Alton design features also include an easy-glide sliding door (kerbless for easy wheelbarrow access), pre-glazed puttyless roof vents, sturdy guttering and downpipes and a unique ventilation system which discourages the common plant disease grey mould. ALTON GREENHOUSES are manufactured from the finest Canadian Western Red Cedar - a managed and replanted natural resource. If any part of the Ced... View details & Shop online