The present disclosure relates, in some embodiments, to TPO roofing apparatus, systems, and methods. For example, a method may include applying profiles to a substrate before applying a TPO membrane to the substrate. For example, an installation method may comprise, in some embodiments, laying out the spacing for one or more roof profiles on a substrate (e.g., a roof deck), attaching the one or more profiles to the substrate, applying a membrane (e.g., a self-adhesive TPO membrane) to the substrate between the profiles, and/or sealing the edges of the membrane to the profiles.