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How Far Should Insulation Supports Be Spaced Apart?

When installing batts or rolls of insulation below a floor or in a ceiling above, using insulation supports is a good idea. The standard suggestion is 36 inches apart. The wire supports should be fastened across the batt of insulation and tightly attached to the support beams.


Standard Spacing is 36 Inches

When installing batts or rolls of insulation below a floor or in a ceiling above, using insulation supports is a good idea.  The standard suggestion is 36 inches apart.

The wire supports should be fastened across the batt of insulation and tightly attached to the support beams. 


Steep Roofs Require More

For insulation under an extremely steep roof, 36-inch spacing still may allow sagging of roll insulation.  In these cases, experts suggest 24 inches or even closer spacing of insulation supports.


Bottom Line

For a standard installation, such as in a crawl space, using supports every 36 inches is fine.  Use more supports for steep roofs.

About the Author

Rachel Murdock published her first article in "The Asheville Citizen Times" in 1982. Her work has been published in the "American Fork Citizen" and "Cincinnati Enquirer" as well as on corporate websites and in other online publications. She earned a Bachelor of Arts in journalism at Brigham Young University and a Master of Arts in mass communication at Miami University of Ohio.