Highest R Value Insulation For Attic

The r value for loose fill attic insulation is 3 3 inch thickness and is laid between the attic joists.

Highest r value insulation for attic.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Closed cell and open cell aka 2 pound and pound respectively. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Your home s r value score will guide you toward the type of insulation you need.

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. Just how much you need for your residential or commercial building depends on a number of factors such as your heating system and location. Choose from two types. Recycled glass or sand that s melted and spun into fibers.

7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. 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. The higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it.

Some other factors to consider. In particularly cold climates you might go up to r 60. The higher the r value the greater the performance of the insulation. 6 305 btu hour 0 53 ton r 4 2 duct insulation.

Insulation level are specified by r value. The duct insulation r values i mentioned above are what s on the product label. Recommended home insulation r values. There are many ways to retrofit a home with fiberglass and.

Spray foam attic insulation. How often do you think you get the full labeled r value. Spray foam offers the best attic insulation performance available. The higher the r value the better the thermal performance of the insulation.

Achieving greater r values in exterior walls. They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively. 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. The table below shows what levels of insulation are cost effective for different climates and.