A Self-Binding Gravel Driveway Only Works With One Grade

Key Takeaways

• A self-binding gravel driveway is not for everyone. The car tyres shear the bound top where they turn, the fines turn muddy in rain and the surface needs regular maintenance.
• Golconda is the only self-binding gravel Outdoor Aggregates recommends for a driveway, laid 100 to 150mm deep in 50mm layers over 150mm of compacted MOT Type 1.
• Self-binding gravel is nearly impermeable, not free-draining. A drive needs a cross-fall of about 1 in 40 so rain runs off to a lawn or border.
• Nothing goes between the self-binding gravel and the sub-base. The membrane sits under the MOT Type 1 base, with a 300mm overlap, pinned every 1m.
• A new self-binding drive must be kept clear of cars for a week in summer and two weeks or more in cold, wet weather, then driven gently for three months.
• Grit from self-binding gravel sticks to shoes and tyres while the surface is new. A paved strip at the door helps keep it out of the house.

Nearly every week when I was laying drives, someone asked me for the surface they had seen at a National Trust car park. Firm, natural, no loose stone scattering onto the road. They wanted it on a front drive, before I explained what a car does to it.

I rate self-binding gravel on paths and courtyards. On a drive, the surface is held together by nothing but compacted stone dust. A tyre rolling straight over it is fine. A tyre turning on it, or spinning on a wet morning, tears the top loose, and then the rain gets in. If you want one for the style or don’t mind the added work, this page discusses the best way to manage one, with the only grade of ours I would put a car on.

What Goes Wrong With Self-Binding Gravel on a Driveway?

A self-binding gravel driveway fails in four ways: tyres shear the surface where cars turn, the fines turn muddy in rain, grit walks indoors, and potholes return if the base is weak. And this goes for cars only. A van that comes and goes every day, a lorry, or anything with a trailer will cut it up worse.

The fines (the stone dust that binds the gravel) are the whole point of the material and also its weakness. Dry and compacted, they lock the stone into one firm layer. Wet, they soften. Turn the steering wheel while the car is standing still and the tyre twists that soft top loose. The loose patch holds water, the water softens the next layer down, and you have a pothole by spring.

The grit is the other thing people asked me about. Golconda is 0 to 10mm, and the small end sticks in shoe treads and tyre grooves while the surface is new. It ends up in the hall and the car footwells, and eases as the surface weathers.

One contrast is worth making. The most-read drive question online is a car stuck in loose gravel laid too deep. Self-binding gravel has the opposite problem: it holds a car fine, it just cannot take the car turning.

Which Self-Binding Gravel Works on a Drive?

Golconda is the only self-binding gravel I recommend for a driveway. It is a 0 to 10mm crushed dolomitic limestone, and it is the drive grade in the Outdoor Aggregates range. Golden and Red are path grades. The three look alike in the bag. The difference is what the quarry grades them for. Golden and Red take the odd car, but on a drive they go muddy sooner and need more upkeep.

The branded alternative most people have heard of is Breedon Golden Amber, the buff stone on the Crown estates and half the National Trust. It is a good product, listed at £195 plus VAT for a bag of about 800kg, ex delivery. Golconda from Outdoor Aggregates is £158 for an 850kg bulk bag and does the same job. Golconda Self-Binding Gravel is in the shop, and the self-binding gravel range page sets all three side by side.

Self-Binding, Loose Gravel or Resin for a Drive?

Loose angular gravel is the drive surface I recommend for most homes. Self-binding gravel suits a straight drive where no car turns. Resin bound is the firm option, at a price. Loose gravel wins because it has no bound top to tear. A tyre turns on it and the stone shuffles and settles back.

Loose gravel at twice the stone size, so 20mm stone at 40mm, over 150mm of MOT Type 1 is the build I used on most front drives, and the gravel driveway how-to walks through it. Under 14mm is not recommended for the best performance, as it can get stuck in your tyres, but it is completely down to personal taste and preferences. Our driveway gravel category holds the 10 to 20mm angular stones.

Resin bound behaves like tarmac with a gravel face. As a DIY job it is a kit laid 18mm deep over sound concrete or tarmac with no cracks or movement; on a new drive it is a specialist job. Our resin bound gravel kits page covers what the kit route can do.

So where does self-binding fit? A straight drive to a garage, cars rolling in and out, nobody three-point turning on it. A drive where every car swings round to face the road does not work, unless the turning spot is paved and the Golconda runs up to it. Of course, some people just love the look with their country garden, and that is an issue of taste I can’t argue with.

How Is a Self-Binding Gravel Drive Built?

A self-binding gravel drive is built as membrane, 150mm of compacted MOT Type 1, then 100 to 150mm of Golconda laid in 50mm layers, with a 1 in 40 cross-fall and a firm edge.

The mistake I corrected most often on other people’s drives was a membrane laid on top of the sub-base, under the self-binding gravel. It feels right, because that is where it goes on a loose gravel path. Here it stops the fines keying into the stone below, and the whole top floats on a sheet of plastic. Nothing goes between the Golconda and the MOT Type 1.

Dig out about 250 to 300mm and take out any soft spots. Lay the membrane on the dug ground. Our Heavy Duty Weed Membrane is the woven sheet for this. Then 150mm of MOT Type 1, compacted until the plate stops making a difference. Our sub-base how-to covers the dig and the compaction in full.

Now the Golconda. Spread the first layer about 75mm loose with the back of a rake or a straight board, never a tined rake, because the tines separate the dust from the stone and you lose the bind. Damp it, compact it to about 50mm, then repeat. Two layers gives 100mm; three gives 150mm for soft ground or a busier drive. Set the surface to fall about 1 in 40 across its width, a 25mm drop for every metre, so rain runs off to a lawn or border. Water standing on it is what softens it into potholes. Keep the steepest run under about 1 in 15.

Fit the edge before the gravel goes down. On a path an edge helps it compact. On a drive I would always fit one, level with the finished surface or with gaps along it, so rain can still get off the side.

Then leave it alone. No cars for a week in summer, two weeks or more when it is cold and wet. For the first three months drive on it gently: no spinning wheels, no turning the steering while stopped. It keeps hardening the whole of that time.

How Much Golconda Does a Driveway Need?

A 5m by 4m self-binding gravel drive at 100mm finished takes about 4.4 tonnes of Golconda with 10% spare, which is six 850kg bulk bags. A tonne of Golconda covers about 10m² at 50mm finished, so about 5m² at 100mm, and the compaction is already in that figure. An 850kg bag covers about 8.5m² at 50mm and about 4.25m² at 100mm. Work the tonnes from the finished depth and add 10% for dips and spills.

Our Driveway Cost Calculator works out the Golconda, the MOT Type 1, the membrane and the pins in one go, with the shop price for the lot. Pick “Self-binding gravel” as the surface.

Does a Self-Binding Gravel Drive Need Planning Permission?

A self-binding gravel driveway over 5m² is best treated as an impermeable surface, so run its fall onto a lawn or border, or check with your council before you build it.

The rule in England is simple on paper. A new front drive of any size needs no permission if water drains through it, and gravel is named as that kind of surface. A drive over 5m² that water runs off needs permission, unless the run-off goes to a lawn or border. Self-binding gravel is never named in the guidance, and a compacted self-binding surface sheds nearly all of its rain. In my view it sits on the impermeable side of the line, so the safe build is a 1 in 40 fall to a planted edge. The Planning Portal sets out the rule; Wales has its own. A new dropped kerb needs the council’s say-so whatever the surface.

Ruts, Potholes and Mud: Fixing a Self-Binding Drive

A rut in a self-binding gravel drive is raked back, dampened and re-compacted. A pothole is cut out square to the sub-base and refilled with fresh Golconda. Most of the wear lands in two lines where the wheels run. When they sit lower than the rest, rake the loose top back in, damp it and run the plate over it. Do that in spring and it stays a rake job. Leave it and the dip holds water, and the water does the rest.

Whatever the repair, the new stone has to be damp when you compact it, and it has to be the same stone. Loose 20mm gravel never binds to the Golconda round it.

Is Hoggin the Same as Self-Binding Gravel?

Hoggin is not the same as self-binding gravel, though it does the same job. Hoggin is a natural mix of clay, sand and gravel dug in south-east England, and the clay makes it sticky and claggy in wet weather.

Self-binding gravel is crushed quarry stone with its own dust left in, so it binds on stone dust alone. Hoggin binds on clay, and clay holds water, which on a drive with a car turning on it is worse than a nuisance. If you have been quoted a “hoggin driveway”, ask what is in the mix. If it is crushed limestone to dust, it is a self-binding gravel by another name, and the advice above applies.

Next Steps

We stock everything for a self-binding gravel drive built the way I have set out: Golconda for the surface, MOT Type 1 for the base, and the woven heavy duty weed membrane with pins to go under it. If you have decided on loose gravel instead, which is the call I would make on most drives, we stock 21 driveway gravels in the 10 to 20mm sizes. Put your measurements into the Driveway Cost Calculator to find out exactly how much you need and get an instant price estimate, or get in contact and we will check the numbers with you.

If you would rather talk your self-binding gravel driveway through with a person, call Outdoor Aggregates on 0330 043 7585. The office is open 7am to 7pm, seven days a week.

Have you ever laid self-binding gravel where a car drives over it? Which grade did you use, and how has the top held up where the wheels turn? Let us know in the comments.

FAQs

Is self binding gravel suitable for driveways?

Self binding gravel is not generally suitable for a driveway, because tyres shear the bound top where cars turn and the fines turn muddy in rain. Golconda is the one grade I would lay on a drive, and only where cars drive straight in and out.

Which self binding gravel is best for a driveway?

Golconda is the best self binding gravel for a driveway, and the only one Outdoor Aggregates recommends for one. It is a 0 to 10mm dolomitic limestone laid 100 to 150mm deep in 50mm layers. Golden and Red are path grades.

How deep should self binding gravel be on a drive?

Self binding gravel on a drive is laid 100 to 150mm deep once compacted, in layers of 50mm, over a 150mm MOT Type 1 sub-base. Each layer goes down about 75mm loose and the compactor takes it to 50mm.

Does self binding gravel drain through?

Self binding gravel does not drain through once compacted, so a drive needs a cross-fall of about 1 in 40 to shed rain to a lawn or border. Water left standing on it softens the surface into potholes.

Is hoggin the same as self binding gravel?

Hoggin is not the same as self binding gravel. Hoggin is a natural clay, sand and gravel mix from south-east England that binds on its clay, which goes sticky in the wet. Self binding gravel is crushed stone that binds on its own dust.