Three-Piece Trimboard System

To help you finish window, door and other openings more quickly and neatly, CertainTeed now offers trimboard and J-Pocket trimboard with a grooved design similar to that of the one-piece ourside corner.

The trimboard system installation consists of (A) fastening the starter flange to the wall, (B) inserting the nail hem flange into the trimboard grooves and (C) fastening the trimboard system to the wall via the nail hem).

InvisiPro Installation System

See the complete Installation Guide (RM003) for additional details.

See our brochure for complete product offering.


For proper installation, using an appropriate PVC cement is critical especially for miter and scarf joints to help control expansion and contraction. We recommend Extreme PVC Trim Welder® or Partite® Adhesive. Our complete installation manual gives you the detailed instructions you need to help with proper installation.


Warranty Details

CertainTeed stands behind our Restoration Millwork® product with a 25-year limited warranty.

Sustainability Information

 Sustainability for a Lifetime

CertainTeed respects the environment through the responsible development of sustainable building products and systems.  CertainTeed cellular PVC Trim gives building professionals and homeowners confidence that the homes they design, build, maintain and occupy are made with sustainable materials that enhance every projects performance and beauty.

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