Knowing exactly how much resin you need per square metre is essential for creating durable, long-lasting resin floors—whether for driveways, patios, or decorative indoor spaces. This guide compares the most suitable floor resins for different substrates and explains the key differences between resin types, helping homeowners, installers, and project managers order the right amount for effective coverage and outstanding results.

Calculating Resin Quantities Per Square Metre: An Overview

The quantity of resin required per square metre of flooring hinges on several factors: surface type (concrete, pebble, or aggregate), targeted thickness, and whether you are installing a new permeable layer or sealing an existing one. Epoxy, polyurethane, and methacrylic resins all have specific consumption rates designed for their respective use cases. For pebble floors, the blend ratio of resin to aggregate is crucial, while for coatings or sealers, light application is often sufficient. Below, you’ll find a summary of what to expect for common flooring projects, including the exact products designed for each scenario.

Visualising Coverage: How Much Resin and Pebble Per m²

To achieve an even, robust floor, consider both the amount of resin and the type of aggregate. For pebble or grit surfaces, a typical ratio is around 10 kg of aggregate to every 1 kg of resin per square metre at 20 mm thickness. For concrete sealers or primers, usage is often far lower—between 40–300 grams per m², depending on absorption and layering. Always refer to individual product guidance to avoid over- or under-ordering and to ensure durable results.

“Flowstone” – Complete Permeable Floor Kit with Pebbles and Resin

If you are planning an outdoor permeable surface, the “Flowstone” – Complete Permeable Floor Kit with Pebbles and Resin combines the right quantities of washed, dried pebbles and resin for each square metre. The kit is supplied with full instructions and clear guidance on which binder to use:

• Non-yellowing polyurethane is recommended for white pebbles to preserve their bright appearance.
• Low-yellowing epoxy, like the “Trasparente” binder below, works with coloured aggregates for stability and lasting results.

As a practical example, for a typical installation at 20 mm thickness, you will need around 9–10 kg of dry aggregate plus approximately 1 kg of binder resin per square metre. The kit takes the guesswork out of ordering and is designed for driveways, footpaths, patios, and similar British climate settings. Find details in our Pebble Floors category.

“Trasparente” – Epoxy Binder for Coloured Pebbles and Grits

For vibrant, coloured, or dark aggregates in decorative flooring, the “Trasparente” – Epoxy Binder for Coloured Pebbles and Grits is tailored to provide maximum clarity and UV resistance. It is especially suited for custom blends where clarity and colour stability are priorities. For a standard 1.44 m² area at 20 mm thickness, you typically require about 432 kg aggregate plus 13 kg of binder—this equates to nearly 9 kg aggregate and 0.9 kg resin per square metre. The binder’s low viscosity ensures even coverage and structural strength throughout the floor.

“Resinstone” – One-Component Methacrylic Resin for Concrete Floors and Driveways

If your project involves sealing and protecting concrete, the “Resinstone” – One-Component Methacrylic Resin for Concrete Floors and Driveways delivers deep penetration and superior waterproofing. The theoretical resin consumption ranges from 40–60 grams per square metre, depending on how porous the surface is. One can easily cover large garage, yard, or outdoor areas with minimal material wastage. This resin is designed to protect against moisture, de-icing salts, and chemicals—making it ideal for high-traffic residential and commercial floors.

“Epoxyprimer” – Universal Water-Based Two-Component Epoxy Floor Primer

No matter which resin finish you choose, proper priming is key for adhesion and durability. The “Epoxyprimer” – Universal Water-Based Two-Component Epoxy Floor Primer is suitable for concrete, timber, tiles, and screed. Its coverage ranges from 100–300 g per square metre, based on the absorbency and texture of the substrate. Consistent substrate preparation helps avoid uneven coating and ensures a professional, long-lasting outcome.

Application Tips and Surface Considerations

The best resin system and precise material quantities depend on your intended finish, the base surface, and whether water drainage or colour stability is necessary. Always check the recommended consumption for both the resin and the aggregate or substrate. Surface porosity and temperature can affect coverage and resin flow. For pebble floors, using a cement mixer on large projects saves time and ensures uniform mixing; on smaller jobs, thorough hand-mixing works well. Always follow instructions supplied with each product for curing times, weather suitability (generally 10–40°C), and safety precautions.

Pro Tips for Estimating and Applying Resin

Measure your floor accurately, factor in surface texture, and mix thoroughly for a consistent finish. For best coverage and performance, prepare your floor carefully before resin application, and use the recommended mixing ratio for resin and aggregate. Ambient temperature and humidity can also influence curing and finish quality, so plan your installation for mild, dry conditions when possible.