Electronic gable vents and power ventilators will state the amount of square footage they are capable of venting. Use buying guides such as Consumer Reports, Consumers Guide to Home Energy Saving, etc. for insights into quality and reliability. The majority of the heat loss in a home is through the roof, so make sure your attic has the recommended amount of insulation. Listed below are approximate costs for various types of insulation. The above costs are based on faced-insulation.
Insulation is rated by R-values and expresses the resistance to heat.
The higher the R-value the better the insulating power. R-values are clearly marked on all types of insulation. The R-value for loose or blown in insulation can only be determined after insulation has been installed. Batts are similar to rolls however, they come in 4 or 8 foot lengths. Blown in loose insulation utilizing pneumatic equipment insulation can be blown into ceilings or walls.