Western Red Cedar is much loved and well known, but other options include Siberian Larch and Thermo treated woods. Engineered types include Enduras wood material (containing 60% wood and available in more than 50 colours) and the Dekopan plus collection of wood type finishes.
One company that does all these types and more is Havwoods Outdoors. Innovative products in the range include the Faux Timber cladding shown in the picture; this intriguing new range has similar surface hardness to hardwood, with a non-porous surface that will never rot, warp or give splinters. It is produced using recycled materials too!