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.

Highest r value insulation for attic.

Recommended home insulation r values. Choose from two types. The duct insulation r values i mentioned above are what s on the product label. 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.

In general an attic s r value should be between r 30 and r 49. R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost effective for different climates and.

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. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Achieving greater r values in exterior walls. They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.

6 305 btu hour 0 53 ton r 4 2 duct insulation. 7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. Your home s r value score will guide you toward the type of insulation you need. The higher the r value the greater the performance of the insulation.

The r value for loose fill attic insulation is 3 3 inch thickness and is laid between the attic joists. Insulation level are specified by r value. Closed cell and open cell aka 2 pound and pound respectively. Your home s age if your home is more than 10 year old you likely need more insulation.

Some other factors to consider. Spray foam offers the best attic insulation performance available. 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. How often do you think you get the full labeled r value.

Spray foam attic insulation. Recycled glass or sand that s melted and spun into fibers. Where you live different climates require different insulation r values. In particularly cold climates you might go up to r 60.