Structural Integrated Panels (SIPs) and Insulated Concrete Forms (ICF) are two examples. SIPs are made from compressed foam with pressed wood on either side and

Structural Integrated Panels (SIPs) and Insulated Concrete Forms (ICF) are two examples. SIPs are made from compressed foam with pressed wood on either side and are precut in the factory to fit together at the job site. ICFs are basically giant foam legos that you assemble together and then fill with concrete.