How to Install Fire Rated Gypsum Board: Layering, Joint Treatment and Inspection Checklist Correct fire rated gypsum board installation is a discipline of sequence and detail. A tested assembly loses its rating when layers are not staggered, fasteners are under-specified, or perimeter joints are left open — even though the correct board was used. Step 1 — Confirm the Tested Design Before Starting Before any panel is fixed, confirm in writing: board type and thickness, number
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