19 [Non-metal building materials, namely, timbers, shakes and shingles, stair heads, stair jacks, stair risers, railing, decking, lattices, spindles, handrails, posts, balusters, joint pins, screen panels, gazebos, gates, post tops and caps, edging, stakes, foundations, posts and poles, soffit and fascia, cladding, floor joists, pilings, sill plates, sashes, headers, sheathing, trim, girders, columns, flooring and subflooring, rails, siding, rafters, studs, ceilings, materials for the construction of greenhouses, and wooden landscaping materials, namely, walkways and patio squares; non-metal fencing materials, namely, gates and fencing panels; timber other than unsawn timber; articles made of timber, namely, construction timber, building timber, transportable buildings of timber, sheds and log cabins]