I recently replaced my old shredded carpet with much better condition OEM un-padded carpet. Installation went smoothly, however the carpet is loose around the footwell/doorsill areas. The dimensions are correct, however, once downward pressure is applied near the air ducting, it becomes loose and pulls away from the sill area.
Am I correct in assuming that installing a similar density foam underneath the OEM carpeting will correct this? If so, what type of foam would be best for this application?