Already an authorized dealer for Riverbend Timber Frame, AHC has added INSULSPAN to its portfolio. Insulspan is a manufacturer of Structural Insulated Panels (SIPS) which offers an alternative to regular stick frame construction for both commercial and residential building. Insulspan's SIPS building system consists of solid, one-piece, pre-cut SIP units that are ready to install as wall, floor or roof components suitable for many residential and commercial building applications. Each SIP consists of a core of molded expanded polystyrene (EPS) insulation with engineered oriented strand board (OSB) laminated to the top and bottom faces.