It does as you point out change the conductive properties.
Bubble insulation r value.
Double bubble insulation is the most effective bubble insulation with highest r value.
R 15 2 heat flow down r 8 5 horizontal heat flow.
Most metallic bubble wraps are about an r 1.
Are two layers of polyethylene industrialized air bubbles bonded between exterior.
Insulation ratings are measured in r values per inch of thickness.
However we see claims of up to r 14 for some bubble products.
The approximate r value of the air space would be about 1.
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.
All our reflective double bubble products.
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.
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.
Bubble and prodex total are both suitable for metal buildings pole barns homes attics roofs walls crawlspaces garages and more both are considered reflective insulation products provide r value a radiant and vapor barrier protection.
Insulation r values vary based on the type thickness and density of the insulation material.
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.
An r value tells you how well a type of insulation can keep heat from leaving or entering your home.
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.
Our double bubble products are ideal for metal buildings where the control of condensation is necessary.