Are you planning to replace your old insulation, or are you planning to install insulation for the first time in a new home? If so, you may want to consider expanding foam insulation. It is the most effective type of insulation on the market today. It allows you to keep your heating and cooling costs to a minimum. You can hire a professional to do the work for you, or you can rent the equipment and apply the insulation yourself. If you choose to do it yourself, you should be careful not to inhale the spray foam insulation. You should wear a mask when you are spraying the chemicals. Since the insulation expands, inhalation of the chemicals can cause respiratory distress.