Other key structural decisions

Building methods mostly deal with wall construction, although some types, such as ICF or prefabricated buildings, may be able to build the roof out of the same material as the walls. The decision to make on the roof at this early stage is if you plan to have a cut roof, i.e. lengths cut on site which is a more expensive method but allows later conversion of the attic space, or a truss roof, which is prefabricated and lifted in place with a crane.