What is the best way to insulate your basement walls, there are so many different suggestions. 1.(foam insulation, vapour barrier, stud frame, rock) 2.(paint, vapor barrier, stud frame, pink insulation between studs, rock) & it goes on with a few alterations, so who has got the best idea. **But mostly I would like to know what do you do to seal up that void space at the top of the foundation and the (sill plate) floor joists to the outside wall. Is expanded foam or pink insulation the best to put in that void**.