If you are going to build raised beds, we recommend that you cover the inside with fiber cloth.
It helps to prevent soil and weeds from creeping out from the bottom and into the joints if you put several on top of each other.
The fiber cloth is not woven and the price is per running meter.
We recommend 6 meters for 2 raised bed frames in the dimensions 80 x 120.
The weed cloth is lined on the inside and can be held in place with clips, small nails or the like.