As you hire an Insulation Contractors St Paul MN you will want to consider the cost to hire him as well as the cost of the product. You likely have a budget for the building of your home, so that will be something to discuss when you sit down with the insulation contractor to talk about what you need. Making sure you have sealed windows and doors goes a long way, but it can only do so much. Without good insulating materials in your attic, you are almost certainly wasting money.