Highest R Value Insulation For Attic

In general an attic s r value should be between r 30 and r 49.

Highest r value insulation for attic.

Closed cell and open cell aka 2 pound and pound respectively. The r value for loose fill attic insulation is 3 3 inch thickness and is laid between the attic joists. Spray foam offers the best attic insulation performance available. Where you live different climates require different insulation r values.

The higher the r value the better the thermal performance of the insulation. 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. They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Choose from two types. In particularly cold climates you might go up to r 60. Your home s age if your home is more than 10 year old you likely need more insulation.

Some other factors to consider. Achieving greater r values in exterior walls. There are many ways to retrofit a home with fiberglass and. 6 305 btu hour 0 53 ton r 4 2 duct insulation.

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

R value is a measure of insulation s ability to resist heat traveling through it. Recycled glass or sand that s melted and spun into fibers. Insulation level are specified by r value. The higher the r value the greater the performance of the insulation.

Just how much you need for your residential or commercial building depends on a number of factors such as your heating system and location. 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. Recommended home insulation r values.