Can You Use Composite Boards for a Horizontal Slat Fence?

Yes, composite boards can be used for horizontal slat fences, though they require specific installation techniques compared to traditional wood.

While composite materials offer the benefit of zero rotting and do not require staining, they have different physical properties that must be addressed during construction:

• Thermal Expansion: Composite boards expand and contract more than wood. To prevent buckling in heat, installers must use wider gaps (typically around 1/4 inch) and flexible fasteners that allow for natural movement.
• Structural Support: Because composite is a heavier material, it requires stronger posts and rails to support the weight of the horizontal spans.
• Installation Hardware: It is recommended to use hidden fasteners to maintain clean lines while accommodating the material’s expansion and contraction.
• Cost and Maintenance: While a composite horizontal fence typically costs 20-30% more upfront than premium cedar, it eliminates long-term maintenance costs such as staining and sealing.

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