Hanging out on the roof of Houston’s new Central Permitting and Green Resource Center at 1002 Washington Ave.: Solar panels, anchored by the first-ever commercial installation of Metalab Studio’s new PV-Pod. The local architecture firm developed the hollow high-density polyethylene pods with support from a UH Green Building Components grant. There’s one pod for each panel, and each is filled up with just enough water to resist required wind forces. This kind of assembly is much simpler to install than a typical photovoltaic-panel rack system with concrete ballast blocks, claims Metalab’s Andrew Vrana. It also allows for a more flexible layout. The new permit building opened for business yesterday.