Our high-grade CLS is taken from Spruce (Whitewood) and imported from a range of trusted suppliers. CLS is used primarily in timber frame home construction and for internal and partition walls. The product originated for the Canadian market – hence its full name – Canadian Lumber Standard timber. The CLS we stock is taken from Spruce (Whitewood), graded in accordance with British Standards to either C16 or C24 grade, kiln-dried, planed and finished with eased edges.
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