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    Decking

    Outdoor Decking Systems for Trade & DIY Excellence

    Discover our premium outdoor decking range—covering composite and timber boards, frame systems, fixings, and treatments—designed to deliver professional performance or DIY ease in gardens, patios, and rooftop terraces. Whether you’re building a trade project or upgrading at home, our products offer durability, aesthetics, and straightforward installation. Explore related categories like Decking Boards, Decking Frame, and Decking Fixings to complete your layout.

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    Picture of Ronseal Quick Drying Decking Stain Country Oak 2.5L

    Ronseal Quick Drying Decking Stain Country Oak 2.5L

    Free delivery over £250 (Exceptions Apply)
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    £62.02
    Picture of Ronseal Quick Drying Decking Stain Golden Cedar 2.5L

    Ronseal Quick Drying Decking Stain Golden Cedar 2.5L

    Free delivery over £250 (Exceptions Apply)
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    £62.02
    Picture of Ronseal Quick Drying Decking Stain Rich Mahogany 2.5L

    Ronseal Quick Drying Decking Stain Rich Mahogany 2.5L

    Free delivery over £250 (Exceptions Apply)
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    £62.02
    Picture of Ronseal Quick Drying Decking Stain Rocky Grey 2.5L

    Ronseal Quick Drying Decking Stain Rocky Grey 2.5L

    Free delivery over £250 (Exceptions Apply)
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    £62.02
    Picture of Ronseal Quick Drying Decking Stain Teak 2.5L

    Ronseal Quick Drying Decking Stain Teak 2.5L

    Free delivery over £250 (Exceptions Apply)
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    £62.02
    Picture of Softwood Decking Treated Ex 32x125mm 3.6m

    Softwood Decking Treated Ex 32x125mm 3.6m

    Free delivery over £250 (Exceptions Apply)
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    £12.49
    Picture of Softwood Decking Treated Ex 32x125mm 4.8m

    Softwood Decking Treated Ex 32x125mm 4.8m

    Free delivery over £250 (Exceptions Apply)
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    £16.66
    Picture of Timco Decking Screw Green PZ2 4.5x50mm Box 200

    Timco Decking Screw Green PZ2 4.5x50mm Box 200

    Free delivery over £250 (Exceptions Apply)
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    £12.08
    Picture of Timco Decking Screw Green PZ2 4.5x60mm Box 200

    Timco Decking Screw Green PZ2 4.5x60mm Box 200

    Free delivery over £250 (Exceptions Apply)
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    £14.50
    Picture of Timco Decking Screw Green PZ2 4.5x70mm Box 200

    Timco Decking Screw Green PZ2 4.5x70mm Box 200

    Free delivery over £250 (Exceptions Apply)
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    £16.93

    Choosing the Right Decking for Your Garden

    Whether you're building a new garden deck or replacing existing boards, choosing the right materials is important for a durable, attractive finish. At County Building Supplies, we supply timber and composite decking, framing materials, fixings and treatments for professional landscapers, builders and DIY customers.

    Timber vs Composite Decking

    Timber decking offers a natural appearance and is often more affordable initially. Treated softwood decking is a popular choice for garden projects, although regular cleaning and maintenance are important.

    Composite decking generally requires less routine maintenance and doesn't usually need staining or oiling. However, it still requires cleaning and should be installed according to the manufacturer's instructions.

    The best option depends on your budget, preferred appearance and maintenance expectations.

    Choosing Decking Boards & Frames

    When selecting decking boards, consider their dimensions, material, profile and intended use. County stocks treated softwood decking boards, including ex 32 x 125mm options in various lengths.

    A suitable decking frame provides the support beneath the boards. Joist spacing, ventilation and drainage should be considered during installation, following the decking manufacturer's recommendations. Timber used for the frame should also be appropriately treated for its intended exposure.

    Decking Screws & Fixings

    Using suitable fixings helps keep decking boards securely attached to the supporting frame. County stocks TIMCO decking screws in different lengths for appropriate timber decking applications.

    Choose fixings that are compatible with your decking material, timber treatment and outdoor conditions. Some composite decking systems require specialist clips or concealed fixings rather than conventional screws.

    Decking Treatments & Maintenance

    Timber decking is exposed to rain, sunlight and changing temperatures throughout the year. Regular cleaning and suitable treatment can help maintain its appearance.

    County supplies Ronseal decking stains in a range of colours for suitable timber surfaces. Always prepare the decking correctly and follow the treatment manufacturer's instructions before applying a finish.

    Need Advice?

    Not sure which decking boards, fixings or treatments you need? Visit your local County Building Supplies branch or contact our team for advice on suitable products and availability.

    Frequently Asked Questions – Decking

    Is timber or composite decking better?

    Timber decking offers a natural appearance and often has a lower initial cost. Composite decking generally requires less routine surface treatment. The best choice depends on your budget, preferred finish and maintenance requirements.

    What size decking boards do I need?

    The correct board size depends on your decking design and supporting frame. County stocks treated softwood decking boards, including ex 32 x 125mm options. Check the finished dimensions and installation requirements before ordering.

    What screws should I use for decking?

    Use screws suitable for your decking material, frame and outdoor environment. County stocks TIMCO decking screws for appropriate timber applications. Composite decking may require a specific fixing system.

    How far apart should decking joists be?

    Joist spacing depends on the board material, thickness and supporting structure. Always follow the decking manufacturer's installation guidance, as requirements can differ between timber and composite systems.

    How do I calculate how much decking I need?

    Multiply the length of the decking area by its width to calculate the area in square metres. Then use the actual board coverage, including the recommended gaps, to estimate quantities. Allow extra material for cuts and waste.

    How often should timber decking be treated?

    This depends on the treatment used, weather exposure and condition of the timber. Inspect and clean decking regularly, and reapply a suitable treatment according to the manufacturer's recommendations.