Highest R Value Insulation For Attic

7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load.

Highest r value insulation for attic.

In general an attic s r value should be between r 30 and r 49. Spray foam attic insulation. R value is a measure of insulation s ability to resist heat traveling through it. Your home s age if your home is more than 10 year old you likely need more insulation.

The duct insulation r values i mentioned above are what s on the product label. An insulation r value chart or table can assist you with the calculation to ensure your attic or wall r values are adequate for your. Closed cell and open cell aka 2 pound and pound respectively. Choose from two types.

There are many ways to retrofit a home with fiberglass and. The r value for loose fill attic insulation is 3 3 inch thickness and is laid between the attic joists. The table below shows what levels of insulation are cost effective for different climates and. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Where you live different climates require different insulation r values.

6 305 btu hour 0 53 ton r 4 2 duct insulation. The higher the r value the greater the performance of the insulation. How often do you think you get the full labeled r value. Recommended home insulation r values.

Your home s r value score will guide you toward the type of insulation you need. Insulation level are specified by r value. Just how much you need for your residential or commercial building depends on a number of factors such as your heating system and location. In particularly cold climates you might go up to r 60.

Cavity wall insulation polyurethane foam has the highest r value 6 5 inch thickness of all the spray in insulation but it is also the most expensive. Achieving greater r values in exterior walls. Some other factors to consider. The higher the r value the better the thermal performance of the insulation.