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Insulation Choices provided by Building Science Inc
Often, work can be made more difficult and expensive based on the order in which it is done. Sealing air leaks for energy efficiency should precede insulation, which can hide leaks and has to be moved out of the way. Different insulation types are more effective in certain applications, and often a combination of types is the best solution. The home energy audit can help make these calculations and prioritize your weatherization efforts in the most cost effective order.
Blown Cellulose
This type of insulation is an excellent alternative to standard fiberglass batts. It costs a bit more, but fills in, therefore seals as well as insulating, significantly better around irregularities like electrical boxes or warped framing boards. It is also a better sound insulator. Read More: http://blog.resnet.us/insulation/blown-in-insulation/
Batted Fiberglass
Fiberglass insulation is a cost-effective method to insulate standard size cavities, such as between wall studs or ceiling joists. The thicker the better is the general rule. Its effectiveness depends greatly on the fit in the cavities, not compressing batts or leaving voids, and effective air sealing before installation. Read More: http://www.resnet.us/trade/batt-and-roll-insulation
Insulating/Sealing Foam Sprays
High quality, but more expensive, foams (closed cell and open cell) provide an extra level of sealing when insulating your house. It serves as an insulator and a vapor barrier, even water tight seal with fireproof characteristics. Vermin and insects don’t like it for their new home either. Read More: http://www.resnet.us/trade/foam-insulation