Decking Boards

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ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 150 x 5100mm

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£22.15 each (Inc VAT)

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£18.46 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£22.15 each (Inc VAT)

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£18.46 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 150 x 5400mm

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£23.46 each (Inc VAT)

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£19.55 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£23.46 each (Inc VAT)

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£19.55 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 2400mm

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£10.43 per piece (Inc VAT)

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£8.69 per piece (Ex VAT)

Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and outdoor spaces. Decking areas provide an attractive, stable, durable and comfortable area for relaxing or entertaining on. Arbordeck boards are high quality timber...

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£10.43 per piece (Inc VAT)

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£8.69 per piece (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 2700mm

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£11.72 each (Inc VAT)

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£9.77 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£11.72 each (Inc VAT)

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£9.77 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 3300mm

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£14.34 each (Inc VAT)

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£11.95 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£14.34 each (Inc VAT)

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£11.95 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 3900mm

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£16.94 each (Inc VAT)

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£14.12 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£16.94 each (Inc VAT)

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£14.12 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 4500mm

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£19.55 per piece (Inc VAT)

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£16.29 per piece (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

WAS: per piece

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£19.55 per piece (Inc VAT)

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£16.29 per piece (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 5100mm

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£22.15 each (Inc VAT)

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£18.46 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

WAS: each

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£22.15 each (Inc VAT)

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£18.46 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150 x 5700mm

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£24.76 each (Inc VAT)

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£20.63 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£24.76 each (Inc VAT)

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£20.63 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 125 x 3000mm

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£12.90 each (Inc VAT)

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£10.75 each (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life. Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£12.90 each (Inc VAT)

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£10.75 each (Ex VAT)
ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 125 x 5100mm

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£30.70 each (Inc VAT)

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£25.58 each (Ex VAT)

Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and outdoor spaces. Decking areas provide an attractive, stable, durable and comfortable area for relaxing or entertaining on. Arbordeck boards are high quality timber...

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£30.70 each (Inc VAT)

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£25.58 each (Ex VAT)
BuildDeck QuickFit Aluminium Decking 3600 x 21 x 152mm (RAL7039)

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£51.43 each (Inc VAT)

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£42.86 each (Ex VAT)

Builddeck is a leading manufacturer of Class A Fire-rated aluminium decking. These decking boards have a width of 152mm but remember when fitted they'll only have 125mm visible due to the nature of how they're fitted. This product is available in a range...

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£51.43 each (Inc VAT)

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£42.86 each (Ex VAT)
BuildDeck Regent Lite Fascia Trim Board Ebony 10 x 100 x 3600m

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)

The Regent Lite Fascia Trim Board is designed to deliver a professional and refined finish to composite decking projects. Suitable for both residential and commercial spaces, this fascia trim provides a practical solution for concealing exposed edges...

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)
BuildDeck Regent Lite Fascia Trim Board Grey 10 x 100 x 3600m

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)

The Regent Lite Fascia Trim Board is designed to deliver a professional and refined finish to composite decking projects. Suitable for both residential and commercial spaces, this fascia trim provides a practical solution for concealing exposed edges...

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)
BuildDeck Regent Lite Fascia Trim Board Redwood 10 x 100 x 3600m

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)

The Regent Lite Fascia Trim Board is designed to deliver a professional and refined finish to composite decking projects. Suitable for both residential and commercial spaces, this fascia trim provides a practical solution for concealing exposed edges...

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)
BuildDeck Regent Lite Fascia Trim Board Teak 10 x 100 x 3600m

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)

The Regent Lite Fascia Trim Board is designed to deliver a professional and refined finish to composite decking projects. Suitable for both residential and commercial spaces, this fascia trim provides a practical solution for concealing exposed edges...

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£25.16 each (Inc VAT)

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£20.97 each (Ex VAT)
BuildDeck Regent Lite Round Hole Decking Board Grey/Charcoal 23 x 138 x 3600mm

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£29.96 each (Inc VAT)

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£24.97 each (Ex VAT)

The Regent Lite Range combines smart value with lasting style, offering a fully capped, lightweight composite board that enhances any garden with a premium look and feel. Designed to balance sophistication, durability, and eco-friendliness, these boards...

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£29.96 each (Inc VAT)

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£24.97 each (Ex VAT)
BuildDeck Regent Lite Round Hole Decking Board Teak/Ipe 23 x 138 x 3600mm

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£29.96 each (Inc VAT)

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£24.97 each (Ex VAT)

The Regent Lite Range combines smart value with lasting style, offering a fully capped, lightweight composite board that enhances any garden with a premium look and feel. Designed to balance sophistication, durability, and eco-friendliness, these boards...

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£29.96 each (Inc VAT)

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£24.97 each (Ex VAT)
Forest Garden Patio Deck Tile 600 x 600 x 38mm (4 Pack)

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£81.58 each (Inc VAT)

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£67.98 each (Ex VAT)

This Patio Deck Tile is ideal if you want to make a feature outside your house. This tile's broad shape means that it creates a sizable surface area for lounging or entertaining. Additionally, it has inbuilt bearers, so you won't have to worry about how...

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£81.58 each (Inc VAT)

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£67.98 each (Ex VAT)
Forest Garden Patio Deck Tile 900 x 900 x 38mm (4 Pack)

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£149.84 each (Inc VAT)

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£124.87 each (Ex VAT)

If you want to create a feature outside your home, then this Patio Deck Tile is just the thing for you! The large format of this tile means that it creates a large surface area for entertaining or relaxing. It also comes with integral bearers, so there's...

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£149.84 each (Inc VAT)

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£124.87 each (Ex VAT)
Forest Garden Value Decking Board PEFC 2400 x 120 x 19mm (10 Pack)

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£117.01 each (Inc VAT)

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£97.51 each (Ex VAT)

A traditional, vertical board with a ridged profile made from pressure treated timber for a natural finish. The Value Deck Board from Forest is a traditional vertical board, at 2.4m in length it's ideal for creating a beautiful decked area in your garden...

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£117.01 each (Inc VAT)

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£97.51 each (Ex VAT)
Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 125 x 3000mm

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£13.68 per piece (Inc VAT)

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£11.40 per piece (Ex VAT)

The Arbordeck Treated Timber Deck is manufactured from high quality imported Scandinavian softwood, with a high-pressure green treatment providing longer life.Arbordeck decking boards are a perfect choice for traditional or contemporary gardens and...

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£13.68 per piece (Inc VAT)

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£11.40 per piece (Ex VAT)
Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 125 x 3600mm

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£16.42 per piece (Inc VAT)

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£13.68 per piece (Ex VAT)

Timber decking boards are a perfect choice for any traditional or contemporary outdoor garden space. Decking areas provide an attractive, stable, durable and comfortable area for relaxing or entertaining on. These decking boards are high quality timber...

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£16.42 per piece (Inc VAT)

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£13.68 per piece (Ex VAT)
Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125 x 3000mm

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£15.20 each (Inc VAT)

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£12.67 each (Ex VAT)

Timber Decking UC3u Treated Reversible Smooth or Grooved is high quality decking with the option of having it smooth side up or grooved side up for extra grip. Treated Decking provides an excellent alternative to a paved patio area, offering an...

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£15.20 each (Inc VAT)

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£12.67 each (Ex VAT)

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Treated Timber Decking

What to Consider When Buying Decking Boards

When choosing your wood decking boards, keep these points in mind:

Board size – Match the length of your boards to your deck layout. This helps reduce waste and joints.
Timber type – Think about style, durability, and whether the wood is treated for outdoor use.
Surface finish – Grooved boards improve grip and water drainage. Smooth boards give a sleek, modern look.
Maintenance – Timber decking may need staining or oiling to stay looking its best.

Not sure how many boards you need? Use our Decking Board Calculator and our friendly teams will be happy to help.

to plan your project and order with confidence.

Whether you're a trade professional or a DIYer, our team can help you choose the perfect solution. Many of our branches offer a timber cutting service, so you get the exact sizes you need.

Using a CAMO Marksman Edge allows you to insert hidden deck fasteners into the edge of the board, creating a neat finish without gaps. This tool works with any size of decking.

For exceptionally wide boards, the CAMO Wide Board Marksman Pro is a better choice because it includes a spacer for guidance.

Where to Use Timber Decking Boards

Decking boards are perfect for covering damaged concrete. They make outdoor areas look clean and inviting.

If your garden is boggy or damp, decking helps lift the space above wet ground, making it usable all year. It also works for sloped or uneven gardens, creating a level area for tables and chairs.

Grooved boards are ideal near pools or water features because the grooves help water run off quickly. For longer decking lengths, choose smooth boards instead for better performance.

At Howarth Timber & Building Supplies, we stock a wide range of decking boards, plus C16 and C24 timbers for your framework. We also offer composite decking and everything you need in our Garden & Landscaping range to complete your outdoor project.

Frequently Asked Questions

How much are decking boards?

A garden deck project will typically cost between £1,000 and £2,000. The cost will vary depending on the type of materials you select, the size of the decking and the location. The four most popular decking boards include softwood, hardwood, composite and antislip timber.

How wide are decking boards?

The most common decking widths are 90mm to 150mm, with 120mm and 140mm in between. The width option you choose for your project can make a big impact in the ultimate effect, so get creative to achieve the best look for your decking while staying within your budget.

How long does deck last?

You can anticipate your timber decking to last at least 15 years and up to 30 years if you use suitable materials and follow installation and maintenance guidance. When it comes to decking maintenance, the most important things to remember are to use properly treated deck boards, use appropriate deck fasteners, and keep your deck clean. Install your timer deck appropriately and it will last a long time.

What gap should you leave between decking boards?

Leave 5mm gaps between deck planks while installing them. A gap at the end of the boards must be considered, the recommended gap is around 4.5mm to 6mm. This gap will allow the deck to breathe, provide drainage, and make cleaning easier. You must leave gaps between your deck boards so they can compress and expand. They can cause friction if they are too close to each other, which can harm the boards. It can also cause the boards to bend, cup, or warp. Leaving spaces between the gaps can help with drainage, reducing the likelihood of water gathering on your patio. You may also limit the risk of moisture damage, mould, and mildew growth by having good drainage.

What is the difference between Hardwood and Softwood?

Hardwoods are so-called, as they are sourced from trees that grow slowly, meaning the wood has more time to mature. In comparison, Softwoods are sourced from fast-growing trees, but this doesn’t mean softwoods can’t be tough too. Hardwood decking is often a popular choice because hardwoods are typically more resilient against rot and degeneration. However, softwood decking boards are also a great choice with a little extra maintenance.

Difference Between Smooth and Grooved Deck Boards

A lot of companies will tell you that Grooved Deck Boards are the better option because they offer more slip resistance. However, this is untrue: Grooved Boards offer no advantage – in terms of slippage – over Smooth ones.

How many decking boards do I need?

To begin, calculate the area of your decking in square metres. This is quite straightforward if your decking is square or rectangular. Simply double the length and width of your planned decking space by two. Then put the area of all of these together to get your total. After that, measure the width of the decking boards you intend to use. It's a good idea to add roughly 5mm to the board width to account for the minor gaps between each decking board. Then, take this measurement and divide it by the length of the decking planks you intend to buy. You now know how many decking boards you’ll need.

What direction do you lay decking boards?

You need to lay decking boards in a diagonal direction, as this gives them a very noticeable look.