Square Timber profile is the most versatile timber profile it and can be used on several constructions e.g. open gap, closed, board on board, Yorkshire boarding, slatted, contemporary etc. This profile can be used as main cladding, fencing or decking use or as trims, corners, finishing pieces and reveals. These need to be face fixed and we supply these in Siberian larch and western Red cedar. Other names of Square timber profile are PSE (Planed Square Edge), DAR (Dressed All Round), PAR (Planed All Round), PAO ( Planed all over), 4R3 ( planed smooth with a radius on every long edge).