Looking after a long gravel driveway, dust, grading and drainage

March 7, 2025

Looking after a long gravel driveway

A long drive is one of the good things about living out of town and it is also a piece of infrastructure you own, which is a fact that only really lands the first winter when it turns into a creek. The three things that go wrong are dust, potholes and water, and the third one causes most of the second.

Dust

Some dust is the price of admission. Excessive dust is a different thing, because it coats the house, it hangs in the air behind every vehicle, and it means the fines that hold your surface together are blowing away rather than staying put.

Watering settles it for a few hours and that is all, so it is a fix for the day the visitors come rather than a strategy.
A properly compacted layer of gravel or road base is the real answer, because a compacted surface has far less loose material on top of it to lift.
Planting along the edges helps more than people expect. A line of shrubs slows the wind across the drive and catches a good deal of what does lift.
Driving slower makes a bigger difference than anything on this list and costs nothing.

Grading and potholes

Ruts and potholes turn up wherever water sits, and once one starts it grows every time a wheel hits it, because the water gets in and the wheel pushes it out again.

Keep a crown on it. The centre wants to be slightly higher than the edges so water runs off sideways instead of running down the middle. This is the single most useful thing on the whole page and it is the thing most drives are missing.
Fill properly. Tipping loose gravel into a hole and driving over it puts the hole back within a fortnight. Clean the hole out, fill it with a mix of coarse and fine material so it locks together, and compact it.
Grade little and often. A box blade or a grader attachment behind a tractor, run over the whole drive occasionally, keeps it flat. Waiting until it is bad turns a half hour job into a weekend.
Grade when it is slightly damp. Bone dry gravel will not knit together and sodden gravel just smears.

Drainage, which is the actual problem

Water is what wrecks a driveway, and everything above is really about getting water off it and away from it.

Check the fall. Water should be leaving the drive rather than sitting on it or running along it, and a long run with no escape point will scour itself out.
Keep the table drains clear. Side ditches fill with silt and grass over a couple of seasons and stop doing anything, and clearing them is a much smaller job than repairing what happens when they do not work.
Culverts where the drive crosses a low point, sized for the water that actually comes through rather than the water you would like to come through.
A decent base underneath. A drive built on layers that drain will shed water. One built on clay with gravel tipped on top of it will hold water under the surface and go soft from below.

The habit that saves the money

Do the small jobs before the wet. Clear the drains, fill the holes, put the crown back. A drive that goes into winter in good order comes out of it in reasonable order. A drive that goes in with three potholes and a blocked table drain comes out needing a truckload of gravel.

Shop related products

Brunnings Glyphosate 360 Weed Killer 1L. For the drive edges and the table drains, where grass narrows the run.
Adbri General Purpose Concrete Mix 20kg. For culvert ends, grate surrounds and anything that needs to stay put.
AdBri Speedset Cement 30kg. Sets fast with no mixing, which suits post holes and small repairs.
Adbri Premium Cement 20kg. For when you are batching your own rather than using a premixed bag.
Adbri Mortar Mix 20kg. For brickwork on retaining and drainage structures.

Cement is heavy and a driveway job is never one bag, so we deliver Tuesdays and Thursdays on anything bought from us, $5 around Strathalbyn and $10 on the regional run out through Langhorne Creek, Wistow, Woodchester, Tooperang and the rest. Local delivery. We also do special orders on roofing, flashings, polycarb and steel mesh, so if you need something for a drainage job that is not on the shelf, ring us on (08) 8536 4333 and we will find it. There is more in the building materials range and the plumbing range online.

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