Are you thinking about installing decking in London? If so, we recommend you read this first. Whether you’re upgrading your garden, creating a dedicated space for outdoor entertainment or need a safe space for your children to play, installing decking can be one of the most exciting and rewarding projects you can undertake. But, without the right materials, preparation, planning and execution, decking installation can quickly go wrong. At Fencing Supplies London, we specialise in high-quality decking boards and timber supplies, and while we don’t offer installation, we want to make sure that you’re fully prepared so that your DIY installation runs smoothly.
In this blog post, we’ll walk you through the Top 5 Mistakes to Avoid When Installing Decking in London, and we’ll also show you exactly how Fencing Supplies London can support your project with high-quality, affordable decking supplies delivered directly to you. Ready to buy decking in London? View our full range of high-quality decking options here!
Top 5 Mistakes to Avoid When Installing Decking in London
DIY decking installation is entirely achievable for most homeowners, especially with a bit of preparation and the right materials. However, even the most experienced DIYers can fall into traps when installing decking that can lead to structural instability, uneven surfaces, water pools, expensive repairs and replacements, and more. Here are the top 5 mistakes to avoid when installing decking in London…
- Neglecting Ground Preparation & Drainage
One of the biggest mistakes homeowners make when installing decking is assuming the ground beneath doesn’t need special attention. Without consideration, your decking could sink over time, water could pool beneath or on top of the decking and mould and rot can form quickly. To stop these issues from arising, there are several things you can do:
- Clear and level the area properly.
- Use landscaping fabric to prevent weed growth.
- Install a gravel sub-base to aid drainage.
- Consider using concrete decking blocks or ground screws for stability.
We strongly recommend taking ground preparation and drainage seriously – poor preparation at the start will be significantly more expensive later on.
- Using the Wrong Type of Timber
Choosing the right type of timber is essential to the success of your decking. Selecting the right type means that you don’t have to worry about warping, cracking or rotting, and that your decking is protected throughout the year and in all seasons. At Fencing Supplies London, we offer a range of high-quality timbers, specifically for decking, including:
These timber decking boards are perfect for any outdoor project. They are pressure-treated and tantalised for extra durability and longevity, making them ideal for any decking project. They are easy to install and create a stunning, unique look for any outdoor space. Plus, they are a great value for money, so you can get the job done quickly and easily.
Our C24 Treated Carcassing Timber is a premium-grade structural timber ideal for decking. Kiln-dried for enhanced stability, this timber offers excellent resistance to warping, twisting and shrinking, ensuring long-term structural integrity even in changing weather conditions. Graded to C24 strength class, this timber is robust and gives you confidence in your decking.
If you’re unsure which type of timber is best for your decking project, please don’t hesitate to get in touch with Fencing Supplies London today. We can provide trusted recommendations and advice.
3. Forgetting to Allow for Expansion & Contraction
It’s important to remember that timber is a breathable and flexible material. Even treated wood expands and contracts with fluctuating humidity and temperatures. If you screw boards too tightly or forget spacing altogether, you’re setting yourself up for warping and buckling further down the line.
We recommend:
- Leave a small gap between each deck board.
- Avoid tightening screws too deeply.
- Use stainless steel decking screws to resist corrosion.
- Use spacers during installation for consistent gaps.
The right decking installation method adds years to the life of your decking and keeps it looking as good as new for longer.
4. Overlooking the Importance of a Solid Frame
Think of your decking frame like the foundations of your home. If it’s wobbly, uneven, or poorly constructed, everything on top will eventually fail and require repairs or replacement. This is particularly important if you’re building on uneven terrain or a sloped garden. We strongly recommend using C24 Treated Timber for the subframe for your decking, like our 4.8m x 47 x 150mm C24 Timber. It’s strong enough to bear heavy loads and is treated to resist decay. This means that you can enjoy peace of mind that your decking will continue to be stable and secure for years to come.
5. Ignoring Maintenance & Aftercare
Successfully installing decking is a huge achievement, but the work doesn’t end there. Decking, like any outdoor structure, requires seasonal care to help it look good and function as it should. Here are some decking maintenance tips to help your decking last for years:
- Regularly clean debris between grooves and boards.
- Reapply protective sealants.
- Don’t let mould, dirt and grime build up.
- Use a soft-bristle broom and pressure washer for effective cleaning.
- Apply decking stain for UV and moisture protection.
- Replace damaged boards before they cause more significant issues.
Remembering to maintain your decking is the key to ensuring it’ll continue to reward you for years. For more information, please don’t hesitate to get in touch with us today!
By avoiding these common decking installation mistakes, you’re giving yourself the best shot at a beautiful, long-lasting decking space – perfect for BBQs, parties, or relaxing weekends in your own outdoor sanctuary.
The Benefits of Installing Decking at Home
Installing decking at home is a great way of enhancing your lifestyle, adding value and making the most of your outdoor space. Here’s why installing decking at home is a great decision to make…
- Creates a Versatile Outdoor Living Space
Decking can transform your garden into an extension of your home’s living spaces. It’s perfect for summer BBQs, entertaining friends and family, morning coffee in the sun, or simply relaxing with a book. Whether you want a modern patio area or a natural retreat, decking gives you the flexibility to design a space that suits your lifestyle.
- Adds Value to Your Property
Did you know that high-quality decking can significantly boost your home’s appeal to potential buyers? Buyers are usually drawn to homes that offer well-maintained outdoor areas for entertainment, relaxing and more. A stylish, well-installed decking space can make a lasting first impression that boosts your home’s resale value.
- Low Maintenance and Easy to Clean
Unlike lawns, which need mowing, watering and more, decking is relatively low-maintenance. With occasional sweeping and seasonal treatments, your decking will stay looking fresh for years. Grooved boards, like the ones we offer at Fencing Supplies London, also help channel away water, reducing moss and grime build-up.
- Ideal for Uneven or Unusable Ground
If your garden is sloped, patchy, or has poor soil, installing decking can instantly create a level and usable surface. Rather than paying for expensive landscaping or excavation, a raised deck built on treated carcassing timber provides an attractive, cost-effective solution that can adapt to your terrain.
- Customisable to Suit Your Style
Decking isn’t one-size-fits-all. With a variety of board lengths, widths and finishes available, you can tailor your design to suit your space and taste. Whether you prefer a classic timber look or something more contemporary, decking can be stained, oiled, or painted to match your vision.
- Quick & Straightforward Installation
Compared to patios or extensions, decking is relatively quick to install, especially if you’re going the DIY route. With high-quality materials like our C24 graded carcassing timber, you can build a safe and robust structure without needing specialist equipment or extensive groundwork.
- Eco-Friendly & Sustainable Options
Pressure-treated timber decking is durable and can also be a sustainable choice, especially when sourced responsibly. All of our timber at Fencing Supplies London is carefully selected and treated to ensure long-lasting performance, reducing the need for replacements and waste over time.
Whether you have a compact garden or a spacious outdoor area, decking is a smart and stylish way to bring your outdoor vision to life. With the right materials and a well-thought-out design, it becomes a valuable extension of your home, a space you’ll enjoy for years to come.
How Fencing Supplies London Can Help
At Fencing Supplies London, we specialise in supplying premium materials so that your DIY installation is straightforward. Whether you’re a first-time DIYer or an experienced tradesperson, we stock everything you need for robust, attractive and weather-resistant decking.
Our decking products include…
Grooved Decking Boards
Perfect for grip and water drainage, our grooved decking boards are available in various lengths:
Treated Carcassing Timber (C24 Rated)
Our treated carcassing timber is ideal for creating robust subframes that stand the test of time:
Unsure which type of timber you need for your decking? Contact us today for expert advice!
Build it Right & Enjoy it for Years
When installed correctly, decking can quickly become a natural extension of your home – a place to gather, relax and enjoy the sunshine. But it all starts with avoiding the common mistakes and sourcing your materials from a supplier you can trust. At Fencing Supplies London, we’re here to help you get it right from the very beginning. Browse our full range of decking boards and timber today at Fencing Supplies London, or get in touch with our friendly team for tailored advice.
FAQs
Can I install decking myself, or do I need a professional?
You can absolutely install decking yourself with the right tools, preparation, and quality materials. Just avoid the common mistakes listed above.
What’s the best timber for decking in London weather?
Treated softwood decking, like our grooved boards, is ideal. Always choose pressure-treated timber to handle the damp British climate.
How do I calculate how much decking I need?
Measure your area (length x width) in metres, then allow extra for cuts, wastage, and spacing. Contact us for help with accurate estimates.
What tools do I need for a DIY decking project?
Basic tools include a saw, drill, spirit level, tape measure, spacers, and decking screws. A mitre saw and impact driver can also help.
How deep should I dig for decking posts or supports?
If using posts, dig at least 600mm down. If using deck blocks or concrete pads, ensure they sit on compacted sub-base or gravel.
Should I seal or oil my decking after installation?
Yes. Sealing or oiling helps protect the wood from moisture, UV rays, and general wear.
How long does timber decking last?
With proper care and using treated materials, your deck can last 15–25 years or more.
How far apart should decking joists be spaced?
Joists should be spaced no more than 400mm apart to support the decking boards effectively.
Can I install decking on a sloped garden?
Yes, but it requires careful levelling and support. Consider raised decking or using support posts with adjustable feet.
Get your decking project off to a great start with Fencing Supplies London – where quality meets service. View our full range of decking timber here!
