Small windows are one option. Multiple panes of glass with air gaps inbetween so there is insulation are another option. I hope that regulators will look to R

Small windows are one option. Multiple panes of glass with air gaps inbetween so there is insulation are another option. I hope that regulators will look to R-value equivalents and not to how they think those R-values should be achieved. I am curious, what does tile floor do to help insulate a home? I would have expected carpet to insulate better.