Is your home energy-efficient? Is the indoor air quality healthy? There are clues that you can look for to help determine how your home performs. For instance, if you have to dust weekly, then you are probably breathing glass fibers from your insulation filter. I have heard for years from framers that you don’t want to build too tight. This is wrong with a minor clarification. Your home should be air tight with a controlled intake that goes through your Ventilation system. If you rely on ‘not too tight’ then you will waste money and suffer with poor indoor air quality.