● ActiveHVHZ approvedLast checked Oct 21, 2026
Westlake Royal Citadel Plus Underlayment
Florida product approval and Miami-Dade NOA.
Check: Mid-ply tile underlayment only with a roof-covering NOA that lists it; not for recover and not to be left exposed over 30 days. HVHZ approval is from the Miami-Dade NOA; FL14317 is the statewide (non-HVHZ) approval.
FL #FL14317-R15
Miami-Dade NOA22-0929.05
NOA expires08/24/2027In 10 months
Approval details
- Manufacturer
- Westlake Royal Roofing · 7575 Irvine Center Drive, Suite 100, Irvine, CA 92618
- Category
- Roofing · Underlayment · SBS self-adhered, poly film face
- Approved in HVHZ
- Yes
- Deck type
- Wood (plywood 15/32 in. or plank), new construction
- NOA approved
- 04/20/2023 · replaces NOA 17-0406.03 (renewal)
Official documents
PDFMiami-Dade NOA 22-0929.05miamidade.govPDFFL14317-R15 PEER, Westlake Royal Roof Underlayments (non-HVHZ)floridabuilding.org
Verify on floridabuilding.org ↗Quick answers
What is the FL number for Westlake Royal Citadel Plus Underlayment?
FL14317 (HVHZ). The Miami-Dade NOA is 22-0929.05.
Is Westlake Royal Citadel Plus Underlayment approved in the HVHZ?
Yes, on wood (plywood 15/32 in. or plank), new construction decks. The NOA expires 08/24/2027.
Public record. Always verify on the official source before you permit.