This extremely sturdy british workshop from shire is traditionally manufactured from high grade fsc certified timber the ledged and braced double doors are standard and can be fitted in any panel the 3quot x 2quot framing and fully braced panels make the mammoth one of the strongest workshops available the roof and walls are constructed using 12mm shiplap with a heavy duty 16mm tongue and groove floor with 3quot x 2quot floor joists felt fixing kit and instructions are all supplied