British CLS Studwork timber, used for the construction of studwork and carcassing, as well as a host of other applications within the construction and DIY industries. This high quality timber is British whitewood and is a 70% FSC mix, and is pressure treated for long life (please see details below). Our treatment process gives timber a proven performance of 5-10 years, and in many cases much longer. Can be used indoors or outdoors!