Insulation and soundproofing
Does a home need a radiant barrier in walls and ceilings? When is it worth it?
...energy savings of a radiant barrier may be somewhere in the range of about 8% to 10% of a home’s total cooling costs. There are no figures we've found for walls, but as they do not often absorb the same amount of radiation as a roof, the benefits are significantly reduced.
In cold climate zones such as the northern US...