Essential Insights into Composite Decking Materials

July. 16,2025

Discover the essentials of composite decking, including types of boards, material grades, profiles, and installation tips. Learn how eco-friendly materials and different profiles can help you craft durable, stylish outdoor spaces. This guide provides practical insights for choosing the right composite decking options to suit your needs, ensuring a long-lasting and appealing deck. Perfect for homeowners and building professionals interested in sustainable, low-maintenance decking solutions.

Essential Insights into Composite Decking Materials

Essential Insights into Composite Decking Materials

Key Facts About Composite Decking Materials

In recent years, composite decking has gained significant popularity among homeowners. Its eco-friendly credentials, made from recycled plastics and wood waste, make it an attractive choice. If you're considering installing a composite deck, here are some essential points to consider.

What Types of Boards Are Used in Composite Decking?

  • Double-sided : An affordable option produced by brands like Veranda®, available at The Home Depot™, featuring a wood-grain textured side and a brushed finish. Priced at approximately $4.50 per square foot, it installs with a slotted profile.
Essential Insights into Composite Decking Materials
  • Resin-coated : These boards are wrapped in a proprietary resin coat, offering a sleek finish and protection against stains, fading, and scratches. The resin covers both sides for enhanced durability and installs with a slotted profile, costing around $5.80 per square foot.
  • All-plastic : Made predominantly from 99% virgin PVC, these boards resemble composite materials closely and are more resistant to scratches. Their strength is greater, and they are safe from food stains due to a wood fiber mix incorporated in their composition.
This durable material surpasses polyethylene in hardness, offering improved resistance to damage and staining.

Material Grades for Composite Decking Boards

  • Basic : Featuring uneven shapes and deep grains, these boards are 5 inches wide, offering limited color options such as red, brown, and gray. Their ridges on the underside mean only one side is usable.
  • Mid-range : These boards sport a better finish with two usable sides and come in four color choices. They are typically 5.5 inches wide, making them suitable for most decking projects.
  • Premium : Designed to mimic tropical hardwoods with streaked pigments, these boards have smooth surfaces that are slip-resistant. They are priced between $5.90 and $6.50 per square foot.

Popular Profiles for Composite Decking

  • Slotted : Featuring grooves on both sides for hidden fasteners, this is a favored profile that starts at about $4.60 per square foot.
  • Solid : Thick and without slots, these boards offer installation flexibility with face or edge fastening options, starting at $4.60 per square foot.
  • Open flange : Lighter and designed for reduced weight, but with less stability, these boards use hidden fasteners and start from around $5.90 per square foot.

Important Considerations for Installing Composite Decking

  • Joist spacing: Proper spacing (preferably no more than 16 inches apart) is vital to prevent sagging. Screws should be placed at least ¾ inch from edges and ends.
  • Board spacing: Narrow gaps can trap debris and promote mildew. Using 16d nails helps maintain optimal spacing and drainage.
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