The company’s wall and roof panels feature 7/16-inch OSB sandwiching a core of partially recycled expanded polystyrene. The panels come in five thicknesses for R-values ranging from 16 to 48. Four-foot and 8-foot widths are offered. SIPs foundation panels also are available, providing an R-value of 32 versus the conventional basement insulation value of about R-11. These panels feature 5/8-inch treated plywood and an EPS core, range in height from 8 to 10 feet, and include glulam spines installed 4 inches o.c. to ease installation. 800.977.2635. www.extremepanel.com.