For optimum results:

• Remove any non-organic waste, pointed or sharp-edged stones and weeds from the soil.
• If necessary, dig out the turf to a depth of a few centimetres.
• Be sure to completely dig out any underground runners from weeds. Some weeds are strong enough to push through the weed membrane.
• Next, break up the soil and then smooth it over.
• The weed membrane can now be laid as required.