For a secure and comfortable installation, a well-built platform is a necessary foundation. To ensure a weatherproof installation the platform needs to be circular and the same diameter as the yurt so the side cover fabric can extend below the interior floor level. This provides a draft-free and watertight seal. The yurt platform can be made from wood, concrete or SIPs (Structural Insulated Panels). Any exterior decking should be separated from, or at a lower level than the yurt platform. Unless you are skilled, enlist the help of an experienced carpenter for building the platform. Downloads for suggested platform construction can be found at: https://www.yurts.com/downloads/.