Insulation Installer how-to

How to Install Wall Batts Without Gaps

Gaps waste energy.

Updated By the Career Education Institute Curriculum Team
Quick answer

Gaps waste energy. In short: cut; fill; split, then complete the remaining steps below.

Step by step

  1. Cut batts to fit.

  2. Fill cavities fully.

  3. Split around wires.

  4. Cut around boxes.

  5. Don’t compress.

  6. Check coverage.

Safety reminders for insulation installers

  • Wear respirators
  • Stay on joists in attics
  • Prevent heat stress
  • Avoid live wires

R-value · Batt · Blown-in · Cellulose · Spray foam · Air sealing: see the full insulation installer glossary.

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