Building materials (non-metallic); articles made of non-metallic materials for construction purposes or building purposes; articles made of non-metallic materials for defining barriers; expansion joints of non-metallic materials for use in building or construction; components for use in flooring construction, decking construction, joinery or carpentry; non-metallic flooring components; non-metallic decking components; flooring accessories including spacers and wedges; decking accessories including spacers and wedges; flooring spacers; decking spacers; flooring wedges; decking wedges; flooring spacer kits; decking spacer kits; flooring board spacing assembly; decking board spacing assembly; plastic flooring materials; plastic brackets for flooring; alignment strips for flooring; alignment strips for decking