In the case of walls, the composition can also impact the R-values needed for optimal energy efficiency. The most common insulation materials are fiberglass, cellulose and foam. Insulation types include loose fill, batts, rolls, foam board, spray board and vapor barriers.Improve the thermal comfort of your home: keep your home warm in the winter and cool in the summer. Save money on energy bills by reducing heat loss through your external walls. Reduce the amount of noise that enters your home from outside. Improve your property’s fire resistance.