Attic

3 articles

• Zone 5 Attic Insulation: The Target, the Depth, and the Top-Up Maths

  Zone 5 covers a large share of the country and sits right on the step where the code moved from R-49 to R-60. Which one applies to you is a local question.

• R-38 vs R-49 vs R-60: What Each Step Actually Removes

  Each step up removes less than the one before it. Knowing how much less is the difference between a sensible upgrade and buying insulation you will never notice.

• Attic R-Value by Climate Zone, and How Deep That Actually Is

  Everyone quotes an R-value target. Almost nobody tells you how many inches of the stuff you are actually buying that target comes to — and the answer ranges from seven inches to two full feet.