BOUNDARIES UNBOUND

Metal folding and sliding doors; metal windows; metal partitions; doors made of aluminum and also including glass; metal patio doors; and sills, thresholds and seals for metal doors

Non-metal folding and sliding doors; non-metal windows; non-metal partitions; non-metal patio doors; doors of wood clad in aluminum; non-metal door units; and sills, thresholds and seals for non-metal doors