This Catio (cat patio) is constructed of Swedish Redwood 50mm x 38mm (2″ x 1 1/2″). The Catio panels are wired to the inner face so as to keep the timbers clean. The door panel is constructed as a full panel (this is optional as having the half door height is not a problem). On larger structures it is possible to have an internal Catio door panel. There is a kicking place at the bottom of the panels to prevent wire damage. This is approximately 38cm (15″) high. The timber is treated with a timbertex water based preservative. All timbers are held together with zinc plated screws.