What are the Different Types of Composite Decking?

The beauty of composite decking is that it’s versatile – you can choose different styles and shades to suit your project, budget and design. Eurocell’s composite decking has an engraved woodgrain pattern to give it a natural finish and there are different shades of brown, black and grey to choose from. 

Beyond looks, there is the technical spec to consider – capped or uncapped, and hollow or solid? This article breaks down what each of these means and which type of decking might suit your home. 

Details like colour or capped decking may seem like a small choice but it can make a real impact on the overall style, durability and costs. We get into the technicals below:  

Capped vs uncapped 

The difference between capped and uncapped decking is simple – capped has a protective layer over it to increase its lifespan. This protective layer, often polymer, protects the decking from sun damage, scratches, cracks, and more.  

For example, Eurocell’s range of Venture Composite Decking boards is capped on all three sides. The layer is manufactured from polyethylene, so it’s scratch, fade and moisture resistant. 

Uncapped boards, by contrast, don’t have a protective layer, so can become weathered and worn more quickly. But uncapped composite decking still offers more assurance than timber because the wood fibres are reinforced with polymer, so are more resistant to warping, cracking and rotting. 

Capped decking boards are generally more expensive because of the added protection but that does mean they have a longer lifespan. At Eurocell, capped decking boards start at £35.45, while uncapped boards are priced from £23.71.* 

If the decking is likely to have high footfall or it’s in a wet area like a swimming pool or hot tub, it’s best to go for capped composite decking. But if it’s for more general use and you want to keep costs down, opt for uncapped. 

Grooved vs ungrooved 

There is a smooth finish (ungrooved) or one with lines embossed into it (grooved) like the picture above. Ungrooved is more sleek, while grooved adds some character and it has more grip. 

Eurocell’s Ecoscape range comes with a dual-sided design. It has a natural straight grain but if you flip it over, there’s a modern groove pattern too. You get the option of both and can even create a bespoke design with a mixture of both. 

The Venture Composite Decking also has a groove on the edge – this helps it protect against moisture as any rainwater can easily drain or dry. 

Hollow vs solid 

Hollow composite decking boards, as the name suggests, have a hollow core. This makes them lightweight and easy to handle, and because less material is used in the manufacture, hollow boards tend to be cheaper. Eurocell’s hollow boards start from £23.71.*

By contrast, solid composite decking boards are more expensive – but that’s because they’re more durable and resistant to impact. Solid decking boards at Eurocell start from £34.32 up to £137.28 for more premium styles.* At the higher end, the boards won’t stain, fade, splinter or sag – and there is better surface traction to prevent slipping. These boards can also be used under water and there is hardly any expansion or contraction, so the base remains solid.

Composite decking comparison 

There are pros and cons to each type of composite decking but it all boils down to your needs. Solid and capped composite decking has a higher price point because it’s more durable, while hollow is lightweight and ideal for a simple decking project. Here’s a recap: 

Capped vs uncapped 

• Uncapped decking is more prone to surface damage, and cracking or rotting 
• Uncapped decking is the less expensive option
• Capped decking has a protective layer 
• Capped decking’s extra layer protects against moisture, scratches, chips and more 
• Grooved vs ungrooved 

Ungrooved boards are more sleek 

• Grooved boards add style and character 
• Grooved boards offer greater grip 
• You can also opt for grooved edges to improve moisture resistance     

Hollow vs solid 

• Solid boards are ideal for areas with high footfall or moisture like swimming pools
• Solid boards have greater strength and are more durable 
• Hollow boards are lightweight and more affordable 
• Hollow boards may be easier to install and handle 

The best options 

The most durable and low maintenance composite decking option is capped, solid decking – this is tough, so can withstand the elements and high foot traffic without compromising its structure. 

But there’s no right or wrong when it comes to composite decking. Make an informed decision based on your style preference and budget. Consider the following questions: 

• How will you use your decking? 
• Will it be exposed to moisture from heavy rainfall, swimming pools or hot tubs? 
• Do you prefer a sleeker finish or something that helps with grip? 
• Is durability more important than a higher upfront cost? 
• How long do you want the decking to last? 

Once you’ve settled on the type of decking, you can explore the different composite decking colours, whether to add steps or a balustrade, and finishing touches to bring the space to life. 

Choose the best decking for your project

From premium capped, solid decking boards to high-quality hollow boards, there is a lot to consider. Ultimately, you should choose boards that you love and will serve your home for years to come. 

At Eurocell, we have composite decking boards to suit every project and style, so check out our range and colour options.  

*All prices for Eurocell products are correct on the date of publishing. Please check the individual product pages for exact prices at the time of reading as these might be subject to change.