Machined in house from a slow grown and kiln dried Scandinavian Redwood, our shiplap is high pressure treated through our audited ISO9001 high pressure treatment plant to protect it against decay and insect attack. Shiplap is popular for a variety of end uses including sheds, summer houses, stables and general cladding projects. The raw material we use to machine our shiplap from is from sustainable sources and comes either FSC® or PEFC certified.