Reflective Attic Insulation R Value

An r 1 1 is provided from the product itself for the reflective double bubble material.

Reflective attic insulation r value.

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. An r value is a measure of an insulation product s resistance to thermal heat transfer. Because of the presence of the small insulating layer a reflective insulation product by itself achieves a small r value typically around 1 0. R values for reflective insulations are dependent.

Reflectix can provide verification for all r values stated for all products and applications. The rubber meets the road on reflectix s website where it says no air space no reflective insulation benefit. Know exactly how much you need with our project calculators. Most people are familiar with the term r value when discussing insulation properties.

For example insulation that is compressed will not provide its full rated r value. Air space equals r value. The higher the r value the more resistant a material or building assemblage is to conductive heat transfer. If you don t provide air space this product provides almost no insulating value.

R value measures how well certain building insulation materials can resist heat. 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. A reflective insulation product is a thicker product with an insulating middle layer such as fiberglass foam or air bubbles.