Attic Foil R Value

Traditional attic insulation has r value.

Attic foil r value.

Reflectix can provide verification for all r values stated for all products and applications. A tennessee valley authority study based on radiant barriers used in the summer found that. Atticfoil works to block radiant heat 97 coming in to the attic by stapling it to the rafters but it has no r value. The higher the r value the better the thermal performance of the insulation.

Products 60 48 26 rolls. Radiant barrier on its own has no r value. R values for reflective insulations are dependent. 48 wide perforated double sided radiant barrier foil best selling.

This might surprise you but radiant barrier foil on its own has no r value. 26 wide perforated double sided radiant barrier foil for trusses. The higher the r value the more resistant a material or building assemblage is to conductive heat transfer. Studies have found the following about radiant barriers to be true.

More information about r value and radiant barriers. R value is attributed to materials slowing conductive heat. What is the r value of your radiant barrier. Let s take a look at the actual r value of eshield solarguard prodex and bubble foil products.

In summary you increase the r value of your existing insulation by installing a radiant barrier foil insulation product. This is important to understand because radiant barrier does not take the place of traditional insulation fiberglass cellulose etc. What about r values for a reflective insulation and why do they vary with application. An r 13 batt of fiberglass insulation is 3 5 thick.

Recommended insulation levels for retrofitting existing wood framed buildings. Standard foam board by dow chemical or owens corning has a known r value of between 5 and 6 per inch. Add insulation to attic. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Triple pane windows with low e surfaces perform better than a triple pane window without low e surfaces because of the reduction of radiation low emittance across the air spaces. Air inherently has an r per inch value of 5 6 and is an excellent insulator when radiation and convection are controlled. Most are about a thick or less.