Thank you for your interest in Engineered Panel Designs, Inc. (EPD) and Structural Insulated Panels (SIPs). SIPs offer advantages for both Builders and Homeowners. Engineered Panel Designs, a distributor of Insulspan Structural Insulated Panels, provides sales, fabrication and design services of Structural Insulated Panels for Ohio and western Pennsylvania. In addition, EPD is a Trus Joist ...