I heard that some local window tinting services also offer tints for homes and offices. It sounds like a great way to save on energy bills. Have you looked into any places that offer both automotive and residential services? https://sites.google.com/d/1NnlFR8Ol-04YGDWgy01OzJp-eMCxaEwc/p/1yCS8MIjqoZuKe6o_tU4BDC__wCZ45rLk/edit