As compared to other forms of insulation, expanding foam is the most expensive. However, the cost is worth it because expanding foam insulation is the most effective form of insulation. When you use this form of insulation, you are assured of warmth in the house during winter and coolness during summer. There is no time that external temperatures will have a noticeable effect on the internal temperatures of your house when you use expanding foam . How to use expanding foam  Expanding foam requires professionalism during installation. Since you do not know how to use expanding foam, it best that you consult the services of a professional because only professionals know the right ways to install expanding foam insulating material. Expanding foam costs much and so it would be unwise to waste it by not installing it well.   The cost of spray foam insulation   On average, the cost of expanding foam insulation ranges between $1.50-$4.90. That is costly and many may not opt for t