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How to Install Cellular PVC Trim
Jun 28, 2018


Due to material similarities, the installation of cellular PVC trim is similar to that of exterior wood trim. Also, just like other building materials, cellular PVC trim will expand and contract.

  • 1/8” of expansion and contraction space should be allowed for every 18’-0” of installed material.

  • Miter and scarf joints should be adhered with a proper adhesive to eliminate joint separation.

  • Boards are to be secured with two standard wood trim fasteners on both sides of a joint, and then two fasteners every 16” along the length of the trim board.

  • A nail gun or hammer can be used to drive fasteners into the material and secure it to a solid substrate. Staples, small brads, and wire nails cannot be used for the installation of cellular PVC material.

  • If you decide you want to paint cellular PVC, you can expect a properly prepared and coated surface to last twice as long as painted wood. A 100% acrylic paint can be used for colors with a Light Reflective Value (LRV) of 55 or higher. Darker colors with a LRV of 54 or lower require special application paints.