UK Larch is an indigenous species which grows in various parts of Britain which, when used for cladding gives an improved carbon footprint to local projects and developments over Siberian Larch. British grown Larch is naturally moderately durable softwood in view of its high resin content with a colour that ranges from a light-dark brown heartwood to a white sapwood.
Compared to Siberian Larch, British grown Larch is typically warmer in appearance having a rich heartwood colour, it has a greater number of knots and perhaps more grain character. Knots are brown and can be scattered and frequent, and they may loosen and weep resin for 12-18 months.
It will colour down to a silver grey if it is not protected as soon as it is installed.
It is a very strong and hard-wearing wood and is much faster grown than Siberian Larch. It can be sawn and machined fairly well however it can split on nailing so pilot drilling of fixing holes is recommended particularly at board ends. There is a tendency for knots to be loose which can be a problem.