FA Exhibit DET-021

Skylight swap: plastic dome vs multipane tempered glass

Two NTS curb sections compare thermoplastic dome glazing with an IBHS Plus multipane glass option having at least two tempered panes. A source-status strip distinguishes FEMA guidance, Oregon code options, and the IBHS voluntary standard. — FA Exhibit DET-021. Plastic skylight dome versus multipane tempered glass. SOURCES · FEMA P-737 §4.5 (2025) · 2023 ORSC R327.3.6 · IBHS WFPH Plus §3.1.5 (2025) · U.S. patent geometry records. Illustrative — not a construction document. Verify with your building official. CC BY 4.0.

Technical review: Grayson Graham. Last verified 2026-08-25. JSON

Copy this embed

<img src="https://fireapproved.com/diagrams/det-021-skylight-plastic-vs-multipane.svg" alt="Two NTS curb sections compare thermoplastic dome glazing with an IBHS Plus multipane glass option having at least two tempered panes. A source-status strip distinguishes FEMA guidance, Oregon code options, and the IBHS voluntary standard." />

Canonical URL: https://fireapproved.com/diagrams/det-021/