Insulation: All Answers

Attic and ceiling insulation, spray foam, radiant barriers and quality installation. Pick the question closest to yours.

Attics and ceilings

1. Does an Attic Conversion Need Title 24?
2. Vaulted Ceiling Insulation Under the 2025 Energy Code
3. Cathedral Ceiling Insulation Under the 2025 Energy Code
4. Unvented Attic Title 24 Requirements
5. Attic Hatch Insulation and Gasket: What Title 24 Requires
6. Radiant Barrier Requirements Under Title 24
7. Recessed Lights Under Attic Insulation: IC-Rated, Airtight or Covered?
8. Attic Insulation Requirements for California Remodels
9. Attic Conversion to Living Space: Title 24 Requirements
10. Can a Radiant Barrier Replace Attic Insulation Under Title 24?
11. QII for Attic Insulation: Rulers, Baffles, Hard Covers and Weight Checks
12. Attic Insulation Certificate: What the Contractor Must Give You

Walls, floors and general

1. Which Wall Assembly Meets Title 24?
2. What Is Quality Insulation Installation (QII)?
3. Title 24 for an Older Home With Unknown Insulation
4. Title 24 Insulation Requirements for Homes
5. QII Wall Insulation Inspection: What the ECC-Rater Checks Before Drywall
6. Crawl Space Insulation Requirements Under Title 24
7. Raised Floor Insulation Requirements Under Title 24
8. Re-Siding a House: Does Title 24 Require Wall Insulation?
9. Re-Stuccoing a House: Does Title 24 Require Wall Insulation?

More answers

1. Air Sealing and the Air Barrier: What Title 24 Requires in a House
2. Is a Blower Door Test Required in California? Title 24 Air Leakage Testing

Back to Windows and Building Envelope, or see the full Title 24 guide.