Exhibit 21

GEORGIA GULF CORPORATION

Subsidiaries—As of March , 2010

Company Name |  | Jurisdiction of Incorporation
1. |  | Georgia Gulf Corporation |  | Delaware
2. |  | 1299239 Ontario Limited [HoldCo.] |  | Ontario
3. |  | 2069280 Ontario Limited |  | Ontario
4. |  | 6630987 Canada Inc. [Vaughan East] |  | Canada
5. |  | 6632149 Canada Inc. |  | Canada
6. |  | Advanced Profiles, S.A. de C.V. |  | Mexico
7. |  | Bluegrass Products, LLC |  | Delaware
8. |  | Dartmouth Extrusions Limited |  | Ontario
9. |  | Edificacion Tecnica Internacional S.A. de C.V. |  | Mexico
10. |  | Georgia Gulf Chemicals & Vinyls, LLC |  | Delaware
11. |  | Georgia Gulf Europe, ApS |  | Copenhagen, Denmark
12. |  | Georgia Gulf Lake Charles, LLC |  | Delaware
13. |  | Great River Oil & Gas Corporation (Acquired by Georgia Gulf Corporation on July 25, 1980) |  | Delaware
14. |  | Royal Window and Door Profiles Plant # 13 ((f.k.a.) Custom Window Extrusions)) |  | Pennsylvania
15. |  | Royal Window and Door Profiles Plant # 14 ((f.k.a.) King Extrusions) |  | Washington
16. |  | Le-Ron Plastics Inc. |  | British Columbia
17. |  | Novo Capital, Inc. |  | Nevada
18. |  | Novo Management Inc. |  | Nevada
19. |  | PHH Monomers, LLCMembers |  | Louisiana
20. |  | Plastic Trends, Inc. |  | Michigan
21. |  | RBS (U.S.A.) Limited |  | Delaware
22. |  | Rome Acquisition Holding Corp. |  | Nova Scotia ULC
23. |  | Rome Delaware Corporation |  | Delaware
24. |  | Royal Group Mexico S.A.de C.V. |  | Mexico
25. |  | Royal Group Sales (USA) Limited |  | Nevada
26. |  | Royal Group, Inc. |  | Canada
27. |  | Royal Mouldings Limited |  | Nevada
28. |  | Royal Outdoor Products, Inc. |  | Indiana
29. |  | Royal Plastics Group (U.S.A.) Limited |  | Delaware
30. |  | Royal Railings, LLC |  | Pennsylvania
31. |  | Royal Building Systems De Mexico, S.A. de C.V. |  | Mexico
32. |  | Royal Ventures Construction & Development, Inc. (in the process of being sold) |  | Philippines
33. |  | Royal Ventures Land Holdings Corp. (in the process of being sold) |  | Philippines
34. |  | Royal Vinylbilt Limited |  | Ontario
35. |  | Royal Window Coverings (USA) L.P. |  | Texas
36. |  | Royalguard, Inc. (Shell Co.) dissolving |  | Delaware
37. |  | Roybridge Financing Trust |  | Quebec
38. |  | Vinyl Solutions, LLC |  | Delaware