Green building has gotten yet another boost with a sizable investment to the Canadian firm Dirtt Environmental, which makes modular floors, walls and equipment that can be assembled and taken apart as needed. The company received C$25 million from the Canadian firms Canaccord Adams, Blackmont Capital and D.F. Mackie, according to VentureWire (subscription required). Dirtt also recently bought Spider Manufacturing, which makes reusable electronic components that Dirtt can sell alongside its building materials. Some similar companies we've included in recent coverage are Hycrete and Serious Materials, both of which have gained some traction in the green building market.