AZEK Cornerboard Trim

Rabbeted Cornerboards

Smooth Corners, Seamless Transitions,
Easier Installations

With rabbeted edges, this one-piece cornerboard is designed to make siding installations a breeze and help deliver a crisp façade. 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.

Rabbeted Frontier Cornerboard Trim

Shown: Frontier - Rabbeted

Finish Options

Rabbeted Cornerboard

5/4 X Thickness
Nominal Inside Dims 10' 20'
5/4 x 4" x 4" 1″ x 3 ½″ x 3 ½″
5/4 x 6" x 6" 1″ x 5 ½″ x 5 ½″
5/4 x 8" x 8"* 1″ x 7 ¼" x 7 ¼'

* 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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