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How to lay weed membrane

Updated: 22 October 2026

You are covering a border or an allotment bed, and the roll is either in the shed or still in the basket. How to lay weed membrane is the order of work: clear what is already growing, overlap the joins, peg the edges, and cover the sheet before the sun works on bare polypropylene. The fabric blocks light where it lies flat. It leaves bindweed and couch that stay in the soil, and seed that lands in the mulch can still grow. Which roll to buy, including grams per square metre, sits on our [ground cover](/hub/garden-supplies/ground-cover) comparison. A qualifying purchase can earn us a commission at no extra cost to you.

You are covering a border or an allotment bed, and the roll is either in the shed or still in the basket.

Our top picks

VOUNOT VOUNOT weed membrane, 2 m × 10 m, 30 pegs

Best overall

VOUNOT VOUNOT weed membrane, 2 m × 10 m, 30 pegs
8.5/10about £11.90
View offer
ANSIO ANSIO weed membrane, 2 m × 10 m

Rank 2

ANSIO ANSIO weed membrane, 2 m × 10 m
6.9/10about £9.45
View offer
iropro iropro weed membrane, 3 m × 25 m

Best value

iropro iropro weed membrane, 3 m × 25 m
8.0/10about £33.47
View offer
On this page
  1. 1.Clear what is already growing
  2. 2.Overlap, peg and trench the edge
  3. 3.Cut for plants, then cover
  4. 4.When this is the wrong job

Clear what is already growing

A weed membrane is a light block on a raked surface, and plants that store food in their roots treat it as a lid. Annual seed in the top few centimetres loses the light and stalls. Couch grass and bindweed keep reserves in rhizomes and roots, so a sheet laid over those stores only delays the shoot that finds a join, a slit or a thin patch. Hy-Tex, on its Covertex notes, says persistent weeds may still penetrate. Start with a strim if the bed is tall, then lift the crowns and as much root as the fork will bring. Sharp stalks and stones puncture polypropylene once you kneel on it, so rake them off before the roll goes down.

Overlap, peg and trench the edge

GravelMaster’s Groundtex-style notes ask for at least 100 mm where the fabric is only suppressing weeds, and 300 mm when the same sheet is used as stabilisation under a load. Hy-Tex Covertex sits at about 150 mm, with about one pin per square metre. In this set of twelve amazon.co.uk listings, only one file states that pegs are included. Trench the perimeter 100–150 mm and fold the sheet into the trench before you backfill. A folded 3 m iropro and a folded VOUNOT both have to open flat. Which roll states the grams is on the ground cover buying guide.
VOUNOT VOUNOT weed membrane, 2 m × 10 m, 30 pegs

Testsieger

VOUNOT VOUNOT weed membrane, 2 m × 10 m, 30 pegs
8.5/10about £11.90
View offer

Cut for plants, then cover

Plants that stay in the bed need a slit. The Royal Horticultural Society describes planting through a permeable sheet by cutting the membrane rather than leaving a wide bare ring. A cross, with the four flaps folded back around the stem, leaves a smaller gap than a circle cut to the width of the pot. Pin or mulch the flaps so they cannot curl up in the first dry week. Cover the sheet the same day. Merchant notes ask for at least 50 mm of bark or stone over the fabric. Leaving the membrane uncovered is how bare polypropylene goes brittle. If the listing prints a face, follow that print. If both faces look like the same tape weave, the overlap and the cover decide whether the bed stays dark.

When this is the wrong job

A garden roll suits a bed, a border or a mulched path you will cover with bark or stone. It is the wrong tool when the ground has to carry cars, when you are wrapping a soakaway, or when the weed is Japanese knotweed. Gravel depth, angular stone and the England rule for a front garden over 5 m² belong on ground cover under gravel. Stop when the bed will not clear. Couch that snaps off in the fork, a slope where the trench will not hold, or a drive that already ruts under a wheelbarrow are the points where more pins only hide the problem.

Common questions

Do you have to kill weeds before you lay it?
You need to remove the growth that can push from underneath, and you do not have to use a named spray to do that. Annual weeds that are cut and raked lose the light once the sheet is down and covered. Perennials with roots still in the bed, especially couch and bindweed, come back at the joins if you leave them.
How much should sheets overlap?
Use at least 100 mm where the sheet is only there to block light, and move toward 150 mm if you want the figure Hy-Tex prints for Covertex. Use 300 mm when the fabric is doing stabilisation work, which is the larger number on Groundtex-style merchant notes, and that is a different job from a mulched border.
How many pegs do you need?
Hy-Tex works to about one pin per square metre, and gardener-supply pages add a pin about every metre along a free edge. A 10 m² bed is therefore in the region of ten pins before the overlap and the corners, and wind on an allotment uses more. Only one of the twelve listings in this comparison states that pegs are in the pack.
Which side of weed membrane goes up?
Follow a printed face if the roll has one. A plain woven polypropylene sheet often looks the same on both sides, and these listings do not give one “logo up” rule for every ASIN. In that case the face matters less than a 100 mm overlap, pins at the edges, and a cover of bark or stone.
How soon must you cover weed membrane?
Cover it the day you lay it. Trade notes ask for at least 50 mm of bark or stone, which shades the plastic and keeps the pins loaded. Bare polypropylene left for a bright week frays at the cuts and becomes brittle. If the mulch is a day behind, weigh the sheet so the wind cannot lift it.
When should you stop and call someone?
Call when the weed is knotweed, when the surface has to carry vehicles, or when you are building a soakaway that needs a drainage geotextile. A garden membrane does not become that product because you double the overlap.

Related pages

Woven ground cover or sheeting

Ground cover

Best weed membrane for beds, borders and long runs

Ground cover buying guide: read gsm, width and pegs

Weed membrane under gravel: depth, edges and drains

Sources

Public UK sources for this comparison. Prices, stars and review counts are the amazon.co.uk listings in this set, captured on 19 October 2026. Page updated 22 October 2026.

  1. RHS: mulches (retrieved 22 October 2026)
  2. RHS: gravel gardens (retrieved 22 October 2026)
  3. GOV.UK: permeable surfacing of front gardens (retrieved 22 October 2026)
  4. GOV.UK: permitted development rights for householders (retrieved 22 October 2026)
  5. Which?: weed suppressing membranes (retrieved 22 October 2026)
  6. Hy-Tex Covertex data sheet (retrieved 22 October 2026)
  7. GOV.UK: simpler recycling in England (retrieved 22 October 2026)
  8. Consumer Rights Act 2015 (retrieved 22 October 2026)