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The Global Insight

Whats the difference between hollow and solid composite decking

Author

Emma Valentine

Updated on April 01, 2026

There are two types of composite decking available — solid and hollow. Solid Composite Board: Heavier but looks more like wood. Hollow Composite Board: Lighter, and expands and contracts less than solid boards.

Is composite or hollow solid decking better?

Hollow composite decking are often cheaper and, because they’re lighter, they can be easier to install. However, they typically have a more uniform look than solid boards and therefore appear less realistic. … Solid composite decking does not only look more realistic, but also offers additional strength.

Is composite decking hollow?

The composite core is covered with a protective wood-look shell that resists warping, staining, fading, and mould. Conversely, if you’re limited in your budget, hollow composite decking boards give your deck a more manufactured, less organic look – most apparent in the holes on the deck board ends.

How long does hollow composite decking last?

Given good care and proper installation, you should expect a composite wood deck to last somewhere in the region of 25-30 years – possibly longer.

Is Trex decking solid or hollow?

For instance, Trex® high performance solid composite decking boards are a timber-plastic composite manufactured primarily from a blend of reclaimed organic timber and recycled plastic materials. Their core is made from recycled composite materials – such as recycled sawdust and plastic blended with new synthetics.

Is hollow composite decking any good?

Hollow composite decking may seem like a great choice at first. It’s usually a lot cheaper than solid decking and it can look perfectly good on the surface. But the difference in quality lies beneath the surface. … Solid decking, on the other hand, has a higher density and weight that makes it durable and long lasting!

What are the disadvantages of composite decking?

  • A pricey alternative to wood. Durability comes at a cost, as composite decking is more expensive than wood. …
  • Composites aren’t natural. …
  • Composite decks aren’t completely maintenance free. …
  • You’ll need to comparison shop.

Is a Trex deck worth it?

Composite decking is worth the money. It costs more upfront, but thanks to minimal maintenance costs and long life, the annual cost for the life of the fence is significantly cheaper for composite materials. If what you have in mind are the Trex decks of 15 years ago, you’d be surprised to see how far they’ve come.

What maintenance does composite decking require?

Like the rest of your exterior home and yard, your Trex deck is exposed to the elements. Dirt, debris, and mold can build up over time, requiring annual or semiannual cleaning with either a composite deck cleaner or soapy water made with dish soap.

Is Trex decking better than wood?

The composite material is touted as superior to traditional wooden decking because it is resistant to weather, needs less maintenance and is stain-proof. … With a Trex deck, you can wipe up the blemish with a wet paper towel and the surface is as good as new. Natural decking tends to splinter over time; composites don’t.

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What is the difference between grooved and solid composite decking?

The main difference between grooved and ungrooved composite decking lies in the construction of their sides. A grooved board features a notch or channel down the edges, while a solid board is groove-free. This does not substantially impact your deck’s overall look, but it does change how you install the decking.

Why does composite decking have holes?

Lower Cost. Price is perhaps the most attractive reason for using hollow boards over solid. Because the board is hollow, less material is used in the manufacturing process. This enables providers like us to pass the savings along to the consumer.

What is hollow board?

Hollow boards are typically engineered to more efficiently use less material to create a strong or stronger board than a solid board. There is a visual component that concerns some regarding the look of the deck board ends. … Whereas, in Europe and Asia, engineered hollow boards have broad acceptance.

What is solid decking?

Solid Boards Resemble Real Wood Composite decking contains real wood (as well as plastic), but if you want your deck to look like it’s made of solid wood, you might prefer solid composite boards. On the other hand, while hollow boards can look more manufactured, they can look more uniform.

Who makes solid composite decking?

MoistureShield is a composite decking manufacturer offering the only wood plastic composite decking boards with Solid Core, which means our decking boards can be installed on the ground, in the ground and underwater.

Is composite decking slippery when wet?

Composite decks are not slippery even when there is water on the surface. The problem, however, is when there is an accumulation of both ice and water on your composite decking. Aside from being the cause of accidents, ice, and the removal of it, can cause some damage to your patio.

Can composite decking be placed over wood?

In short, yes you can. You are more than capable of placing composite deck boards over existing wooden ones in order to save time and money from building an entirely new frame.

Does composite decking get hot to walk on?

Both Wood and Composite Decking Are Hot in the Sun to Walk On. All decking will be hot to the touch. Steps can be taken to reduce the decking temperature, but it will still be hot to the touch. Meaning that regardless if your decking is wood or composite, it will be hot in the sun.

Why does composite decking have grooves?

Grooved-Edge Decking Appearance: The primary reason people choose grooved decking is because they don’t want to see deck screws messing up their deck’s surface. Grooved decking has slots cut into both sides so it can be installed with hidden fasteners.

Why is my composite deck turning white?

Probably the first thing a homeowner will notice is white spots on the deck. These are exposed wood particles bleached by the sun and rain. This is a sure sign that the deck’s seal has been damaged.

Can you power wash composite decking?

PRESSURE WASHING YOUR COMPOSITE DECKING Pressure washing is not usually recommended for composite decking. … Pressure washing too close or using too much pressure can be ruinous for your deck. Composite decking material is softer than natural wood and therefore can be “etched” more easily.

Does composite decking need a run off?

To achieve rain water “run off”, decking should be laid on a slight gradient of at least 1 in 80 (1.25%) in the direction of the long side of the boards in the grooves direction. Good drainage and ventilation around and under the deck is required.

Can I put Grill on Trex deck?

Yes, Gas grills are safe to use on a composite deck. Composite decking is designed to a minimum of Class C fire rating similar to wood decking. … As an extra layer of protection, people will often place a grill mat or pad to protect the decking from both heat and spills.

Why is Trex decking so expensive?

The first reason why composite decking is expensive is that they’re not an expenditure. … Composite decking materials are designed to be resistant to mold, mildew, and rot. There’s no chance of any bug damage. It may be a hefty price upfront, but it does end up saving you a ton of money in the long run.

Can dogs nails scratch Trex decking?

Composite decking mimics the look of natural wood, but without the upkeep. While it’s much more scratch resistant than wood, it’s not totally scratch proof. With enough gusto, your pooch could still leave permanent marks.

Which brand of composite decking is best?

  1. Fiberon. Fiberon is a brand that specializes in composite decking materials. …
  2. MoistureShield. MoistureShield has a great product that is definitely worthy of your attention. …
  3. Cali Bamboo. …
  4. Trex. …
  5. Duralife. …
  6. Lumberock. …
  7. Envision. …
  8. TimberTech (AZEK)

Are Trex decks hot?

While wood gets hot enough to make walking with bare feet uncomfortable, composite decking gets even hotter. In some cases, Trex can become so hot that it may become unusable under intense, direct sunlight. The darker the Trex decking material, the more heat is retained.

What is the coolest composite decking?

TimberTech capped polymer decking is engineered to be cooler to the touch, even in direct sunlight. TimberTech AZEK decking, our capped polymer decking line, features advanced materials science in its core and cap that makes it more heat resistant than other composite decking products.

Can you screw hollow composite decking?

You can not drill or screw through a hollow composite deck as the screw will become loose and rise in time . Like the usual wooden decking boards, you can also screw down a solid composite decking.

What is the difference between grooved and square Trex decking?

Grooved deck boards have channels that run the length of the board on both sides. … Non-grooved deck boards (also called square-edge boards) are solid on all sides. They are installed using either Fiberon Cortex hidden face fasteners or 2.5-inch #8 composite deck screws.

What gap do you leave between composite decking?

Allow a 5mm gap between the end of the composite deck board and vertical edge of the strip. Use a drill to first make a pilot hole through the strip and deck.