FL9777 – Owens Corning
Florida product approval FL9777-R21 for Roofing Products – Underlayments, as listed in ProdApproval’s data as of Sep 29, 2026.
- FL#
- FL9777-R21
- Manufacturer
- Owens Corning
- Code version
- 2023 Florida Building Code
- Status in our data
- Approved
- Products
- 5
Official record on floridabuilding.org →Use on a spec sheet →
Verify approval status on floridabuilding.org before submitting.
Approved products under FL9777-R21
| Approval # | Model | Description | Design pressure | Wind-borne debris | HVHZ | Outside HVHZ |
|---|---|---|---|---|---|---|
| FL9777.1 | Weatherlock G | Weatherproofing Underlayment | N/A | N/A | No | Yes |
| FL9777.2 | WeatherLock G (High Tear) | Weatherproofing Underlayment | N/A | N/A | No | Yes |
| FL9777.3 | Weatherlock MAT (HVHZ) | Waterproofing Underlayment | N/A | N/A | Yes | No |
| FL9777.4 | Weatherlock MAT (nonHVHZ) | Waterproofing Underlayment | N/A | N/A | No | Yes |
| FL9777.5 | WeatherLock Specialty Tile & Metal, Worth Luxury HT or Beacon Tribuilt High Temp Metal & Tile Underlayment | Weatherproofing Underlayment | +0/-172.5 | N/A | No | Yes |
Fill a spec sheet with FL9777
On the contractor form, go to the Roofing Products – Underlayments row and type 9777 in the Florida Product Approval # box to fill the row. Walton County users can print a PDF that follows the county’s sheet; see the Walton County Product Approval Specification Sheet guide.