7 days.
• Vehicle traffic — do not let the customer park on a fresh epoxy floor for ~7 days; foot traffic usually after 24–48 hours.
• Labour — a single garage is typically 1.5–3 working days spread over several calendar days due to cure times.
• Temperature — most epoxies need the slab above ~10°C and falling, not rising, to cure properly; cold garages in winter are a problem.
• Moisture — relative humidity in the slab above ~75% (or high hygrometer/calcium chloride readings) risks osmotic blistering and delamination. Test before you quote a firm price.
• VAT — domestic garage coatings are standard-rated at 20%; this is a refurbishment, not a zero-rated new build.

Quick Reference Table

Detailed Guidance

System Types and Cost

There is no single "epoxy floor". The category covers several resin chemistries, each with a different cost, build thickness, cure behaviour and durability. Pricing the wrong system for the use case is a common error — fitting a thin water-based coat in a garage where the customer parks a heavy 4x4 and uses a trolley jack will lead to wear-through and a complaint.

• Water-based epoxy is the cheapest and easiest to apply, with low odour and easy clean-up. It builds a thin film, so it needs more coats for the same protection and won't take the same abuse as a solids system. Good for light-use garages and tight budgets.
• Solvent-based epoxy penetrates the concrete well and bonds strongly, but carries a strong solvent smell and needs proper ventilation and COSHH controls. Increasingly less common as low-VOC alternatives improve.
• 100% solids epoxy contains no carrier that evaporates, so it builds a thick, hard, durable film in fewer coats. The trade-off is a short pot life and fast working time — once mixed, you commit. This is the workhorse for hard-wearing domestic and light-commercial garages.
• Polyaspartic is technically a polyurea-based topcoat, not an epoxy, but it's sold in the same market. It cures very fast (often walk-on the same day), is UV-stable so it won't yellow, and is highly abrasion-resistant. It's usually applied as a topcoat over an epoxy basecoat, which is why it sits at the top of the price range.
• Flake (chip) systems broadcast coloured vinyl flakes into a wet basecoat, which are then sealed with a clear coat. They hide imperfections, add slip resistance and look premium, but add a labour stage and material cost.

When you quote, name the system category and the number of coats. "Two-coat 100% solids epoxy with a polyaspartic UV topcoat" tells the customer (and protects you) far better than "epoxy floor".

Surface Preparation — Where the Cost Is

This is the section every accurate quote lives or dies on. The coating only performs as well as its bond to the concrete, and that bond is created by mechanical preparation, not by the resin. Bare, sealed, painted or laitance-covered concrete will not hold a coating reliably.

• Diamond grinding is the standard mechanical prep for domestic garages: a rotary grinder with diamond segments removes laitance, old coatings and surface contamination and opens a profile for the resin to key into. Budget £8–£18/m² and dust extraction.
• Shot blasting fires steel shot at the floor and recovers it; it's faster on larger or heavily contaminated areas and leaves a more aggressive profile. More setup, so usually reserved for bigger jobs.
• Oil and grease contamination is common in garages and must be removed before grinding, because grinding alone smears oil deeper. Degreasing, and sometimes localised removal of saturated concrete, adds cost that you can't see until you survey the floor.
• Crack, joint and pinhole repair is done after grinding, once defects are exposed. Resin mortar or filler is used; price per repair and survey the floor before committing, because what's under a dirty slab is unknown at the doorstep.

Because so much of the prep cost depends on what you find after grinding, the safest approach is to either survey thoroughly first or write a clear allowance into the quote with a stated assumption ("price assumes sound concrete free of major contamination; significant oil saturation or structural cracking will be quoted separately").

Moisture and the Slab

Moisture is the number-one cause of epoxy floor failure, and the moisture test is the cheapest insurance you will ever buy on this job. Garage slabs — especially older ones, ground-bearing slabs without a damp-proof membrane, or slabs below external ground level — can carry significant moisture up through the concrete. When an impermeable epoxy is laid over a damp slab, water vapour pressure builds underneath and pushes the coating off in blisters (osmotic blistering) or causes wholesale delamination.

• Test before you quote a firm price. Use a calibrated hygrometer / relative humidity probe (the in-situ RH method is the recognised approach) or a calcium chloride test. A surface moisture meter alone is not enough — it only reads the top few millimetres.
• Know the threshold. As a general working figure, slab relative humidity above roughly 75% is a red flag for standard epoxy systems; check the manufacturer's data sheet for the specific product's limit.
• Have a plan for a wet slab. If the slab fails the moisture test, you either install a moisture-suppression / damp-proof membrane primer (a real additional cost) or you decline the standard system. Quoting a normal epoxy job on a wet slab and hoping is how you end up redoing it for free.

This is the single most important line in this guide: a quote that doesn't account for moisture is a quote you may have to honour twice.

Labour and Cure Times

The labour reality of epoxy is that you are paid for skilled days but the job is stretched across calendar days by cure windows. You can't compress it. A single garage might be 1.5–3 actual working days — grind and prep day one, prime, coat, recoat, and topcoat over subsequent days — but the customer's garage is out of action for the best part of a week.

• Recoat windows are typically 12–24 hours at 20°C; cooler slabs cure slower and may push you to a second visit.
• Foot traffic usually after 24–48 hours; vehicle traffic generally not before ~7 days, when chemical cure is complete.
• Temperature matters. Most epoxies want the slab above ~10°C, and ideally with the slab temperature stable or falling rather than rising (a rising slab off-gasses and causes pinholing/outgassing bubbles). Unheated winter garages are a genuine scheduling constraint — factor a heater or reschedule, and price it.
• Mobilisation — grinder hire/transport, dust extraction, masking and clearing the garage all eat time that doesn't show on a per-m² rate. On a small single garage this fixed setup is a bigger proportion of the job, which is why small jobs carry a higher effective £/m².

Margin and Quoting

Margin on epoxy floors is made by pricing the prep honestly and protecting yourself against the unknowns under the slab. The resin is a predictable material cost; the prep and the moisture are where money leaks.

• Quote the system explicitly — chemistry, coats, topcoat — so you're not held to a premium finish on a budget price.
• Survey or allow. Either inspect and moisture-test before pricing, or state assumptions and exclusions clearly so extra prep is chargeable.
• Don't average away small-job setup. A single garage carries proportionally more fixed cost (grinder, masking, travel) than a double. Reflect that in the per-m² rate rather than under-pricing the small job.
• Build in a contingency for crack repair and contamination found after grinding.
• Add VAT at 20% — domestic garage coatings are standard-rated.

A typical clean single-garage quote might read: grinding and prep, primer, two coats of 100% solids epoxy, flake broadcast and clear seal, all materials, 1.5–2 days labour, plus VAT — landing around £1,000–£1,400. Strip out the flake and topcoat and use a water-based system and you're nearer £700–£900.

Common Mistakes

• Skipping the moisture test. The headline failure mode. No test, no defence when the floor blisters.
• Under-pricing prep. Quoting "a day's labour plus materials" and finding the slab needs heavy grinding and oil removal.
• Coating over old paint or sealer. Without mechanical removal the new system bonds to the old failing layer, not the concrete.
• Ignoring temperature and outgassing. Coating a cold or warming slab causes pinholes and bubbles, which means a sand-back and recoat.
• Promising the customer they can park tomorrow. Vehicle traffic too early ruins the cure and leaves tyre marks and indentations.
• No slip-resistance consideration. A glossy epoxy can be slippery when wet; flake or an anti-slip additive should be discussed and priced.

Frequently Asked Questions

How much does an epoxy garage floor cost in the UK?

Most domestic garage floors cost £40–£90/m² installed, with typical jobs around £55–£70/m². A single garage (15–18m²) is roughly £700–£1,400 and a double (30–36m²) roughly £1,400–£2,800, depending on the system, the number of coats and how much preparation the slab needs. Prep and moisture management are the variables that move the price most.

Epoxy or polyaspartic — which is better?

They're often used together. Epoxy gives a strong, high-build, well-bonded basecoat at a lower cost. Polyaspartic is a fast-curing, UV-stable topcoat that resists yellowing and abrasion and lets you return the floor to use sooner — but it costs more. A common premium spec is an epoxy basecoat with a polyaspartic seal. Pure epoxy is fine for many domestic garages and keeps the price down.

Why do I need to test the slab for moisture?

Because moisture rising through the concrete is the main reason epoxy floors fail. An epoxy film is largely impermeable, so vapour pressure under it builds and lifts the coating off in blisters or delaminates it entirely. A relative-humidity probe test (or calcium chloride test) before you coat tells you whether the slab is dry enough or whether a moisture-suppression primer is needed. It's cheap insurance against an expensive redo.

How long before I can park on it?

Foot traffic is usually fine after 24–48 hours, but you should keep vehicles off for about 7 days while the coating reaches full chemical cure. Parking too early causes tyre marks, indentations and premature wear. Cooler temperatures lengthen these windows, so winter jobs in an unheated garage take longer.

Can epoxy be laid in winter?

Yes, but with care. Most epoxies need the slab above about 10°C and cure slowly when cold, which extends recoat windows. A warming slab can also outgas and cause pinholes. In an unheated winter garage you'll often need to introduce controlled heat and allow for longer cure times — both of which should be priced into the quote.

Regulations & Standards

• COSHH (Control of Substances Hazardous to Health Regulations 2002) — resins, hardeners and solvents are hazardous substances. Carry out a COSHH assessment, follow the product safety data sheets, provide ventilation and the correct PPE (gloves, eye protection, respiratory protection for solvent systems), and control dust from grinding.
• HSE guidance on respirable crystalline silica (RCS) — diamond grinding and shot blasting of concrete generate silica dust. Use on-tool extraction (LEV) or water suppression and appropriate RPE; this is a recognised HSE health priority.
• Manufacturer technical data sheets (TDS) and safety data sheets (SDS) — these are the binding reference for moisture limits, slab temperature, recoat windows, coverage rates and mixing ratios. Always work to the specific product's TDS, not a generic figure.
• Slip resistance — there is no specific legal limit for a domestic garage, but for any floor where slip risk matters the recognised UK measure is the pendulum test value (PTV). Consider an anti-slip additive or flake finish where the floor may get wet.
• VOC content — solvent-based systems carry higher VOC; check the SDS and provide ventilation. Lower-VOC water-based and solids systems reduce this risk.

This article does not cite a specific British Standard for domestic garage epoxy coatings because the work is governed primarily by COSHH, general health-and-safety duties and the manufacturer's data sheets rather than a single product standard. Where a specific standard or threshold matters for your job, verify it against current HSE guidance and the product TDS.

• COSHH – Control of Substances Hazardous to Health (HSE) — legal duties for working with resins, solvents and hazardous substances.
• Construction dust / silica (HSE) — controlling respirable crystalline silica from grinding and blasting.
• Personal protective equipment (PPE) at work (HSE) — PPE and RPE requirements for resin and dust work.
• VAT on building work and refurbishment (GOV.UK / VAT Notice 708) — standard-rating of domestic refurbishment work.