When you trade your old carpet for new hardwood floors, would you expect your heating bill to go up, down, or stay the same?

I just glued down engineered maple floors on our concrete subfloor of our condominium. The floor is ontop of an open-air parking garage. It's our first year in this condo, so I don't have last year's data to compare it to. Floors went in in October and it feels like our heating bill took a big jump. Granted, temperatures outside also dropped, but is hardwood less insulating than, say carpet?

Thanks for sharing any experience.

It would depend on many things such as type and quality of the flooring, including the carpet and it's pad.