Attic Foil R Value

Reflectix can provide verification for all r values stated for all products and applications.

Attic foil r value.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. Radiant barrier on its own has no r value. This is important to understand because radiant barrier does not take the place of traditional insulation fiberglass cellulose etc. Achieving greater r values in exterior walls.

A tennessee valley authority study based on radiant barriers used in the summer found that. Most are about a thick or less. Existing 3 4 inches of insulation. R value is attributed to materials slowing conductive heat.

The higher the r value the more resistant a material or building assemblage is to conductive heat transfer. 48 wide perforated double sided radiant barrier foil best selling. Studies have found the following about radiant barriers to be true. This works to slow conductive heat.

Products 60 48 26 rolls. Air inherently has an r per inch value of 5 6 and is an excellent insulator when radiation and convection are controlled. An r 13 batt of fiberglass insulation is 3 5 thick. The higher the r value the better the thermal performance of the insulation.

Traditional attic insulation has r value. What is the r value of your radiant barrier. More information about r value and radiant barriers. In summary you increase the r value of your existing insulation by installing a radiant barrier foil insulation product.

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. Add insulation to attic. Recommended insulation levels for retrofitting existing wood framed buildings. What about r values for a reflective insulation and why do they vary with application.

Atticfoil works to block radiant heat 97 coming in to the attic by stapling it to the rafters but it has no r value. Standard foam board by dow chemical or owens corning has a known r value of between 5 and 6 per inch. Let s take a look at the actual r value of eshield solarguard prodex and bubble foil products.