All timber is Forest Stewardship Council (FSC) Certified to produce an environmentally friendly and quality garden building. Green mineral felt is also included. The building is supplied untreated and requires a wood preservative immediately after assembly. The porch consists of 25mm pressure treated decking. The doors and four opening windows include a draft seal system. Building dimensions are to the edge of the individual boards that make up the unit and will include the crossover of the logs. For critical dimensions use the metric values, imperial dimensions are rounded for description only. Allowance should be made for the roof overhang and for access around the outside during construction and subsequent treatment. The timber floor is included. Please note that log cabins are made up of individual log lengths to be built up one by one not ready made panels. Mighty 44mm interlocking logs Two separate rooms for a very versatile building Proudly made in Britain from high grade pine Planning friendly ridge height - max 2.5 mtrs