Spray foam insulation is made up of a polyurethane foam that can be applied everywhere you would install standard fiberglass insulation.
Although the product is more costly and labour intensive, foam will pay for itself quickly. Heating and cooling costs can be reduced by 30-50%. No other product has a higher R-value per inch. Foam insulation expands to fill all cracks, eliminating drafts and air movement. This effectively eliminates moisture problems and retains humidity levels in the home in the winter season.
Foam insulation has other benefits beyond being a superior insulator.