Established in 1982, Interior Systems, Inc. (“ISI”), is the leading subcontractor in the Treasure Valley and surrounding area ... s (Boise, ID), specializing in the following services for large commercial, industrial, and government related projects: • Light Gauge Metal Framing • Drywall • Acoustical Ceilings • Exterior Insulation and Finish Systems • Sprayed Fireproofing • Exterior Panel Systems • Demountable Partitions • Access Floors • Insulation • Glass Fiber Reinforced Concrete and Glass Fiber Reinforced Gypsum Company longevity, commitment to quality and solid, award winning reputation has made ISI one of the largest interior wall/ceiling contractors in the Northwestern United States. ISI is proud to provide our employees with company ownership through our Employee Stock Ownership Plan. As an ESOP company, our employee owners have the opportunity to share in the growth and long term success they create. read more