Today, most existing—even modern—buildings have surprisingly low thermal performance from their building envelope. This increases the ever-growing, and unnecessary strain on the environment and our society’s energy infrastructure. Building codes and energy standards are incrementally becoming more stringent but cannot out-pace the available building technology when demanding greater performance. Essentially, for a building code improvement, there first must be new tech, then you can change a code; it doesn’t work in the opposite order. New or recently strengthened energy codes coming into effect in many regions of North America all require overall building energy usage intensity to be limited to aggressively-low targets. Now—this year—the world’s first fiberglass window wall has been launched. This innovation—while structurally and economically as efficient as traditional aluminum window framing—marks the very first time passive-house level thermal performance is available in a commercial-scale, cost effective fenestration system. New reductions in building costs are possible, due to improvements in fenestration efficiency. Many building configurations may now cost less to construct—in compliance with the latest energy standards—than recent, conventional buildings.