IMO, w/o any real data or calculations to support I'm thinking that unless you live in Antarctica, you can store your records on an outside wall w/o fear of any damage due to cold. I really don't think you need to paste cardboard on your walls. Not to mention the damage the cold will do to you when you end up sleeping outside.
record storage question
I want to install shelving along an outside wall to hold my LP's and CD's. Will the back of the LP's get too cold? Is this detrimental to the records being colder on one half? Thanks in advance. Joe