19 Lumber; plywood; building materials, namely, wood panelling, wood-fibre cement panelling, edgebanding, wood, vinyl and composite siding, wood and pressure treated wood spindles, wood and pressure treated wood columns, stairparts, namely, risers, treads, handrails and balusters, decorator wood legs, and oriented strand board; flooring, namely, resilient flooring in the nature of vinyl, wood and composite flooring, pre-finished hardwood flooring, unfinished hardwood flooring, floor applicators; pressure treated lumber, plywood and building materials, namely, wood panelling, fibre cement panelling, edgebanding, siding, spindles, columns, stairparts, decorator legs, and oriented strand board