Reflective Attic Insulation R Value

What about r values for a reflective insulation and why do they vary with application.

Reflective attic insulation r value. Know exactly how much you need with our project calculators. If you don t provide air space this product provides almost no insulating value. The rubber meets the road on reflectix s website where it says no air space no reflective insulation benefit. The overall r value of a wall or ceiling will be somewhat different from the r value of the insulation itself because heat flows more readily through studs joists and other building materials in a phenomenon known as thermal bridging.

When determining how much insulation you need don t guesstimate calculate. R values for reflective insulations are dependent. An r value is a measure of an insulation product s resistance to thermal heat transfer. The higher the r value the greater the insulation performance.

For example insulation that is compressed will not provide its full rated r value. Because of the presence of the small insulating layer a reflective insulation product by itself achieves a small r value typically around 1 0. An r 1 1 is provided from the product itself for the reflective double bubble material. Most people are familiar with the term r value when discussing insulation properties.

It s a measure of how long it takes a heat absorbing product to absorb 100 of its potential and begin to transfer that heat out the other side of the product. Reflectix can provide verification for all r values stated for all products and applications. The higher the r value the more resistant a material or building assemblage is to conductive heat transfer.