When it comes to building, renovating or upgrading a space, choosing the right timber is one of the most important decisions you’ll make. From load-bearing frameworks to fine interior finishes, different timber types are designed for very different jobs – and using the wrong one leads to wasted time, money and effort.
At Ilkeston Ply & DIY, we stock a wide range of high-quality timber to suit both structural and decorative projects, and we’re here to help tradespeople and DIYers make the right choice first time.
Understanding The Main Timber Types
Before selecting timber for your project, it’s essential to understand the key differences between structural timber, treated timber and planed timber.
Structural Timber: Strength You Can Rely On
Structural timber is designed for strength, durability and load-bearing performance. Commonly graded (such as C16 or C24), it’s used where safety and stability are critical.
Typical uses include:
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Floor joists and roof rafters
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Stud walls and frameworks
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Decking subframes and fencing posts
Structural timber is often regularised rather than smooth, prioritising consistency and performance over appearance. If your project involves supporting weight or forming the skeleton of a build, structural timber is the correct and compliant choice.
Best for: Structural, load-bearing indoor and outdoor applications (when treated appropriately).
Treated Timber: Built To Last Outdoors
Treated timber has been pressure-treated with preservatives to protect against rot, fungal decay and insect attack, making it ideal for external environments or damp conditions.
This treatment extends the lifespan of the timber significantly, even when exposed to the elements.
Common applications include:
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Decking frames
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Garden structures and sheds
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Fence panels and posts
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Outdoor steps and sleepers
While treated timber can be structural or non-structural, its main advantage is longevity. For any outdoor project, treated timber is usually essential.
Best for: Outdoor use and areas exposed to moisture.
Planed Timber: Clean, Smooth & Decorative
Planed timber is smooth and visually appealing. It’s ideal where appearance matters and the timber will be seen or touched.
Because it’s finished to a finer standard, planed timber is commonly used for interior joinery and decorative projects rather than structural support.
Typical uses include:
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Shelving and furniture
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Skirting boards and architraves
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Boxing-in pipework
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Feature wall projects
Planed timber is easy to work with and perfect for achieving a professional finish, whether you’re a tradesperson or a DIYer.
Best for: Indoor, decorative and finishing applications.
Choosing The Right Timber For Your Project
When deciding which timber to use, consider these key factors:
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Purpose: Is it load-bearing or decorative?
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Location: Indoors or outdoors?
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Exposure: Will it face moisture, weather or heavy use?
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Finish: Does appearance matter once installed?
For example, a garden deck will require treated structural timber, while an indoor shelving unit will benefit from planed timber for a smooth, clean look. Using the right material ensures safety, longevity and a better overall finish.
Advice You Can Trust
At Ilkeston Ply & DIY, we work closely with builders, joiners and skilled DIYers who need reliable materials that perform exactly as expected. Our team understands the demands of real-world projects and can help you select the most suitable timber for your specific application.
Whether you’re constructing a framework, refreshing an interior space or tackling a large outdoor build, we’ll help you find timber that meets both practical and aesthetic requirements.
Ready To Get Started?
Choosing the correct timber makes all the difference to the success of your project.
Browse our full timber range online or speak to our knowledgeable team for advice.
At Ilkeston Ply & DIY, we supply timber you can trust – for projects that last.