Savings Due To Roof Insulation

For a system that generally costs between 2 3 per square foot you can see that it won t take long to recoup your costs through energy savings.

Savings due to roof insulation. After that you will have a good picture of what your house lost in energy through the year. The savings and payback vary substantially depending on the existing level of insulation but are typically between 5 20 years. According to the epa you can expect net annual savings of just under 50 cents per square foot of roof. Knowing the cost of energy and the cost of the insulation upgrade you can calculate the rate of return on your investment in insulation.

It is not easy to calculate. In order to get a reasonable answer one must do some testing and compare to the energy used by the house with local weather. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. Knowing the r values before and after an insulation upgrade and the average temperature difference across the insulation you can calculate the amount that the insulation upgrade reduces heat flow.

If the roof is not being replaced for other reasons it is typically not cost effective to add insulation. Upgrade from r to r h ft f btu details of comparison. Epa estimates that homeowners can save an average of 15 on heating and cooling costs or an average of 11 on total energy costs by air sealing their homes and adding insulation in attics floors over crawl spaces and accessible basement rim joists.