Colorado Doorways supplies commercial hollow metal doors, frames and hardware from a Denver fabrication facility. Its in-house hollow metal shop is authorised to apply both UL and Warnock Hersey fire labels to rated door and frame assemblies, which allows rated openings to be modified and re-certified locally rather than returned to the maker. All doors and frames are stated to be tested in accordance with SDI and NAAMM standards. It serves commercial construction across the Front Range.