Installing insulation in walls will prevent costly heat gain and loss
Bulk insulation products such as, batts, rolls, blow-in cellulose fibers, rigid boards, expanding spray foam and pour-in-place will keep your building warm in the winter and cool in the summer.
Explore and compare different insulation products to find the best insulation for your project: http://www.naima.org/insulation-knowledge-base/general-overview-of-insulation.html