Window Replacement Title 24 Checklist
Sort the job first, write down your climate zone targets, get each window's NFRC numbers on the quote, match model and compass direction to the plans, leave the labels on until the inspector has seen them, seal the frame, and keep the signed installation certificate. Each step ties to a section of the 2025 Energy Standards.
- Choose your report
- Upload your plans
- Pay securely
- Permit-ready report by email
Before the order goes in
- Sort the job. New glass in the existing sash and frame is a repair. A new window in the same wall is an alteration, and extra glass is added fenestration. Replacing one window walks through the cases.
- Write down the targets. A same-area replacement meets U-0.27 (zones 1 to 5, 11 to 14 and 16) or U-0.30 (zones 6 to 10 and 15), with an SHGC of 0.23 in zones 2, 4 and 6 to 15. Up to 75 square feet of replaced glass may use U-0.40 and SHGC 0.35 instead, except that zone 15 stays at 0.23. Find your zone on the climate zone map.
- Ask for the NFRC figures in writing. A window with no rating is given a default that cannot reach those targets; the no-label case shows the numbers.
On the day
- Match model and direction. The installer confirms that maker, brand and model agree with the plans or energy forms, and notes the compass orientation of each unit on the installation certificate.
- Leave the labels on. The temporary label may not come off before the building department has inspected.
- Seal the frame. Section 110.7 requires openings in the envelope to be caulked, gasketed or weatherstripped, and the inspector looks at window sealing at the rough-frame visit, before insulation goes in.
- Keep the paperwork. The signed installation certificate stays on site, with copies to the owner and the enforcement agency, and the owner receives a warranty certificate of at least 10 years.
Whether the department wants a certificate of compliance at all is its decision; see the window replacement permit question. Installers can read the installer page, and our residential reports cover alterations. The usual mistake is ordering first and checking the NFRC numbers afterwards.
Common Title 24 Questions
- When is Title 24 required for a home?
- Does a remodel need Title 24?
- Does a room addition need Title 24?
- What plans are needed for a residential Title 24 report?
- How much does a residential Title 24 report cost?
- How long does a residential Title 24 report take?
Frequently Asked Questions
No field test is described for windows. The manual has the inspector compare the label values with the compliance documents at the rough-frame visit.
The installer or responsible party completes it and signs the declaration. A signed copy stays at the job site and one goes to the owner and the enforcement agency.
Explore Windows and Doors
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View all Windows and Doors guides → · Windows and Building Envelope · Title 24 guide