Azek Base Post Trim

$19.99 - $39.99
Ships in 1-3 days
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Azek Post Trim by Nantucket


  • Material: Azek, made from PVC

  • 19 different sizes to choose from: 

    • 3-1/2” x 3-1/2”

    • 3-1/2” x 5-1/2”

    • 3-3/4” x 3-3/4”

    • 4” x 4”

    • 4” x 6”

    • 4-1/2” x 4-1/2”

    • 4-3/4” x 4-3/4”

    • 5” x 5”

    • 5-1/2” x 5-1/2”

    • 5-3/4” x 5-3/4”

    • 6” x 6”

    • 6-1/2” x 6-1/2”

    • 7” x 7”

    • 7-1/2” x 7-1/2”

    • 8” x 8”

    • 8-1/2” x 8-1/2”

    • 9” x 9”

    • 9-1/2” x 9-1/2”

    • 10” x 10”

  • Measurements:

    • *all trim are 1/16” larger than the size ordered

    • Custom sizes available; call 866-781-5033


  • 2-piece base post trim, three of the sides joint together (quantity = 1)

Not included:

  • Paint finish

Why is paint important for this product?

  • Azek doesn't have a finish, leaving the material subject to dirt, smudges, mold, and mildew.

  • A properly painted finish will last for years, protecting the substrate from mold, mildew and UV rays.

  • Properly prepared and painted with even brush strokes gives it the appearance of finely painted wood.

  • Use a 100% acrylic latex paint with colors having a Light Reflective Value (LRV) of 55 or higher.

  • Surfaces must be clean, dry and void of any foreign material such as dirt, oil, grease or other contaminants that may come from normal handling, storage and/or installation prior to painting.

*Azek products must be painted prior to being installed or they will discolor and void the warranty.

More details:  

  • Click HERE for Azek care 

  • Made in USA

  • Easy installation

  • Moisture and insect repellent 

About this product…

Post trims are pieces of material that wrap around the bottom of your beams or balusters in order to bridge the gap between your columns and your decking. Post trims can offer more cohesion or an aesthetically pleasing transition from the materials of your columns to the materials of your decking. These products are made from azek, offering an option that provides the look and feel of real wood without any of the maintenance. For an extra layer of protection and for aesthetic customization, you are strongly encouraged to coat the post trim in a stain or paint. 

Azek is a fantastic material to use for a deck post trim, as PVC is naturally resistant to insects and moisture. Since Azek doesn’t contain any wood or wood by-products, its boards don’t absorb moisture that typically causes wooden boards to warp or rot. These factors are especially important when working on outdoor projects, where the post trim will be continually exposed to the elements. Due to its high quality at such an affordable price, this trim is a must-have product for any DIY deck builder. 

These are easily installable, only needing construction adhesive to bring the look together; one quick home improvement that will transform your whole space. The post trim is designed with 3 sides attached and the 4th side hinged open. The base trim is available in both square and rectangular models and a variety of sizes, which makes it easy to add to existing posts. Within minutes, you now have a natural looking trim fit for your beautifully finished deck.

Azek Post Trim Installation Instructions:

The base post trim comes pre-assembled, with three sides joined together and a hinged open fourth side. To install, follow these two easy steps:

  • Apply an exterior-grade construction adhesive to the inside of the three-sided section and slide it firmly around the post

  • Apply an exterior-grade construction adhesive to the inside of the remaining piece and slide into place

Still have questions or need advice on ordering the right supplies for your project? Get in touch with Deck Expressions’ 24/7 customer service. We’re always ready to help.

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