Essential Insights on Choosing Composite Decking

Key points to consider when selecting composite decking

Over recent years, composite decking has gained widespread popularity, primarily due to its eco-friendly features. Made from recycled plastics or wood waste, this decking option is an environmentally conscious choice. If you're planning to install a composite deck, here are some important factors to keep in mind.

What are the main types of composite decking boards?

Two-sided : This budget-friendly option is offered by brands like Veranda® and sold at stores such as The Home Depot™. It features a wood-like grain on one side and a brushed finish on the other. Designed with a slotted profile for easy installation, it costs approximately $4.50 per square foot.

Resin-coated : These boards are encapsulated with specialized resin, offering a sleek finish and enhanced resistance to stains, fading, and scratches. The resin covers both sides for increased durability, following a slotted profile, and are priced around $5.80 per square foot.

100% Plastic Material : Made predominantly from virgin PVC (about 99%), these boards resemble composite variants greatly. They are more durable, scratch-resistant, and include a wood fiber mixture for stain resistance.

This type provides a tougher surface than polyethylene and resists scratching more effectively. Its wood fiber content also makes it safe against food stains.

Different quality levels of composite decking materials

Basic quality: These boards tend to have uneven shaping and deep grains. Typically 5 inches wide, they come in limited colors like red, brown, and gray. The underside features ridges, limiting usability to one side.

Mid-range: Offering a slightly better finish, these boards have two usable sides and come in four color options. They measure around 5½ inches in width, which is standard for composite decking.

Premium: Featuring streaks of multiple pigments to mimic tropical hardwoods, premium boards boast smooth, slip-resistant surfaces with minimal texture. They cost approximately $5.90 to $6.50 per square foot.

Profiles commonly used in composite decking

Slotted : Characterized by grooves on both sides, this profile accommodates hidden fasteners from various manufacturers. It is the most favored profile type, with prices starting at about $4.60 per square foot.

Solid : These thicker, non-grooved boards are adaptable for face or edge fastening, with two usable sides. Their starting price is around $4.60 per square foot.

Open flange : This profile reduces overall weight but may impact stability. Hidden fasteners deliver a sleek finish, with costs beginning at $5.90 per square foot.

Key considerations for installing composite decking

Joist spacing: Proper joist spacing is crucial for deck support. Spreading joists wider than 16 inches apart can cause sagging. Screws should be placed about ¾ inch from edges and ends to prevent damage.

Spacing between boards: Narrow gaps can trap debris, leading to stains, mildew, or water retention. Using 16d nails for spacing helps maintain proper separation.