Fibreglass insulation is a popular, well-known product. Fibreglass batt insulation is widely used in the attic and inside walls, while fibeeglass loose fill insulation can be blown into large spaces like attics (and wall cavities). Both options offer adequate resistance (measured in R-Value) and will contribute to energy savings. The lifespan for fibreglass insulation is satisfactory, and insulating potential is maintained over time. For professional installers, both products are easy to transport and install.