Our friends have an older trailer that does not have the 'arctic' package. Our 2017 Laredo does have the arctic package and I most certainly can tell a difference in comfort when the temps are low. As for the foam it helps keep out cold air and keeps the little bit of warm air in along with rodent proofing. Not to worry. NOW, if you notice where it has been CUT and patched with tape then they had to access something to possibly repair it. Things happen and there may come a day when YOU have to have it cut open to access a tank valve or something else.