Can Composite Decking Like Trex Be Painted?

can you paint trex

Composite decking such as Trex has been popular ever since it was introduced.

This is because composite decking has the advantages of less maintenance and resistance to rot.

However, the downside is that unprotected composite decking is vulnerable to color fading from ultraviolet or UV rays.

This led to whether composite decking such as Trex could be stained or painted.

The answer is that the Trex surface can be painted if you use the right combination of primer and paint. An acrylic latex primer followed by a latex semi-gloss or satin finish paint will work best.

For staining, it is best to use an acrylic latex version that includes inhibitors for UV rays and mildew.

But before applying anything on your old Trex boards, make sure you clean and prep them properly for getting the paint.

How to Clean Trex Boards?

The first step is to sweep the deck clean so that no loose particles such as dust, dirt, or leaves remain.

Once swept, you can then use a composite deck cleaner which will remove any grime or stains on the surface.

When the product has been applied and the deck scrubbed, rinse away the residue with warm, soapy water.

You can either spray the deck with a hose or use a soft-bristle brush if required.

Using a pressure wash for your Trex decking is also fine but with low pressure, as a high-pressure range can damage the Trex material and can void the composite material warranty.

Once you have cleaned, let the deck dry for a few days and then sweep it again to clear away any leaves, dust, or dirt that may have collected during that time.

Finally, apply a deck “brightener” to the surface which contains oxalic acid and can help remove tannins caused due to debris.

Removing Old Paint from Trex

If there’s an old paint layer on your Trex already, remember it cannot be sanded.

Unlike other surfaces, you also cannot use chemicals or solvents on Trex as they can damage the surface.

The best-recommended way to strip latex paint off of your Trex boards is by applying warm, soapy water and then scrubbing the paint gently with the soft-bristled brush.

Make sure you do not scrub hard or you may mar the surface while removing the loose paint particles.

I have once used Krud Kutter Cleaner & Degreaser for removing the drips and overspray while painting Trex.

Not very sure if it works for removing the old dried paint – but you can try.

how do you paint trex

How to Paint a Trex Composite Decking?

Now you are ready to paint.

It is best to paint the deck before it has a chance to fade. But even if it is in the beginning stages, the paint will stop the process.

What follows are the steps you need to follow.

Step 1- Cover

Provide cover to any plants and grass that cannot be removed from the area.

Use a plastic or canvas cloth so that no chemicals are spilled on them.

Step 2- Clean & Sand

It is best to clean the area one more time before you start the next step.

Inspect the deck and do any spot cleaning first then sand.

Sanding will not only smooth out the planks it will help the paint to stick to the surface.

You can use 240-grit sandpaper and cover the entire surface of the deck.

Once completed, you should sweep the dust generated away and then rinse with water again.

Step 3- Primer & Paint

Once the deck is fully dry, you can apply the primer.

An acrylic latex exterior primer is the best. Be sure to apply it in the direction of the planks for the best result.

When the primer dries, you can now paint the deck.

Use an outdoor porch paint and apply it with a roller for the best results.

Apply the first coat, let it dry, and then apply a second layer for maximum protection.

The manufacturer’s instructions will indicate how long it will take the paint to fully dry.

What is Trex or Composite Deck?

As the name suggests, composite materials consist of both wood and plastic.

In many cases, the materials are recycled for other uses.

Trex in general is the brand which is known to be the world’s largest manufacturer of high-performance wood-alternative decking, porches, railing, lighting, trim, framing, and furniture.

Formed in 1996, they are currently in business with the largest market share of composite decking in North America.

Trex uses sawdust and plastic from different sources for greater resiliency. However, it is true that not all composite decks are the same.

PVC Composite:

This is when the product mostly or entirely is made from PVC often using the compression molding technique.

Such materials are generally the strongest and most durable with a price tag to match.

However, the advantages are considerable, especially since it resists rot, mold, and mildew along with turning away otherwise damaging insects such as termites.


This is a manufacturing process that combines raw materials and then melts them together.

Popular brands of extruded wood are DuraLife and Lumberrock.

However, Lumberrock only contains plastic and minerals as no wood is present.

Compression Molding:

This is when the ingredients are placed into a mold and heated.

The result is planks made of composite materials which can be used to create decks much like with Trex.

Can Composite Decking Be Painted

Can All Composite Decking Be Painted?

Just about all composite decks can be painted unless they say otherwise.

Some of the exceptions include the following.


This brand claims that the paint or stain will not stick to the surface which leads to peeling or flaking


Because this brand is 100% PVC, the paint will not adhere to the surface very well even with sanding.

Plus, painting the deck will violate their warranty, so it is advisable not to apply any paint.

There are some decks under the Trex brand that are not advisable to paint.

They are Escapes and Transcend which are two types of decking where the paint does not adhere well at all.

These are more expensive types of composite decking material where the painting is not required or advised.

How Long Does Trex Composite Decking Last?

As for how long composite decks are built to last, the average range is from 25 to 30 years with little to no maintenance required at all.

The only thing that you can do is clean the deck, but the toughness of the material means that even when it is not cleaned, the dirt and grime do not affect the longevity of the deck itself.

This is because the decking is made from a combination of materials, normally wood and plastic or minerals and plastic with no wood at all.

It may look like wood, but in many cases, the amount present is not that much. Because plastic and minerals are highly resistant to weathering, they can last for a long time.

Having said that, they are vulnerable to impacts as with any wooden deck. Although because of the dense material used it is more difficult to damage.

Plus, composite decks are environmentally friendly because they use materials that otherwise would go into landfills.

Plastic is particularly good because it has strength, durability, and resists mold, mildew, and insects to a far greater degree compared to wood.

And because it looks so much like wood, especially the higher-end products, it can be difficult to tell it from real wood.

What Can Void the Trex Warranty – Mistakes You Should Avoid

According to the manufacturer, Trex products are backed up by 25-Year Limited Residential Fade & Stain Warranty so that you can rest assured about the investment you make.

But remember, the warranty can get void due to your negligence or if you do not care for your product well.  

Below are a few tips that you follow when cleaning and maintaining the Trex composite material…

a). Mold and mildews:

Molds and mildews can be an issue if dirt, debris, or pollen is allowed to remain on the surface for long.

So, it’s recommended to remove all these food sources for mold on a regular basis by spraying the surface with a hose and warm soapy water.  

b). Oily, greasy foods:

Stains caused due to food spills are always an issue for those who love enjoying weekend barbeque parties with their friends and family outside on their deck.

Trex manufacturers recommend that the surface and stains should be cleaned within seven days if you do not want to void the Trex stain warranties.

You can most likely remove the stains within seven days by using a soft bristle brush and warm soapy water.

c). Ice and snow removal:

If you live in a region with snowfall, always use a plastic shovel to remove any snow or ice from your Trex deck.

If possible, you should first use some calcium chloride or rock salt to melt the snow before removing it from the surface.

In addition to snow and ice, hard water with high amounts of mineral deposits (like lime, silica, and calcium) can also deposit and stain the Trex surfaces if left unnoticed.

To remove these hard water stains and deposits, you can use a homemade cleaner such as white vinegar followed by rinsing with clean water.

You should never use harsh chemicals such as acetone or other solvents on Trex as it can negatively affect the beauty of the surface.

Few other tips you can follow to increase the longevity of your Trex material include:

  • Do not use rubber-backed welcome mats as they can cause discoloration
  • Use General Purpose Staticide and Heavy Duty Staticide for fixing issues like static electricity that can occur in dry climates while walking
  • Use products such as Mr. Clean, Magic Eraser, and Dupli-Color Clear Scratch Seal Pen for fixing color transfer issues, light scratches, and scuff marks

All these products are non-toxic, non-staining, biodegradable, as well as safe to use on Trex.

The Bottom Line

Trex can be extremely useful where installing timber boards is found to be an issue for decks and trims due to varied reasons.

Just make sure you follow the right steps for its maintenance as the material is sensitive and can get damaged if not cared for well.

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