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AZEK Cornerboard Trim

AZEK® Cornerboard

AZEK Cornerboard is now available in PaintPro Technology

A Seamless Transition from Siding

With seams that will not open, AZEK® Cornerboards offer faster and more aesthetically pleasing installations to complement any home exterior. Unlike the two-piece cornerboards in the marketplace, which attract dirt in the seam, our one-piece cornerboards feature smooth outside edges to keep dirt away and help prevent cuts during installation.

Enjoy the beauty and benefits of AZEK Cornerboard:

  • Stands up to harsh weather
  • Resists stains, scratches, and fading
  • Quick and easy installation
  • Resists mold, mildew, and moisture damage
  • No cupping, rotting, or splitting
  • Suitable for ground contact
  • UV protection inside and out
  • Does not require paint for protection, but easily accepts paint
  • Same color, look, and feel as AZEK Moulding
  • Covered by a Lifetime Limited Warranty
  • Available in White in Traditional and Frontier finishes
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Frontier Cornerboard Trim

Shown: Frontier

Finish Options


Nominal Actual Dimensions 10' 20'
5/4 x 4” x 4” 1” x 3½” x 3½”
5/4 x 6” x 6” 1” x 5½” x 5½”
5/4 x 8” x 8”* 1” x 7¼” x 7¼”

* 5/4 x 8” x 8” only available in Traditional

Frequently Asked Questions

Do I need to paint AZEK® Trim?

No. AZEK® Trim products do not require paint for protection, but may be painted to achieve a custom color or to cover nail holes that have been filled. If you choose to paint, use 100% acrylic latex paint with an LRV of 55 or higher.

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Does AZEK® Trim come in colors?

No, AZEK® Trim products are manufactured in a matte white finish only, but can be painted to achieve a custom color. Please refer to the painting section in our Trim Installation Guidelines.

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What can I use to clean AZEK® Trim?

Depending on degree of cleaning needed, power wash or hose loose dirt off of the trim board. If using a power washer, be sure to test the pressure setting and nozzle first to ensure that the surface of the trim will not be damaged. Other cleaning methods include using a soft cloth and a mixture of mild detergent.

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