**Exhibit 21**

**SUBSIDIARIES OFTHE REGISTRANT**

| Subsidiary                                       | ** ** | ** **   | ** ** | **Jurisdiction** |
|--------------------------------------------------|------------|--------------|------------|------------------|
| Georgia Gulf Chemical  & Vinyls, LLC         |       | Delaware     |
| Georgia Gulf Lake  Charles, LLC                  |       | Delaware     |
| Great River Oil &  Gas Corporation           |       | Delaware     |
| GGRC Corporation                                 |       | Delaware     |
| Georgia Gulf Europe,  ApS                        |       | Denmark      |
| PHH Monomers, LLC                                |       | Delaware     |
| Vinyl Solutions, LLC                             |       | Delaware     |
| Rome Delaware  Corporation                       |       | Delaware     |
| Rome Acquisition  Holding Corporation            |       | Nova Scotia  |
| Royal Group, Inc.                                |       | Canada       |
| Royal Group Mexico S.A.  de C.V.                 |       | Mexico       |
| Royal Building Systems  de Mexico, S.A. de C.V.  |       | Mexico       |
| Edificacion Technica  International S.A. de C.V. |       | Mexico       |
| Advanced Profiles, S.A.  de C.V.                 |       | Mexico       |
| Royal Vinylbilt Limited                          |       | Ontario      |
| Domken Plastics Limited                          |       | Ontario      |
| Vision Profiles Limited                          |       | Ontario      |
| Liberty Plastics  Limited                        |       | Ontario      |
| Maine Ultimate  Extrusions Limited               |       | Ontario      |
| Vinyl Concepts Inc.                              |       | Ontario      |
| Dartmouth Extrusions  Limited                    |       | Ontario      |
| RoyCom Limited                                   |       | Manitoba     |
| Le-Ron Plastics Inc.                             |       | Canada       |
| Royal Concrete Encased  Technologies Inc.        |       | Ontario      |
| 6632149 Canada Inc.                              |       | Canada       |
| 6630987 Canada Inc.                              |       | Canada       |
| Royal Andina Colombia                            |       | Colombia     |
| Royal S.A. Colombia                              |       | Colombia     |
| 1299239 Ontario Limited                          |       | Ontario      |
| 1260392 Ontario Limited                          |       | Ontario      |
| Royal Plastics Group  (USA) Limited              |       | Delaware     |
| Novo Management, Inc.                            |       | Nevada       |
| Novo Capital Inc.                                |       | Nevada       |
| Royal Window Coverings  (USA) LP                 |       | Texas        |
| Royal Sierra Extrusions  Inc.                    |       | Nevada       |
| Royal Crown Limited                              |       | Indiana      |
| Royal Railings, LLC                              |       | Pennsylvania |
| Plastic Trends, Inc.                             |       | Michigan     |
| King Extrusions Limited                          |       | Washington   |
| Roybridge Investment  (USA) Limited              |       | Delaware     |
| Bluegrass Products, LLC                          |       | Delaware     |
| Royal Group Sales (USA)  Ltd                     |       | Nevada       |

 

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| Royal Mouldings Limited       |   | Nevada       |
|-------------------------------|--------|--------------|
| Custom Window Extrusions Inc. |   | Pennsylvania |

 

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