Reflective Insulation R Value

The higher the r value the more resistant a material or building assemblage is to conductive heat transfer.

Reflective insulation r value. The rubber meets the road on reflectix s website where it says no air space no reflective insulation benefit. In reflective insulation the r value refers to a measure of the insulation s resistance to heat flow. Install it anywhere from the roof to the foundation. Any additional r value is achieved by the use of dead air spaces around the reflective product or in used in conjunction with other mass insulation products like fiberglass foam etc.

A simulated wall with 2x4 studs dry wall an air space and layer of reflectix. What about r values for a reflective insulation and why do they vary with application. Rigid foam insulation also known as insulating boards provide high r values. Measuring the r value of reflective insulation vs.

Although it is possible to calculate an r value for a specific radiant barrier or reflective insulation installation the effectiveness of these systems lies in their ability to reduce heat gain by reflecting heat away from the living space. Air space equals r value. It is the m easurement of a material s ability to stop heat transfer. 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.

An r 1 1 is provided from the product itself for the reflective double bubble material. You can even place it under the foundation slab. Reflectix can provide verification for all r values stated for all products and applications. Standard insulation is tested as a material with an r value per inch of thickness for example r 13 for 3 5 quot.

If you don t provide air space this product provides almost no insulating value. Most people are familiar with the term r value when discussing insulation properties. If two products have the same r value they have the same efficiency in stopping heat transfer. In contrast reflectix is always tested as part of an assembly e g.

Notes on the r value k values of different forms of asbestos. The amount of insulation or r value you ll need depends on your climate type of heating and cooling. An r value is a measure of an insulation product s resistance to thermal heat transfer. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal.

Select 2 to 4 items to compare. Notes to the table above. R values for reflective insulations are dependent. Of owens corning fiberglass and r 5 per inch with foamular foam board.