In your handbook you explain the difference between a reflective insulation and a radiant barrier essentially being that with the former, the foil is facing an enclosed air space, whilst with the latter the foil is facing an open-air space. Both systems are recommended for use in walls. My first question is, which system is most effective in a wall situation? Why can we only give an R-Value to the reflective insulation situation, and not the radiant barrier situation?
I am building a new home in Scottsdale, Arizona. My general contractor is suggesting a radiant barrier for the attic and the entire wall perimeter of the house. I can find lots of information on the benefits of radiant barriers in the attic, but nothing for the walls. Can you help me understand if there is any benefit to wrapping the entire house?
We had someone come out to our home to quote installation of a reflective barrier. Is it okay to staple the barrier to the floor?
I have read your bulletins on the emittance and reflectance of aluminum exposed to air, but I did not see any exact numbers for both. Most importantly, I’m wondering what the numbers look like of aluminum foil that has been in service for several years and whether coated or uncoated aluminum foil will perform best for a long time?
I am installing vinyl siding and intend to install radiant barrier on the plywood prior to installing the siding. Will the air space that will be created by the siding itself (which appears to be about 5/16 to 3/8 of an inch) be sufficient for the radiant barrier to be effective? How much air space is required and is there an optimal amount of air space?
I have converted a barn to an in-law apartment. I was thinking of using the double bubble reflective material as my only form of insulation. I live in CT where days in January can stay in the single digits and nights be as much as 15 below zero.
I am about to install a heat barrier for my house in San Antonio, TX. Which is better, the roll or the paint? I read where I would need a perforated foil, due to condensation.
Should spray foam insulation be applied directly to the underside of a roof that has used OSB with a radiant barrier (combo type product)? If it has already been done, should the builder and insulation installer have known better? Should the foam be removed?
Would the R-Value of the insulation be devalued if spray foam was already sprayed onto the underside of the roof and the decking as the radiant barrier is already attached? Besides the wasted money of the radiant barrier, what other negatives are there?
I have some extra strips of Enerflex radiant barrier that I would like to wrap around my AC line running from my compressor up to the condenser in the attic which already has a foam type (Armaflex) insulation over it. Also, I have some spots with the same situation with my water heater. I know radiant barrier works good over fiberglass, but will it work over closed cell foam? I will have to wrap it tightly and there will be some overlapping of the radiant barrier.