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FL17840: National Gypsum Company a dba of National Gypsum Services Company, Roofing Insulation
2026 code statusReady
FL17840-R5 is listed as Approved under code version 2026.
Last checked against floridabuilding.org: Oct 19, 2026, 11:30 AM ET. See the state record.
Filing record
- 2026 application
- FL17840-R5, Approved (Revision) · state record
- 2023 code approval
- FL17840-R4, Approved · state record
- Submitted
- Jul 28, 2026
- Validated
- Jul 28, 2026
- Approved
- Jul 29, 2026
- Approved for HVHZ
- Yes
- Impact resistant
- No
- Compliance method
- Certification Mark or Listing
- Validated by
- Zachary R. Priest, P.E.
Products under this number (3)
| # | Model / description | HVHZ | Impact |
|---|---|---|---|
| 17840.1 | DEXcell Cement Roof Board cementitious roof board with fiberglass mesh | Yes | N/A |
| 17840.2 | DEXcell FA Glass Mat Roof Board Glass mat faced gypsum roof board | Yes | N/A |
| 17840.3 | DEXcell Glass Mat Roof Board coated glass mat faced gypsum roof board | Yes | N/A |
Standards cited
ASTM C 1177 2024; ASTM C 1325 2021
Miami-Dade NOAs, same maker
Matched by company name. The state doesn't link NOAs to FL numbers.
| NOA | Description | Expires |
|---|---|---|
| 25-0722.11 | DEXcell FA Glass Mat Roof Board, DEXcell Glass Mat Roof Board and DEXcell Cement Roof BoardUnselected / Unknown, +0/−0 psf | June 18 2031 |
Verify FL17840 on floridabuilding.org before you rely on it for a permit. Spot an error? info@flapprovalwatch.com
Other National Gypsum Company a dba of National Gypsum Services Company numbers
- FL18389 ReadyStructural Wall
- FL18399 ReadyExterior Insulation Finish System
- FL39860 Not yetExterior Insulation Finish System
All National Gypsum Company a dba of National Gypsum Services Company FL numbers
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