Attic Insulation Depth and Coverage Calculator
Free insulation tool

Attic Insulation Depth and Coverage Calculator

Enter the attic size, the material and the depth you have now to see how much to add to reach your target.

These tools give planning-level estimates from typical values. They are not quotes, designs or engineering, and results depend on your actual materials, depths, access, local rules and conditions. Only a site visit can confirm what a project needs, and we give you a written scope and price before any work begins.

How it works

Four quick steps.

  1. 01

    Enter the attic size

    Length and width of the attic floor in feet.

  2. 02

    Pick the material

    Loose-fill fiberglass or cellulose.

  3. 03

    Enter the depth you have

    Measure in several spots and average.

  4. 04

    Read what to add

    Added depth and volume to plan for.

Tips

  • Measure the depth in several places, since attic insulation is rarely even.
  • Air seal before adding insulation so the new layer performs as designed.
  • Keep baffles at the eaves so the vents stay open.
Questions

About this tool.

Is this a materials list?

No. It is a planning estimate. We measure on site and calculate exact coverage.

How do I measure depth?

Use a ruler in several spots, away from stored boxes where the insulation is compressed.

What target should I use?

Check current local code and program guidance. Many owners aim above the minimum.

Free estimate

Ready to start your insulation project?

Call us and we will inspect the attic, walls and crawl space and give you a clear plan and a written scope.

Call NowFree Estimate