| FL12398 | Krestmark Industries | WindowsSingle Hung | ReadyFL12398-R15: Approved | No |
| FL13195 | Krestmark Industries | WindowsFixed | ReadyFL13195-R9: Approved | No |
| FL13418 | Krestmark Industries | WindowsHorizontal Slider | ReadyFL13418-R8: Approved | No |
| FL17148 | Krestmark Industries | WindowsFixed | ReadyFL17148-R7: Approved | No |
| FL17660 | Krestmark Industries | WindowsSingle Hung | ReadyFL17660-R6: Approved | No |
| FL43938 | Krestmark Industries | WindowsHorizontal Slider | ReadyFL43938-R2: Approved | No |
| FL47517 | Krestmark Industries | Exterior DoorsSliding Exterior Door Assemblies | ReadyFL47517-R1: Approved | No |
| FL21853 | L.K. Aluminum | RoofingProducts Introduced as a Result of New Technology | ReadyFL21853-R4: Approved | Yes |
| FL16667 | L.V. Thompson, Inc. dba Thompson Architectural Metals Company (TAMCO) | RoofingMetal Roofing | ReadyFL16667-R9: Approved | Yes |
| FL16918 | L.V. Thompson, Inc. dba Thompson Architectural Metals Company (TAMCO) | RoofingRoofing Accessories that are an Integral Part of the Roofing System | ReadyFL16918-R9: Approved | Yes |
| FL17834 | L.V. Thompson, Inc. dba Thompson Architectural Metals Company (TAMCO) | RoofingRoofing Accessories that are an Integral Part of the Roofing System | ReadyFL17834-R4: Approved | Yes |
| FL9103 | LP Building Solutions | Panel WallsSoffits | ReadyFL9103-R9: Approved | Yes |
| FL9190 | LP Building Solutions | Panel WallsSiding | ReadyFL9190-R13: Approved | Yes |
| FL38694 | LP Building Solutions | Panel WallsSiding | ReadyFL38694-R3: Approved | Yes |
| FL10980 | La Cantina Doors, Inc. | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL10980-R11: Approved | No |
| FL17104 | La Cantina Doors, Inc. | Exterior DoorsSliding Exterior Door Assemblies | ReadyFL17104-R8: Approved | No |
| FL41700 | La Cantina Doors, Inc. | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL41700-R2: Approved | No |
| FL46788 | La Cantina Doors, Inc. | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL46788-R4: Approved | No |
| FL47901 | La Cantina Doors, Inc. | WindowsFixed | ReadyFL47901-R1: Approved | Yes |
| FL15898 | Lag Design of Florida | WindowsFixed | ReadyFL15898-R5: Approved | Yes |
| FL15916 | Lag Design of Florida | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL15916-R5: Approved | Yes |
| FL15919 | Lag Design of Florida | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL15919-R5: Approved | Yes |
| FL46764 | Lanco & Harris Paint Corporation | RoofingCements-Adhesives-Coatings | ReadyFL46764-R1: Approved | Yes |
| FL7989 | Lansing Building Products, Inc. | ShuttersStorm Panels | ReadyFL7989-R12: Approved | Yes |
| FL34537 | Lansing Building Products, Inc. | RoofingMetal Roofing | ReadyFL34537-R2: Approved | No |
| FL37637 | Lennox Industries | Structural ComponentsProducts Introduced as a Result of New Technology | ReadyFL37637-R5: Approved | Yes |
| FL47035 | Lindsay Windows, LLC | WindowsFixed | ReadyFL47035-R2: Approved | No |
| FL47036 | Lindsay Windows, LLC | WindowsSingle Hung | ReadyFL47036-R2: Approved | No |
| FL48128 | Lindsay Windows, LLC | Exterior DoorsSliding Exterior Door Assemblies | ReadyFL48128-R1: Approved | No |
| FL10838 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL10838-R8: Approved | No |
| FL14367 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL14367-R7: Approved | Yes |
| FL14369 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL14369-R10: Approved | Yes |
| FL14370 | Loewen Windows | WindowsFixed | ReadyFL14370-R8: Approved | Yes |
| FL14386 | Loewen Windows | WindowsFixed | ReadyFL14386-R9: Approved | No |
| FL14603 | Loewen Windows | WindowsMullions | ReadyFL14603-R7: Approved | No |
| FL14692 | Loewen Windows | WindowsDouble Hung | ReadyFL14692-R9: Approved | Yes |
| FL14693 | Loewen Windows | WindowsSingle Hung | ReadyFL14693-R9: Approved | Yes |
| FL14694 | Loewen Windows | WindowsFixed | ReadyFL14694-R8: Approved | Yes |
| FL14695 | Loewen Windows | WindowsFixed | ReadyFL14695-R7: Approved | Yes |
| FL15302 | Loewen Windows | WindowsAwning | ReadyFL15302-R8: Approved | No |
| FL15303 | Loewen Windows | WindowsCasement | ReadyFL15303-R7: Approved | No |
| FL15304 | Loewen Windows | WindowsFixed | ReadyFL15304-R8: Approved | No |
| FL15395 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL15395-R8: Approved | No |
| FL15397 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL15397-R9: Approved | No |
| FL15399 | Loewen Windows | WindowsFixed | ReadyFL15399-R10: Approved | No |
| FL15434 | Loewen Windows | Exterior DoorsSliding Exterior Door Assemblies | ReadyFL15434-R7: Approved | No |
| FL15772 | Loewen Windows | WindowsDouble Hung | ReadyFL15772-R9: Approved | No |
| FL17221 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL17221-R7: Approved | No |
| FL19332 | Loewen Windows | WindowsMullions | ReadyFL19332-R4: Approved | Yes |
| FL29105 | Loewen Windows | Exterior DoorsSwinging Exterior Door Assemblies | ReadyFL29105-R4: Approved | No |