Attic Foil R Value

You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Attic foil r value.

Atticfoil works to block radiant heat 97 coming in to the attic by stapling it to the rafters but it has no r value. Products 60 48 26 rolls. Radiant barrier on its own has no r value. Traditional attic insulation has r value.

Existing 3 4 inches of insulation. More information about r value and radiant barriers. R value is attributed to materials slowing conductive heat. Achieving greater r values in exterior walls.

Reflectix can provide verification for all r values stated for all products and applications. Air inherently has an r per inch value of 5 6 and is an excellent insulator when radiation and convection are controlled. 48 wide perforated double sided radiant barrier foil best selling. Standard foam board by dow chemical or owens corning has a known r value of between 5 and 6 per inch.

In summary you increase the r value of your existing insulation by installing a radiant barrier foil insulation product. Most are about a thick or less. Studies have found the following about radiant barriers to be true. A tennessee valley authority study based on radiant barriers used in the summer found that.

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. What about r values for a reflective insulation and why do they vary with application. Add insulation to attic. 26 wide perforated double sided radiant barrier foil for trusses.

An r 13 batt of fiberglass insulation is 3 5 thick. The higher the r value the more resistant a material or building assemblage is to conductive heat transfer. This is important to understand because radiant barrier does not take the place of traditional insulation fiberglass cellulose etc. R values for reflective insulations are dependent.

This works to slow conductive heat. What is the r value of your radiant barrier. This might surprise you but radiant barrier foil on its own has no r value.