Foil Bubble Wrap Insulation

The shiny aluminum surface on reflectix bubble wrap.

Foil bubble wrap insulation.

Since the product often costs more per square foot than 1 inch thick rigid foam rated at r 5 why would anyone use bubble wrap as insulation. I have heard some say that the insulation could be installed loosely to maintain the gap. Looking at the table of insulation values bubble wrap and foil will have limited benefit on reducing heat loss. The main one in the latter category is foil faced bubble wrap sold as insulation.

The metalized foil in under slab insulation is sandwiched between a layer of polyethylene bubbles on each side to protect it. Thd sku 469837. Foil faced bubble wrap insulation makes an excellent thermal barrier barrier for methane radon moisture termites and other pests thermal resistance in a 3 5 cavity. The purpose of the insulation is to make it nicer to work in and also to prevent tools rusting.

This is the only product that we sell that is rated for use under concrete slabs. Double bubble reflective foil insulation 36 inch x 125 ft roll industrial strength commercial grade no tear radiant barrier wrap for weatherproofing attics windows garages rv s ducts more. Between joist insulation between joist insulation is made from the same material as our top selling double bubble product. Double reflective insulation r values range from r 3 7 to r 17.

First a radiant barrier is the key part of reflective insulation e g. Most brands of foil faced bubble wrap are only 3 8 inch thick or less and have an r value of only 1 0 or 1 1. Reflective insulation is tested in the same manner as fiberglass and foam products and in wall and floor systems provides a year around r value benefit quot. The r value of foil faced bubble wrap is so low that it has few if any advantages over rigid foam.

Reflectix 4 ft. No mess no itchy fibers. R values depend on application. 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. There is no question that lining the shed with a sheet material will cut out on draughts and reduce heat loss. R 15 2 heat flow down r 8 5 horizontal heat flow. 4 6 out of 5 stars 407.

Class a class 1 fire rating. They presented the pros and cons and gave anecdotal evidence of this product having solved condensation problems.