Close Menu
AZEK Trimboard Trim

AZEK® Flange Slotted Window Trim

Save Time Installing Window Trim

Typical window trims installed over a window nailing fin need to be shimmed or pulled back for the trim to lay flat. AZEK Flange Slotted Window Trim does not and is engineered to create beautiful, consistent, and long-lasting window surrounds by removing the installation challenges created by windows installed with a nailing fin. The relief milled into AZEK Flange Slotted Window Trim accommodates the window nailing flange for most common window surround profile for more efficient installation.

  • Saves time—no shimming needed
  • Maintains tolerances
  • Sealed edges on all sides
  • Available in smooth Traditional or woodgrain Frontier finish
  • Rabbeted and Standard profile

Guaranteed against:

  • Rotting
  • Splintering
  • Splitting
  • Delaminating
  • Swelling
  • Warping
Download BIM/Revit
Rabbeted Frontier Trimboard

Shown: Frontier

Finish Options


5/4 Window Flange Length Finish
Nominal 18' Traditional Frontier
5/4 x 4" Slotted
5/4 x 4” Slotted & Rabbeted
5/4 x 6” Slotted
5/4 x 6” Slotted & Rabbeted

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.

Learn more
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.

Learn more
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.

Learn more