Scaffolding, not of metal; bricks; synthetic flooring materials or wall-claddings; asphalt; plaster; lime building materials; plaster for use in building; erosion control sheeting or fabric for construction use; plastic security windows allowing communication; cement; building timber; building stone; building glass; staircases, not of metal; stairways, not of metal for use in buildings; stair treads not of metal; non-metal stairs