Can You Paint Trex Decking?

Whether your Trex deck is old or you simply want to change its look, you may wonder if it's safe to paint. Trex is low-maintenance by design, and paint, stain, or sealant can remove that benefit and create a lot of extra work. Plus, only older Trex products can safely hold a coat of paint, so tread carefully and read on about whether you can paint your Trex decking before you try.

What Is Trex Decking?

Trex is just one of several brands that manufacture composite decking, a mixture of recycled wood fibers, plastic, and a binding agent. The result of this mixture is a hybrid product that's denser, stronger, and heavier than wood alone.

Trex Decking Benefits

Composite decking like Trex has several advantages over traditional wood:

• It's lower maintenance and doesn't need to be sealed or painted

• It comes with an extended warranty

• It's made of recycled plastic that would otherwise end up in landfills

Is it Possible to Paint Trex Decking?

You can paint Trex decking, but there's a catch. Only some Trex decks withstand painting, and it depends on the age of your Trex product.

Which Trex Decking Products Can You Paint?

Only certain early-generation Trex products can be painted or stained. The table below breaks down which products can and can’t be painted:

*The top surface cannot be painted or stained, but the ends and underside can be stained. Additionally, the railing can be painted, but only if the original railing color is white.

Trex stopped manufacturing its early-generation products in 2014 when it came out with a new, high-performance material. These early-generation Trex products are subject to fading after 12 weeks. After this occurs, the decking can be painted or stained.

Should You Paint Trex Decking?

Photo: Inga / Adobe Stock

The surface of newer Trex decking products should not be painted. Paint can trap moisture inside the composite material, causing it to split or crack. These products can be stained underneath, but it isn’t necessary.

Early-generation Trex decking can take paint or stain. However, once you apply paint to a composite material, the decking will require additional maintenance, similar to wood. Needing a new coat of paint every few years defeats the purpose of maintenance-free composite decking.

You may want to paint older Trex decking if it's no longer under warranty. Paint or stain may help extend your deck's life span by a few more years, but it's only a temporary solution. Eventually, the deck will require replacement.

What Kind of Paint Can You Use on Trex Decking?

The best type of paint to use on composite decking is exterior latex acrylic paint. Exterior paint is required to handle the outdoor elements. You can use an oil-based or water-based paint, but water-based paints are prone to flaking and peeling unless properly sealed. Before painting, you must apply a fast-drying acrylic latex primer as a base coat.

Avoid darker paint colors such as black, brown, or forest green. These tend to draw excessive heat from the sun, which can damage the decking material beneath.

Tips for Painting Your Trex Deck

If you know the age of your Trex decking and you're sure it's safe to paint, follow these tips before starting your project:

• Rough up your decking boards with 240-grit sandpaper to increase paint adhesion.

• Thoroughly clean your deck and let it dry before painting.

• The best time to stain a deck is on a warm, dry day for speedier drying.

• Avoid painting under direct sunlight to avoid an unwanted sheen.

• Use a thin coat of paint to preserve the wood grain design.

• If using water-based paint, seal or varnish the surface after it completely dries.