Abstract: Described herein are embodiments of an approach to attaching one or more photovoltaic (PV) modules to a roof of a building. More particularly, described herein are embodiments of an approach to attaching glass-glass PV modules using an adhesive. Such an adhesive may be applied to contact points between the roof and a support frame that holds the glass-glass PV module(s) in place and that may be mechanically coupled to the glass-glass PV module(s). Use of the adhesive in this way may be particularly advantageous when the roof is sloped, including when the roof has a steep slope, which may include roofs having a rise-to-run ratio greater than 4:12, greater than 6:12, or greater than 8:12. The adhesive may, in some embodiments, aid in reducing, minimizing, or eliminating the use of mechanical anchor points that may be needed to support the glass-glass PV module(s) on the roof.