Wooden Tongue Groove Shiplap is an easy and excellent way to clad timber frame or even brick built buildings. Sheds, summerhouses, cabins and even garages can be made to look new with this kiln dried timber cladding. Pressure treated, FSC certified timber has been used in the manufacture of this cladding, ensuring sustainability and providing a 15 year anti-rot guarantee. This shiplap cladding can be painted, varnished or stained to suit the project. Please allow the cladding to dry completely before applying further preservative. This 12mm shiplap cladding is tongue and grooved, which makes it stronger and more durable than overlap cladding, and also helps to protect your building from the elements. Specification - Vertical bracing uprights 42mm x 28mm - Gap between horizontal.