Using factory prefabrication, Duro-Last, Inc. produces 80-85% of the seaming in a controlled environment to provide quality-assured products, thus reducing liability of behalf of all parties involved. Only 15-25% of seaming is done in the field, allowing peace-of-mind for the architect, specifier, consultant, contractor, building owner and the manufacturer. In addition, prefabrication reduces the material waste associated with roll goods systems. Since each project is pre-engineered and designed for the specific needs of each individual application, it provides precise coverage. Duro-Last manufactures a full line of standard and custom-made accessories.