How to lay resin bound paving

Inspired by a thorough UK installation guide. This walk-through draws on the comprehensive video “How to Lay Resin Bound Paving | A-Z GUIDE | Complete Transformation” from the Resin Bound Pro channel, which takes the viewer through the entire process from base assessment to finished surface. The sections on mixing ratios and screeding technique are particularly clear — well worth watching in full before you order materials.

1. Assess and prepare the existing surface

Resin bound paving can be laid over an existing tarmac or concrete base if the base is sound, level, and well bonded. Any loose, crumbling, or cracked sections need to be repaired first. A base that moves will cause the resin surface above it to crack, and there is no fixing that without stripping the whole lot back.

If the existing base is failing or not permeable enough, a new SuDS-compliant base will be needed: typically 150 mm of compacted Type 3 or Type 1 sub-base topped with a 30 mm permeable tarmac or open-textured macadam layer. This is the correct long-term approach and the one used by professional installers.

2. Fit edging restraints and expansion profiles

Resin bound paving is a continuous, seamless surface, which means the edges need to be contained properly. Aluminium or steel edging strips are fixed around the perimeter and at any changes of material. They keep the resin mix from spreading at the edges and give the finished surface a clean, professional boundary.

Expansion joints are also important over longer runs. Resin bound material moves slightly with temperature, and a joint every 5–8 metres allows for this without cracking. The joints are filled with a UV-stable flexible sealant in a matching colour.

3. Clean the base thoroughly

The base must be completely clean, dry, and free from grease, moss, algae, or loose material before the resin goes down. Pressure wash it, allow it to dry fully, and treat any organic growth with a biocide if needed. Even a damp patch will prevent adhesion — resin does not bond to moisture.

Pay particular attention to any previously painted or sealed areas. Paint needs to be mechanically removed or the resin will peel away with it. This is worth checking before you commit to laying over an existing surface rather than starting from scratch.

4. Mix the resin and aggregate

Resin bound mixes come in two parts: Part A (resin) and Part B (hardener). These are combined in exact proportions and then mixed with the dried aggregate in a forced-action (paddle) mixer. Never use a drum mixer — it does not give the thorough coverage needed and will leave uncoated stones in the mix.

The mixing ratio and working time vary by product and by temperature. In warm weather the resin sets faster, so you have less time to work. In cold weather (below 5°C) many resins will not cure correctly. Check the product data sheet and plan accordingly. This is genuinely not a job for a very hot day or a frosty one.

5. Pour and screed the mix

Work in bays, pouring the mixed resin aggregate onto the prepared base and spreading it with a hand or power float to an even thickness — typically 15–18 mm for driveways and 12–15 mm for paths and patios. The mix is self-levelling to an extent, but screeding it out correctly ensures consistent depth and a flat, even surface.

Work quickly but methodically. Resin bound material has a working time of around 20–30 minutes depending on the product and conditions, so each bay needs to be mixed, poured, and screeded before the previous one begins to cure. This is a two or three-person job on anything larger than a small path.

6. Trowel and finish the surface

Once screeded to depth, the surface is trowelled to compact and close the mix slightly. A steel or plastic float worked in circular motions gives a smooth, uniform finish. The aggregate stones should be fully coated with resin and sitting flush in the surface — any stones that are lifting or uncoated indicate insufficient resin or inadequate mixing.

At the edges, use a smaller trowel to press the mix firmly into the edging profiles. A clean edge here makes a huge difference to the final appearance. Run a brush along the edging afterwards to tidy any marks.

7. Allow to cure before use

Most resin bound mixes reach initial cure within 2–4 hours and are walkable within 4–6 hours. Full vehicle load should wait 24–48 hours. Do not allow heavy vehicles onto a fresh surface prematurely — wheel ruts are difficult to repair neatly and usually need resurfacing.

Keep pets and children off until the surface is fully cured. Resin in its uncured state is not something you want tracked through the house.

When to call a handyman

A small resin bound path or patio is within reach of an experienced DIYer who has the right equipment. Anything involving a full driveway, drainage design, or a new permeable base layer is genuinely best handled by a specialist. Call Richard if you are not sure about the existing base condition, if you need help with the edging or groundworks, or if the job simply needs doing properly first time.