The whole point of insulation is that it keeps your house at the temperature that you want it. In order to do its job, insulation needs to cover all the available space. That means no gaps, no empty spaces, and no voids. What Is the best insulation to make sure that this happens?
This kind of insulation comes in large rolls. The rolls are cut into sections that will fit the voids that fit in between beams and supports. The batting insulation can be made of two different things, fiberglass or cotton. Fiberglass is the more common and traditional kind. Cotton is newer and is generally made out of things like recycled denim. When it comes to R value, both kinds of insulation are about the same. The biggest problem with batting insulation is that it is nearly impossible to make sure that there are no empty spots or gaps on the insulation. That renders the insulation less effective. It can also be very labor intensive, since it all needs to be custom cut to fit the space, and it takes time to track down all the gaps and try to fill them up.
Blown In Insulation
This kind of insulation is a loose insulation that gets put into a large tank and literally blown into your walls or attic with a large hose. This insulation is most often made of cellulose. Cellulose is a wood or paper fiber. The cellulose is often gotten from things like recycled newspapers. However, it can also be made out of fiberglass or cotton. The biggest benefit to using blown in insulation is that it fills up every bit of the space to be insulated, making it every efficient and increasing its R value. It's also much less labor intensive. One disadvantage is that sometimes the air is set too high and the insulation gets too fluffy, so it may settle more than you would like over the years.
Spray Foam Insulation
This kinds of insulation is made of an expandable foam that gets sprayed into the space. It takes less than you might think it would because of the fact that it is expandable. Once it feels up the space, it hardens. There are a few benefits to using this kind of foam. One is that you aren't limited to installing it on the floors or putting walls up over the insulation quickly. The foam stays up where it is put, so it can get sprayed on to the ceiling or walls without needing immediate support. A drawback is that it is more expensive than other forms of insulation.
Knowing the different corms of insulation can help you choose the right one for your needs. You can call a contracting company and ask them for their opinions on which would be best. They will come out and evaluate your space and tell you what they suggest.