How do I Lay a Weed Membrane? – FAQ’s answered

How do I lay a weed membrane?

  • Prepare your area – Remove all weed and plants and any stones to create a clear flat surface.
  • Un roll your fabric over your chosen area.
  • Make sure it is in the correct position then secure down.
  • Be sure to Overlap any edges at least 30cm at any join. You can also tape joints to provide more stability.
  • Secure any edges to prevent movement with pins.
  • Make sure membrane is covered sufficiently by 5cm of gravel, chipping s or mulch.

Top Tips

  • Use a sharp Stanley blade if you need to do any cuts around garden features.


  • Work out your area to be covered with the least amount of overlapped sections. Cover your longest side first is always a good rule of thumb.


  • Cover your membrane ASAP, UV rays can degrade fabric left out for long periods.

Why use weed membrane?

  • Easy to install and easy to maintain
  • No need for chemicals
  • Stops seeds germinating for a long period
  • Keeps soil ready for use when you want in the future.

Woven Geotextile is a good long term answer for weed prevention. It is especially good for areas like paths and walkways.

Standard Non Woven geotextile will protect against weeds but allows air and water through to keep soil healthy. Great for temporary weed prevention in allotments or vegetable patches.

Thicker heavy weight Non woven Geotextile has has carbon added to prevent UV breakage. A long term weed solution. It still allows water through and provides a thicker and cushioned finish as well as a darker colour option.


What do I need geotextile membrane for?

Geotextile membranes are a versatile construction fabric that is used for drainage, filtration, reinforcement, separation and to prevent erosion. The fabric is placed in sub bases of many projects.

What projects need non-woven membrane?

Non-woven membrane is a heat bonded or needle punched fabric that is perfect for drainage. It will also act as a stabilisation and separation layer in projects like shed bases, patios and artificial grass installs. It shines as a soakaway fabric to keep soakaway systems working well for many years.

What projects need woven membrane?

Woven membrane is a strong durable fabric consisting of plastic tapes woven together to form a fabric. This fabric has low permeability and high strength. Making it perfect for erosion and slope control, separation in roads or high traffic areas or weed prevention due to its UV stability.

How will I know when I will need a heavier weight membrane?

Do you need to consider loading, level of traffic and exposure when considering a GSM weight of your fabric.

How long will a geotextile last?

If installed well a fabric can last 20 years

Is there a way I have to lay my geotextile fabric?

The fabrics do not have a specific way round they need to be laid, just be sure any rocks/stones and plants are removed before putting down then consider how to secure.

How do I secure my geotextile?

Pin, pegs, overlap, tape

How do I work out how much geotextile I need?

L  x   W =M2 area

Where do I place my membrane?

Geotextile membrane are usually part of the sub base of a project, so they fit in either between sub base and aggregate or aggregate and top finish. This is to keep layers separate and stop mixing over time.

Do I need geotextile for my project?

Yes for the cost a membrane will help to keep any project base going strong for the long term. It is a quick and easy install just unroll and secure before continuing. What’s to lose

Do I need a geotextile for a driveway?

Ok so your new driveway will be installed in layers usually the ground is cleared then levelled and sand/screed layer put in, then paving added and finished. Overtime with movement weight and daily activity the paving will shift and move this in turn will shift and move the sand screed layer, leading to bumps, dips also add in rainfall that will also move any particles of the sub layers away. In a few years your prefect driveway may be looking tired and the only way to fix it will be to rip it up and re lay it all again. The geotextile layer will help provide a stabilisation layer against the movement and stop the layers mixing so ruts and bumps do not develop. Also a non-woven membrane will allow water though and water will not leech away sand/subsoil it will drain thought.

What’s best practice when laying a geotextile?

Firstly consider you area to be covered and if you also need to add any extra fabric for overlapping along any joins. Best to lay your fabric with the least occurrence of overlap, working to your shortest side. 

Make sure you prep any surface before installing.

What goes GSM mean?

GSM is an acronym for grams per square metre and is a measure of weight for fabrics including construction fabrics. Generally the higher the thicker the fabric.

Where do I put my geotextile in an artificial grass install?

Between your soil and sand layer

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