Polyethylene foam as insulation
Hi! I’m beginning a new project building out a small camper van for use in cold climates primarily. Because its a small space I’m extra concerned about the safety / toxicity of materials that I’m using. The walls of the van are aluminum so condensation in cold climates is going to be a real issue. I know that laying some type of insulation that doubles as a vapor barrier is my best option to preventing any sort of mold issues. However, when looking at my options for materials I’m not thrilled. Most of the foams used in the building industry from XPS, Polyiso, etc. seem to have questionable health safety red flags in terms of offgassing or fire retardant additives. More eco friendly options such as wool, or denim don’t solve the vapor permeability issue…
I have come across polyethylene foam though as a potential option however (the kind of foam used to make swim noodles) and I was wondering if anyone had any positive or negative experiences with the material or maybe knows something I don’t regarding its suitability as insulation or potential toxicity issues I have overlooked.
If polyethylene doesn’t work, I will probably go with expanded cork insulation….expensive, but affordable due to small dimensions of space I am insulating.
Thanks to any and all who have any input regarding this!
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