You said you used MLV and foam and doubled up in some areas and that 1/2" was good in most areas. Can you clarify that? What thickness MLV and foam did you use? I did my entire car in B-Quiet butyl mat years ago and now I'm looking at adding either MLV and foam or just some foam. It's really pricey stuff and it would be nice to get a fairly accurate estimate of how much I'll need. I'd rather not end up with half of a several hundred dollar roll of material left over.