I purchased the 8m x 3m cabin for craft/hobby use. After completion of the build, the cabin is of solid construction and well insulated. This cabin size meant that inside it was divided into two sections 3x3m and 5x3m, enabling me to use the different areas for specific needs. I did, however, add an additional window as this size of cabin came with three windows as standard. I hope to enjoy my cabin for many years to come.