Do You Need Landscape Fabric Under Gravel?
When fabric under gravel helps, when it does not, the difference between woven and non-woven fabric, and how to lay it.
Landscape fabric under gravel is one of the most argued-over questions in yard work. The honest answer: it depends on what you want the fabric to do. It’s very good at one job and disappointing at another.
What fabric does well: keeping gravel out of the soil
Over time, stones get pushed down into the soil and soil gets pushed up into the stones. On paths and driveways, this mixing makes the gravel “disappear” and turns the surface muddy. A layer of fabric keeps the two apart, so the gravel stays where you put it and you top it up less often.
Use fabric for: driveways, parking pads, paths and patios, especially on clay or soft soil, and under the gravel in French drains and dry creek beds.
What fabric does badly: stopping weeds long-term
Fabric stops weeds growing up from below. But leaves, dust and seeds collect in the gravel on top, and weeds grow in that. Their roots then grow into the fabric itself, making them harder to pull.
Extension gardeners are blunt about this. In one Ask Extension answer, Colorado Master Gardeners note that research shows fabric is “not an effective weed barrier after about the first year,” and that weeds rooting into it are harder to remove.
For weeds, what works better: a deep enough layer of gravel (2–3” on paths), edging so soil doesn’t creep in, clearing leaves before they break down, and pulling weeds while they’re small.
Woven or non-woven?
- Woven fabric (looks like a flat plastic tarp weave): strong and stable. Best under driveways and anywhere that carries vehicles.
- Non-woven fabric (looks like felt): lets water through freely and filters fine soil. Best for drainage jobs such as French drains and around pipes.
- Thin “weed block” from garden centers: fine under decorative stone in beds, but too weak for driveways and tears easily.
Where to skip it
- Around plants you want to grow and spread, or where you’ll add compost later.
- Under organic mulch such as bark or wood chips; mulch breaks down on top of it and weeds root there anyway.
- On firm, sandy, well-drained ground under a decorative path, where mixing is slow.
How much fabric you need
Area plus about 10% for overlaps:
| Area | Fabric |
|---|---|
| 3 × 30 ft | 99 sq ft |
| 4 × 50 ft | 220 sq ft |
| 10 × 10 ft | 110 sq ft |
| 12 × 20 ft | 264 sq ft |
| 10 × 50 ft | 550 sq ft |
Laying it properly
- Clear weeds and roots, then grade and compact the soil.
- Roll the fabric out flat, overlapping seams by at least 12”.
- Pin it with landscape staples every few feet and along the seams.
- Turn the edges up against the edging, or tuck them down beside it.
- Spread the gravel gently from one end; don’t drive or drag tools over bare fabric.
The Gravel & Stone Planner adds fabric to your stone order if you tick the fabric option.