Mylar Insulation R Value

See also material data sheet msds 1511 or msds 1911.

Mylar insulation r value.

What is the r value or r rating of radiant barrier foil insulation. The reason it is sometimes called the summer r value is because in summer you want to keep the heat out. An r 1 1 is provided from the product itself for the reflective double bubble material. Insulation companies who make metallic bubble wrap or their distributors like to boast about their products attributes and often add the equivalent reflective r values to the conductive values giving an overall equivalent r value.

Foam board insulation types. Notes to the table above. The higher the r value the more resistant a material or building assemblage is to conductive heat transfer. 2 stated thermal resistance values are based upon conditioning requirements and test methodology found in astm c1289 and astm c518 for foil faced polyisocyanurate insulation.

R values for reflective insulations are dependent. The information on this page is based on data considered to be true and accurate based on periodic internal. Conductive heat will only pass through a solid object or several objects that are. 1 when joints penetrations detailed appropriately.

A tennessee valley authority study based on radiant barriers used in the summer found that. 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. Some products say r4 r6 or r8. What about r values for a reflective insulation and why do they vary with application.

R value is a term to describe how quickly heat will pass through or be absorbed by a product. If you don t provide air space this product provides almost no insulating value. The down r value also known as the summer r value is a measurement of an insulation s ability to resist heat flow from coming into the house. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold. Air space equals r value. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. This testing to designate an r value only applies to conductive heat flow not radiant heat flow.

Reflectix can provide verification for all r values stated for all products and applications. Notes on the r value k values of different forms of asbestos. In summary you increase the r value of your existing insulation by installing a radiant barrier foil insulation product. The rubber meets the road on reflectix s website where it says no air space no reflective insulation benefit.

The down r value.