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Decking Boards

Decking Boards are a simple way of transforming your outdoor space into something amazing and are available in a variety of sizes in softwood and hardwood, plus thermally treated options are available.

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  • Special Offer
    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm
    Special Offer

    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm

    £5.40 - £12.15 per piece (Ex VAT)
    £6.48 - £14.58 per piece (Inc 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. Redwood is a premium wood used in...
    £5.40 - £12.15 per piece (Ex VAT)
    £6.48 - £14.58 per piece (Inc VAT)
  • Special Offer
    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150mm ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 150mm
    Special Offer

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

    £6.60 - £15.68 per piece (Ex VAT)
    £7.92 - £18.82 per piece (Inc 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...
    £6.60 - £15.68 per piece (Ex VAT)
    £7.92 - £18.82 per piece (Inc VAT)
  • Special Offer
    Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm
    Special Offer

    Timber Decking UC3u Treated Reversible Smooth or Grooved 32 x 125mm

    £6.75 - £12.15 each (Ex VAT)
    £8.10 - £14.58 each (Inc 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...
    £6.75 - £12.15 each (Ex VAT)
    £8.10 - £14.58 each (Inc VAT)
  • Special Offer
    ArborDeck Timber Decking UC3u Treated Pattern B 38 x 125mm ArborDeck Timber Decking UC3u Treated Pattern B 38 x 125mm
    Special Offer

    ArborDeck Timber Decking UC3u Treated Pattern B 38 x 125mm

    £7.08 - £16.80 per piece (Ex VAT)
    £8.50 - £20.16 per piece (Inc VAT)
    The Arbordeck Treated Timber Deck is manufactured from high quality imported softwood, with a high-pressure green treatment providing longer life. All sizes are nominal. Take 5mm off edges for true size. Please note: Timber decking boards may contain...
    £7.08 - £16.80 per piece (Ex VAT)
    £8.50 - £20.16 per piece (Inc VAT)
  • Special Offer
    ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 150mm ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 32 x 150mm
    Special Offer

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

    £6.60 - £14.85 per piece (Ex VAT)
    £7.92 - £17.82 per piece (Inc 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...
    £6.60 - £14.85 per piece (Ex VAT)
    £7.92 - £17.82 per piece (Inc VAT)
  • Special Offer
    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 125mm ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 125mm
    Special Offer

    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 125mm

    £8.85 - £27.08 per piece (Ex VAT)
    £10.62 - £32.50 per piece (Inc 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...
    £8.85 - £27.08 per piece (Ex VAT)
    £10.62 - £32.50 per piece (Inc VAT)
  • ArborDeck Timber Decking & Rail UC3u Treated Contemporary 6 Smooth 38 x 150mm ArborDeck Timber Decking & Rail UC3u Treated Contemporary 6 Smooth 38 x 150mm

    ArborDeck Timber Decking & Rail UC3u Treated Contemporary 6 Smooth 38 x 150mm

    £20.26 - £24.70 per piece (Ex VAT)
    £24.31 - £29.64 per piece (Inc VAT)
    This product can be used as both a rail or a deck board. Manufactured from high quality imported softwood, high pressure green treatment providing longer life. All sizes are nominal. Take 5mm off edges for true size. Please note: Timber decking boards...
    £20.26 - £24.70 per piece (Ex VAT)
    £24.31 - £29.64 per piece (Inc VAT)
  • ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 25 x 100mm ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 25 x 100mm

    ArborDeck Timber Decking UC3u Treated Reversible Grooved or Reeded 25 x 100mm

    £9.39 - £12.52 per piece (Ex VAT)
    £11.27 - £15.02 per piece (Inc VAT)
    The Arbordeck Reversible Treated Timber Decking is a versatile grooved option that is manufactured from high-quality imported softwood. It is the perfect addition to any outdoor space, as an alternative to grass or paving. Please Note: All given sizes...
    £9.39 - £12.52 per piece (Ex VAT)
    £11.27 - £15.02 per piece (Inc VAT)
  • ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 150mm ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 150mm

    ArborDeck Timber Decking UC3u Treated Reversible Smooth or Grooved 38 x 150mm

    £14.65 - £26.38 each (Ex VAT)
    £17.58 - £31.66 each (Inc VAT)
    Smooth and Grooved Decking UC3u Treated 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. Treated to...
    £14.65 - £26.38 each (Ex VAT)
    £17.58 - £31.66 each (Inc VAT)
  • Timber UC3u Treated Reversible Smooth or Grooved 32 x 125mm Timber UC3u Treated Reversible Smooth or Grooved 32 x 125mm

    Timber UC3u Treated Reversible Smooth or Grooved 32 x 125mm

    Treated Decking provides an excellent alternative to a paved patio area, offering an attractive addition to your garden space that is ideal for al fresco dining and BBQs. Wood naturally rots over time, but by treating the timber, we are able to slow down...
  • Forest Garden Patio Deck Board 2400 x 120 x 28mm (5 Pack) Forest Garden Patio Deck Board 2400 x 120 x 28mm (5 Pack)

    Forest Garden Patio Deck Board 2400 x 120 x 28mm (5 Pack)

    The Patio Deck Board from Forest is a solid, traditional, vertical board with a ridged profile. The high-quality board is manufactured from pressure-treated, FSC-certified timber with a 15-year Anti-Rot guarantee. At 2.4m, this Patio Deck Board is...
  • ArborDeck Timber Decking & Rail UC3u Treated Contemporary 4 Smooth 38 x 100 x 3600mm ArborDeck Timber Decking & Rail UC3u Treated Contemporary 4 Smooth 38 x 100 x 3600mm

    ArborDeck Timber Decking & Rail UC3u Treated Contemporary 4 Smooth 38 x 100 x 3600mm

    Top selling high-quality imported softwood timber is created from slow-grown premium redwood. Timber allows you to create beautiful decking that may be used to expand your home into your garden or provide a relaxing escape. For a longer life and to...
  • Forest Garden Ridged Deck Tile 500 x 500 x 32mm (4 Pack) Forest Garden Ridged Deck Tile 500 x 500 x 32mm (4 Pack)

    Forest Garden Ridged Deck Tile 500 x 500 x 32mm (4 Pack)

    Ideal decking tile for creating a beautiful decked area in your garden quickly and easily. The Forest Ridged Deck Tile is a square lightweight tile, at 50 x 50cm it is ideal for creating a beautiful decked area in your garden on which to entertain or...
  • Hardwood Timber Decking Reversible Grooved or Reeded 21 x 145mm Hardwood Timber Decking Reversible Grooved or Reeded 21 x 145mm

    Hardwood Timber Decking Reversible Grooved or Reeded 21 x 145mm

    Hardwood decking provides a naturally durable deck, with a warm colour that is rich and vibrant. It can be easily maintained with the application of deck oil, or allowed to weather naturally over time to an attractive shade. All sizes are nominal. Take...
  • Special Offer
    Cheshire Mouldings Pine Decking UC3 Treated 5 Tread String 1455 x 250 x 48mm (DS5) Cheshire Mouldings Pine Decking UC3 Treated 5 Tread String 1455 x 250 x 48mm (DS5)
    Special Offer

    Cheshire Mouldings Pine Decking UC3 Treated 5 Tread String 1455 x 250 x 48mm (DS5)

    The 5 Tread Decking String is made using treated Pine and allows you to create steps to various levels of decking with great ease. 3 Tread Decking Strings also available. Pine is a durable timber, which is easy to work with and looks great outside...
  • Forest Garden Decking UC3u Treated Patio Deck Tile Forest Garden Decking UC3u Treated Patio Deck Tile

    Forest Garden Decking UC3u Treated Patio Deck Tile

    £63.54 - £116.85 each (Ex VAT)
    £76.25 - £140.22 each (Inc VAT)
    This patio tile has been pressure treated guaranteeing 15-years against rotting, which has been manufactured using responsibly sources timber. The Forest patio deck tile comes with integral bearers, which creates an attractive centrepiece in your garden...
    £63.54 - £116.85 each (Ex VAT)
    £76.25 - £140.22 each (Inc VAT)
  • Lunardeck Timber UC3u Treated Thermal Redwood 32 x 125mm Lunardeck Timber UC3u Treated Thermal Redwood 32 x 125mm

    Lunardeck Timber UC3u Treated Thermal Redwood 32 x 125mm

    Lunardeck Thermal Redwood Treated Decking is made up of grooved deck boards that are designed to prevent slipping when the decking is wet. Treated at high temperatures, the timber's properties are changed, which stops the wood from distorting or cracking...

Decking Boards

What is composite decking?

Composite decking also known as plastic decking is a synthetic material made from wood fibres, HDPE plastics and bonding agents. This mix is heated, formed into board shaped lengths and then cooled to form a wood-plastic composite material that is denser, stronger, and heavier than wood alone. Composite decking is increasing in popularity with homeowners due to its authentic look and low maintenance needs.

If you choose to buy timber decking, although it is a good choice, don’t forget to buy stains or oil to ensure that it looks its best for longer, and keep in mind that there will be some further spend required over the lifetime of the decking to maintain it.

Decking Boards are a simple way of transforming your outdoor space into something amazing and are available in a variety of sizes in softwood and hardwood, plus thermally treated options are available.

Wider Decking Boards

Wider decking boards are the most suitable for decking a larger area. If you have a long, thin decking, putting wide boards at right angles to the long side of your decking can give the illusion of a larger decking.

Narrow Decking Boards

Opting for narrow decking boards in a smaller area can create an eye-catching feeling, you will require more decks to cover a smaller space and the eye will perceive the area to be larger than it is merely because of the amount of decking boards

Softwood is always redwood and are treated to UC3u and dedicated for use above ground.

Timber Decking TOP TIP:

The use of a CAMO Marksman Edge allows you to insert hidden deck fasteners discretely into the edge of your board, without any gaps between each plank. This means that the tool can be used on any size of decking. As such, this is an option for use on exceptionally wide boards, however, please note that there won’t be a spacer to guide the user, therefore if you would prefer the use of a spacer, we recommend the CAMO Wide Board Marksman Pro

Where to use Timber Decking Boards
Concrete. Decking Boards are a great solution for covering concrete that has been damaged and become unsightly over a period and, decking boards are a great deal nicer.

Problem Solving

If your garden is renowned for being boggy or generally damp, it’s easy to not want to spend time in it because garden furniture is likely to sink into it. However, decking can help raise your outdoor space above it.

The same goes if you have a particularly uneven garden perhaps because you live on a hill. Decking can be used to create an area that is level for tables and chairs.

Grooved Boards are an ideal option if you are placing them by a pool or water feature, as the grooves allow water to run-off quickly. However, it is important to note that they are only effective for this purpose if they are used in shorter lengths. If you intend/need to use longer decking lengths, Smooth Boards are a better option.

At Howarth Timber & Building Supplies we have a wide range of decking boards, as well as a variety of C16 and C24 timbers that can be used as part of your project. We also offer a wide selection of composite decking, whilst our Garden & Landscaping range will help you to complete your garden 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.

How to guides

Garden decking ideas

Looking for inspiration? Discover how to build a deck that perfectly suits you with so many options to suit outdoor spaces of any size and shape. 

How to build a deck

A step by step guide on how to build a deck.

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