How the two differ in kind
Gravel is less a surface than a maintained state. It goes down cheap, drains through itself, laughs at frost, and any pothole is fixed by the owner with a shovel in ten minutes. In exchange it migrates — into the lawn, down the slope, out of the wheel tracks — grows weeds wherever organic dust settles into it, and gets plowed only by someone with a careful blade height.
Asphalt is a committed structure: a compacted base under machine-laid hot mix, edges that need support, and a schedule — sealing on a cycle, crack-filling before water gets under, and eventually an overlay. In exchange you get a clean surface for bikes and shoes, effortless snow clearing, and no migration. Its enemy is water under the mat: a poor base or an unfilled crack in freeze-thaw country turns into alligatored patches faster than any brochure admits.
Length changes the answer. A short suburban drive amortises asphalt's fixed costs badly and gravel's containment problem is small. A long rural drive flips both: asphalt's cost per metre marches on relentlessly, while gravel's occasional grading is what tractors are for.
The factors that actually differ
Show
| Gravel | Asphalt | |
|---|---|---|
| Repair | Owner-fixable with a shovel, forever. | Crack-fill and patch on a schedule; big failures mean a contractor. |
| Drainage | Drains through itself; puddles mean the base needs grading, not the surface. | Sheds water — which must be given somewhere to go, or it finds the edges. |
| Snow and ice | Ploughing skims gravel into the yard; know your blade height. | The plough-and-shovel surface, no contest. |
| Freeze-thaw | Indifferent — it already moves. | Water in cracks is the mortal enemy; discipline with the crack filler decides its life. |
| Slopes | Washes downhill; steep runs need containment or a different surface. | Holds any drivable grade. |
| Kerb feel | Rural, informal, crunchy. | Suburban, finished, quiet. |
| Where the water goes | Through it, mostly, which removes the drive from the drainage problem and avoids the consent that a new impermeable surface increasingly needs. | Off it, to wherever the falls send it — which has to be somewhere legitimate. |
| Migration | Moves. Under turning wheels, downhill, and into the road at the entrance. Edge restraint is mandatory and a stabilising grid is what stops it properly. | Stays where it was laid. |
| Clearing snow | A plough blade lifts the surface with the snow. Shovelling is the practical method, and the gravel ends up on the lawn. | Clears cleanly with anything. |
| Sound | Audible, which some people install it for — nobody arrives unannounced. | Silent. |
| Weeds | A continuous low-level task. A geotextile beneath helps a great deal; a stabilising grid with cells helps more. | Only at the edges and in cracks. |
| Repair | Raked and topped up. There is no such thing as a visible patch. | Patched, and the patch shows permanently in colour and texture. |
Which one, and when
Choose gravel when…
- Long runs where paving cost per metre is decisive.
- DIY maintenance culture — you would rather rake quarterly than schedule contractors.
- Freeze-thaw ground that eats rigid surfaces.
Choose asphalt when…
- Snow country with a plough or blower doing the mornings.
- Slopes gravel would abandon.
- The clean threshold: bikes, prams, shoes and the house's first impression.
Now run your own numbers
This page holds no prices on purpose — a national average is wrong for almost every real project. Quantify both options with your dimensions and your local quotes.
Frequently asked questions
- Does gravel really need topping up?
- Yes, on a cycle measured in years — it migrates, compacts into the base and disappears into mud in soft spots. The honest budget for gravel is not zero maintenance but CHEAP maintenance: a delivery every few years and grading in between. Budget the top-up, not the fantasy.
- Can I asphalt over my gravel drive?
- Sometimes — the existing gravel can become part of the base if it is deep, clean and compacted, which is exactly what a paving contractor will assess. Thin, muddy or organic-contaminated gravel gets excavated anyway. Either way asphalt's life is decided by that base, so this is the wrong corner to cut.
- What actually kills asphalt drives?
- Water under the mat, almost every time. A crack goes unfilled, water gets beneath, freeze-thaw pumps it, the base softens and the surface alligators over the failure. Sealing is cosmetic-plus-protective; CRACK FILLING is the life-extender. Ten minutes with filler in autumn beats a patch crew in spring.
- Why does my gravel keep migrating?
- Three reasons, usually together. The stone is the wrong shape: rounded pea gravel behaves like ball bearings and rolls, while angular crushed stone in the ten-to-twenty millimetre range interlocks and stays put. There is no edge restraint, so the gravel spreads sideways until it finds one — which is often the lawn or the road. And the layer is too deep: a thick loose layer of gravel is a fluid that vehicles swim through, whereas a thinner surface layer over a compacted sub-base is a surface. The proper fix for a drive that must not migrate is a cellular stabilising grid laid over the sub-base and filled with angular stone, which mechanically prevents the movement rather than discouraging it.
- Does a gravel drive need a sub-base?
- Yes, and the omission is why most disappointing gravel drives disappoint. Gravel is a surfacing, not a pavement: the structural layer is a compacted granular sub-base beneath it, and without one the vehicle loads go straight into the subgrade, which deforms and produces the ruts and hollows that the gravel then fills unevenly. A geotextile separator beneath the sub-base stops fines from the ground pumping up into it, which is what destroys a granular layer over time without anything visibly happening. Spreading gravel over topsoil is not a drive; it is gravel on a garden, and it will behave accordingly within a season.
- Can I plough a gravel drive?
- Not with a blade set to the surface, because it lifts the gravel and deposits it wherever the snow goes. The workable approaches are a blade with skid shoes set to leave a layer of snow behind, a plough with a rubber or polyurethane edge, or a blower set high. All of them leave more snow than they would on a hard surface. If the drive is long, in a climate with regular heavy snow, and has to be cleared by machine, that is a real argument for a bound surface — and it is the practical consideration that most often overrides the drainage advantages of gravel.
- Which costs less over ten years?
- Gravel is markedly cheaper to build and needs a little attention every year — topping up, raking, weeding, and eventually a fresh surface layer. Asphalt costs more to build and needs nothing for years, then a seal or an overlay. The comparison usually turns on two things that are not the surface at all: whether the asphalt option needs drainage and a consent, which can be a substantial addition, and how the drive is used. A short domestic drive with light use favours gravel comfortably. A long drive with heavy vehicles, turning, and snow clearing by machine erodes gravel's advantage quickly, because each of those is a maintenance event rather than a one-off.