Bubble Wrap Insulation R Value

By contrast 2 inches of extruded polystyrene insulation has an r value of 10.

Bubble wrap insulation r value.

During the winter bubble wrap can effectively protect your home or greenhouse against the cold penetrating inside and prevent heat from moving out. Some of the better manufactures state in fine print when you can find it the conductive r value of their products. 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 product. It does as you point out change the conductive properties.

Bubble wrap works as insulation because it raises your windows r value. Product description the reflectix r 8 0 duct insulation is a nominal 1 thick and consists of an outer reflective surface two layers of big bubbles in the center and a second outer reflective surface. How to install bubble wrap on windows. The product provides an r 8 0 when installed with a 0 75 air gap between the duct and the insulation and r 6 0 when installed direct to the duct without a spacer.

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. However we see claims of up to r 14 for some bubble products. A martin holladay editor of energy design update responds the r value of 3 8 inch thick foil faced bubble wrap is about 1 3. The r value of 3 8 inch thick foil faced expanded polystyrene foam is about 1 6.

After all the trouble of trying to keep the bubble wrap off the ducts the total r value would be 2 instead of 1 which may be insufficient to prevent condensation under some conditions. I have heard some say that the insulation could be installed loosely to maintain the gap. An r value is a measure of resistance to heat flow through a material s thickness. Worth mentioning to get the equivalent r value to what the manufactures claim on the packaging the installer has to use spacers under the insulation to keep the prescribed air gap between the ducts and the foil.

Most metallic bubble wraps are about an r 1. A single pane window has an r value of 8. Video library for addition videos. The higher the r value the less heat escapes.