Timber Retaining Walls Whether you are wanting to increase the amount of level useable land, raise your garden, define a boundary or put in a driveway by cutting away from a sloping bank, timber retaining walls offer you an easy solution. Timber is easy to work with requiring only basic tools, our design tables and design tool. The options and different effects that the Pinex® range of retaining walls products are endless. Leave your wall to weather for a natural look, blending in with your garden, or use paint to high light it as a feature. Smokey blue retaining walls provide great contrast to a brilliant green specimen tree.