I agree that the Reflectix website is a real pain to navigate. Some of their competitor's sites are even worse.
I understand that it is the internal air gap that is providing the insulation - but my issue is that Reflectix says that will provide only R1.1 per layer without that air gap on the external side. That doesn't seem like much insulation at all. To get R15 you would need to sandwich about 13 layers together. Yet many folks report good results. Does just R1.1 or so really satisfy them or is there something else in the construction process that I don't understand?
That's why I am so interested in hearing from people who have actual experience with Reflectix and another insulation type in these moulded fiberglass trailers.
I'm glad you are cozy in your Scamp
, and I think that your making reflectix covers for the windows
is exactly how Reflectix should be used. The reflective interior surface reflects heat back into the trailer rather than letting it out the windows
I have a similar issue with the R-values quoted for the 3mm cork underlayment. Cork seems to have an R-value of 2-4 per inch (lots of variation due to veins, etc. running through it) depending on the source. I fail to understand how 3mm can provide R-3. I expect that the foam matrix used to bind the cork particles helps (but foam only goes up to about R-7 per inch) and the fact that it acts as a vapour barrier probably helps as well. In any event, while I have problems with the claimed R-value, I know from personal experience that a floor doesn't seem as cold when these products are used.