Rigid insulation boards / Green Building & Sustainable Home Renovation Information & Advice

How much is Too Much Insulation in my Attic or Walls?
Insulation and soundproofing

How much insulation is too much in attics and walls?

...insulation is too much in an attic? What does ‘diminishing returns’ for insulation mean?  It's as simple as this - adding one inch of insulation to a wall that has only one inch of insulation is certainly well worth the investment, in any climate. Adding one inch of insulation to a wall that has 5 inches of insulation...