A gable to gable roof addition extends a gable roof from the original structure to create additional space. It involves adding a new roof with two gable ends, resulting in an extended peak and increased roof height. This type of addition requires careful planning by architects and structural engineers to ensure proper load distribution and structural integrity. Roofing contractors are responsible for installing the roofing materials, while framing contractors frame the new roof structure. Building materials suppliers provide the necessary materials, including lumber, truss systems, and roofing materials.