To craft 8 Weathered Wood Walls at a time, you'll need (as of R29 in February 2016): * 1 Canyonstone (any type, can also be Ruddy Canyonstone or Dark Canyonstone), * 2 Wood (any type of blocks of natural Wood or Log) and * 1 Stone Rod (made from Stone, Limestone or Bedrock in a Processor) Even though it is a wooden building block, the Weathered Wood Wall currently (as of R26 in December 2015) is fireproof. Even when throwing Fire Bombs at Weathered Wood Walls, they still will not go up in flames.