Double Bubble Reflective Foil Insulation R Value

Standard insulation is tested as a material with an r value per inch of thickness for example r 13 for 3 5 quot.

Double bubble reflective foil insulation r value.

All our reflective double bubble products. Bubble foil does offer some r value because of the bubbles because remember radiant barrier does not have an r value on its own. If the product is simply doubled with no air space between the layers a very minimal benefit is obtained r 1 1 per layer for the reflective double bubble. Key benefits of this foil faced double bubble include.

So by that logic if you wrap ducts with the double bubble foil then you would have your r 6. R value is roughly 6 8 when used in a wall. A simulated wall with 2x4 studs dry wall an air space and layer of reflectix. In contrast reflectix is always tested as part of an assembly e g.

Double bubble insulation provides the maximum efficiency and highest r value for bubble insulation. For exact specifications per application contact the vendor. Of owens corning fiberglass and r 5 per inch with foamular foam board. Generally the following values are a good.

With multiple layers of product and airspaces between each layer enhanced performance will be gained. If you install 2 layers of a reflective insulation does the r value double. Insulation s r value is a measurement how much resistance against conduction. R value is roughly 5 3 when used in a floor.

If you read the fine print this rating is always achieved as part of an overall assembly which usually includes a lot of dead air spaces. The r value is dependent upon the type of application used. The foil face bubble wrap manufacturers may have a fantastic product but they unfortunately market their product to an industry that is unaware of codes that restrict its use. The r value of foil faced bubble wrap is about one.

Double the bubbles for double the airspace. Convection mass air transport conduction by touch radiation. The main one in the latter category is foil faced bubble wrap sold as insulation. 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.

Any bubble insulation that is approximately thick can only achieve an average r value of 1 to 1 5 on its own. However we see claims of up to r 14 for some bubble products. Heat moves by 3 methods. The r value of an assembly that includes foil faced bubble wrap could be significantly higher.

R value is roughly 10 6 when used in a ceiling. If you are. The more airspace in the product the better it is at slowing heat transfer.