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Decking

Decking is one of the easiest ways to create a functional and stylish outdoor living space. Whether you’re building a raised platform, extending your patio, or upgrading your garden, our range of decking boards and composite decking offers durable, long-lasting solutions for every project.

At Howarth Timber, we supply both timber and composite decking suitable for trade professionals and DIY customers, with a wide choice of sizes, finishes, and styles.

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    Trex Composite Decking Enhance Square Edge Clam Shell 25 x 140 x 4880mm

    The Square Composite Decking in Clam Shell is part of the Trex Enhance Basics range which aims at being an affordable choice for your outdoor space that doesn't require a lot of maintenance and offers a realistic wood effect. Please note: Timber and...
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    Trex Composite Decking Enhance Fascia Clam Shell 14 x 184 x 3660mm

    The Composite Decking Fascia in Clam Shell is part of the Trex Enhance Basics range and is designed to complement the Clam Shell composite decking boards, offering a neat finish around the edge. The fascia is made from 95% recycled materials but has a...
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    Trex Composite Decking Enhance Grooved Clam Shell 25 x 140 x 3660mm

    The Grooved Composite Decking in Clam Shell is part of the Trex Enhance Basics collection which offers the great combination of being low maintenance with the bonus of an excellent price. The decking offers a woodgrain effect that is realistic and...
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    Trex Composite Decking Enhance Grooved Clam Shell 25 x 140 x 4880mm

    TREX Enhance Basics is available in two monochromatic colours and offers the ideal combination of price and little maintenance. Clam Shell is a grey deck board in a medium tone. The environmentally friendly composite board has a refined wood-grain...
  • clamshell%20square%20board.jpg.jpeg Trex_ColourClamShell.jpg.jpeg

    Trex Composite Decking Enhance Square Edge Clam Shell 25 x 140 x 3660mm

    The Square Composite Decking in Clam Shell is part of the Trex Enhance Basics range which is the perfect combination of being both affordable and requiring only minimal maintenance. The decking is made from 95% recycled materials whilst having the...

Transform your garden with quality decking

Timber decking boards

Timber decking provides a traditional, natural look and is a cost-effective choice for many garden projects. Our treated timber decking boards are designed to resist rot and decay, making them ideal for outdoor use.

Composite decking

Composite decking is a low-maintenance alternative that offers long-term durability. Resistant to weathering, fading, and warping, it’s perfect for modern outdoor spaces.

Decking kits & components

Complete your project with:

Choosing the right decking

When selecting decking, consider:

  • Material – Timber for a natural finish, composite for low maintenance
  • Durability – Treated timber lasts longer outdoors
  • Style – Grooved boards for grip, smooth for a modern look
  • Project type – Raised decks, patios, or garden seating areas

Complete your decking project

Make sure you have everything you need:

If you are working on a new project or renovating an existing outdoor space, pop into your local Howarth branch or browse our website. We also offer Click & Collect and Delivery options.

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Frequently Asked Questions

What timber do I need for decking?
Pressure-treated timber is one of the best options for decking frames because of its affordability.
How many deck boards do I need?
You'll need to calculate the area of the deck in m2 to figure out how many deck boards you'll need. To do this, multiply your deck's length by its width. For example: The length of your deck will be 5 metres, and the width will be 4 metres. 5 x 4 = 20, so the total area of your deck will be 20m2. Then you'll need to figure out how big a single board is. You must double the board's length by its width to achieve this. Finally, divide the deck's area by the area of the deck to figure how much decking you'll need to build your new deck.
What size wood for decking frame?
The most used joist sizes for decking are 2x6, 2x8, 2x10.
Do you need planning permission for decking?
You may need planning permission for decking if it covers more than fifty percent of your garden or is installed more than 30cm off the ground.
What is the best decking material?
Timber decking is affordable and traditional, while composite decking offers long-term durability with minimal maintenance.
How long does decking last?
Treated timber decking can last 10–15 years, while composite decking can last 20+ years.
Do I need treated timber for decking?
Yes, treated timber is recommended as it provides protection against moisture, rot, and insects.

How to guides

Decking - An Ultimate Guide

A helpful article with all the answers to the most frequently asked questions regarding both regular and composite decking in one place!

How to build a raised deck

Need help building a raised deck? We've got you covered with a full step by step guide.

Customer inspiration