I’ve been a Costco member for over 20 years. I love Costco and have purchased from Costco.com as well as in their stores. We looked into the eShield product and ultimately bought it. K-Designers came to our home and made a presentation. They asked us to buy that day, as we expected, we just told them “NO, for now”, “We'll have to get back to you” and that was fine with them.
Rather than going ahead with the project we elected to wait to do some research. We discovered an incredible amount of misinformation, misleading and outright deceptive advertising all over the internet. Ultimately though, we found very good information on the US Department of Energy (DOE) website. There we found details for aluminum radiant barriers (clearly NOT the same product) and Reflective Insulation. According to the DOE typical radiant barriers are primarily effective in the summer months only. Also typical Radiant Barriers don't "breath" -- they have a tendency to trap moisture which of course negates any benefit. Elsewhere there are reports of cases where moisture condensed and froze on the surface of the radiant barrier, and then later (when the temperature rose) the frozen condensation melted then damaged insulation and other parts of homes.
When we asked if this was a problem with eShield we found out that eShield is Reflective INSULATION that has microscopic perforations which allow the product to breathe so moisture and condensation are never an issue. The more research we did the more we discovered that Reflective Insulation is the way to go regardless of climate. Yes, it is slightly more effective in the summer: however, when eShield is properly installed it is very effective in the winter too.
By reading the entire DOE articles carefully they clearly differentiate between the two different types of materials: 1) Radiant Barriers and 2) The more effective product, called REFLECTIVE INSULATION. See the DOE website article --
See also YOU TUBE for more info...
We decided that we only wanted to do this job once – so we wanted the right product and the work done right. The more we discovered about the eShield product the more convinced we became that eShield was the right product for us -- so we bought it and we're happy we did. Our home is more comfortable and our energy consumption is lower. We are completely satisfied with Costco and K-Designers. They treated our home and property with respect. Their workers wore booties in the living space of our home and left our home as neat and clean as the moment the arrived. Our experience couldn't have been any better!
Do your own research and consider your own home -- one word of caution though... this work is best left to professionals, I don't recommend trying to do it yourself.