What gravel goes in permeable paver joints?

Washed angular grit, typically 2–5 mm for standard blocks and 2–6 mm for wider joints. It must be free of fines so the joint stays permeable.

Can I use kiln-dried sand instead?

Not for permeable paving. Kiln-dried sand is for conventional block paving; in a permeable system it blocks infiltration and defeats the design.

How much jointing grit per square metre?

Around 4–6 kg per square metre depending on joint width and block depth, plus ten to fifteen per cent for topping up after settlement.

Do you supply the bedding layer too?

Yes, and it is worth ordering together — the bedding course should be the same clean angular family as the joint so water is not trapped at the interface.

Will the joints need refilling later?

Some settlement is normal in the first weeks of use. Brushing in additional grit once traffic has consolidated the joints is standard practice.

Is it washed before packing?

Yes. Every batch for this use is washed and screened to remove fines, because fines are the main cause of permeable paving losing its infiltration rate.

Paver Jointing Gravel and Bedding Grit

Permeable paving fails at the joint before it fails anywhere else. The jointing material has to be angular enough to lock, clean enough to drain and graded tightly enough that it does not wash out under rainfall. That is a screening job, and it is where most supply falls short.

Washed 2–6 mm angular grit that locks in the joint
Free of fines so joints stay permeable
Matched bedding course available on the same order
Bulk bags sized for typical driveway areas

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Fine angular jointing gravel being brushed into permeable paver joints

Available sizes

1–3 mm
2–5 mm
2–6 mm
4–8 mm bedding

Applications

Permeable block paving joints
Bedding course beneath permeable pavers
Setts and cobble joint filling
Porous car park and drive surfaces
SuDS-compliant hard landscaping

Typical buyers

Paving contractors
Builders merchants
Civil contractors
Distributors

Why angular, washed grit is specified

Rounded sand rolls and migrates; angular grit interlocks and stays in the joint. Fines are the other failure mode — they blind the joint so surface water sheets off instead of infiltrating, which defeats the point of permeable paving and can breach a drainage consent.

Joint width and grit size

Narrow joints on standard permeable blocks take 2–5 mm; wider joints on setts and larger units take 2–6 mm or 4–8 mm. Undersized grit washes out in the first heavy rain; oversized grit bridges the joint and leaves voids beneath.

Bedding course consistency

The bedding layer directly under the pavers should use the same clean, angular material family as the joint. Mixing a fine-bearing bedding sand under a permeable joint is a common site error and traps water at the interface.

Topping up after settlement

Joints settle over the first few weeks of traffic and need brushing up. Contractors normally allow ten to fifteen per cent extra material for that, and merchants who stock the topping grade get repeat business from the same job.

Quantities and packing

A typical permeable driveway uses roughly 4–6 kg of jointing grit per square metre depending on joint width, plus the bedding course at stated depth. Jumbo bags suit site work; 20–25 kg bags suit merchant resale.

Wholesale, bulk and export details

This product is supplied on the same commercial basis as the rest of our range: quantity confirmed against container payload, packing quoted separately and documentation prepared to your broker's brief.

Questions buyers ask about paver jointing gravel

What gravel goes in permeable paver joints?: Washed angular grit, typically 2–5 mm for standard blocks and 2–6 mm for wider joints. It must be free of fines so the joint stays permeable.
Can I use kiln-dried sand instead?: Not for permeable paving. Kiln-dried sand is for conventional block paving; in a permeable system it blocks infiltration and defeats the design.
How much jointing grit per square metre?: Around 4–6 kg per square metre depending on joint width and block depth, plus ten to fifteen per cent for topping up after settlement.
Do you supply the bedding layer too?: Yes, and it is worth ordering together — the bedding course should be the same clean angular family as the joint so water is not trapped at the interface.
Will the joints need refilling later?: Some settlement is normal in the first weeks of use. Brushing in additional grit once traffic has consolidated the joints is standard practice.
Is it washed before packing?: Yes. Every batch for this use is washed and screened to remove fines, because fines are the main cause of permeable paving losing its infiltration rate.

Where we ship paver jointing gravel

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