Adjustable Decking Pedestals
Adjustable decking pedestals are strong, height-adjustable support systems designed to create raised decking installations on flat roofs, balconies, terraces and other outdoor spaces. Made from durable polypropylene or metal, they provide a stable foundation for decking joists and subframes.
Which Decking Pedestal System Is Right for You?
Not sure which pedestal system is best for your project? Speak to our team for guidance on height ranges, joist compatibility and load requirements.
Plastic Pedestals
Best for residential decks, terraces, and standard raised installations.
Metal Pedestals
Best for heavy-duty commercial decks and fire-rated applications.
Low-Height Pedestals
Best where build-up height is restricted and minimal clearance is available.
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Fast Delivery
Orders over £1200 are delivered free of charge
Trusted Warranty
Peace of mind with long-lasting protection
Trade Discounts
Exclusive discounts for installers and contractors
10% Pledge
We donate 10% of profits to sustainable causes
Decking Pedestal Accessories
Maximise the performance of your pedestal installation with our full range of compatible accessories. Each component is engineered to deliver a long-lasting and level installation across decking and paving systems.
Joist Cradles
Joist cradles sit on top of adjustable pedestals, providing a stable base for aluminium or recycled plastic joists.
View Joist Cradles
Slope Correctors
Slope correctors compensate for falls in the substrate layer to help you achieve a level upper surface.
View Slope Correctors
Support Joists
Aluminium and recycled plastic joists integrate with pedestal systems, providing long-lasting support.
View Joists
Installing Adjustable Decking Pedestals
Adjustable pedestals are designed to make decking installation faster and more precise. With simple height adjustment and compatible accessories.
Position and adjust your pedestals
Start by placing the pedestals onto the surface and using the built-in screw thread to adjust the height of each pedestal, ensuring a base that follows the intended slope or fall.
Lay joists on joist cradles
Once level, fit your joists into place using joist cradles. Joists can be aligned and secured quickly, creating a rigid substructure ready for decking board installation.
Complete with decking boards
Finish the installation by fixing your decking boards onto the joists using the recommended fastener system.
Adjustable Decking Pedestal FAQs
If you don’t find the answer you're looking for, our team of experts is here to help. Give us a call on 020 8088 4888
No, composite decking will not rot, one of its biggest advantages over traditional timber. Composite decking boards are made from a blend of recycled wood fibres and high-performance plastics, creating a dense, moisture-resistant material that resists the fungal growth and decay associated with natural wood.
Unlike timber, which can absorb water and break down over time, eco-friendly outdoor decking made from composite materials is specifically engineered to be low-maintenance and long-lasting—even in wet or humid environments.
Moisture resistance: The plastic content repels water, preventing it from seeping into the board.
No organic breakdown: With no exposed wood grain, there’s no food source for fungi or mould that cause rot.
Capped protection (on some ranges): Premium capped boards have an added polymer shell for even greater protection against moisture, staining, and mildew.
If you're looking for a decking solution that resists the elements and avoids the pitfalls of rotting wood, composite decking boards are a reliable and sustainable choice for both residential and commercial projects.
Composite decking is designed for long-term colour stability, but some initial fading or lightening is normal, especially in uncapped boards. This early change is due to UV exposure and the natural bleeding of tannins from the wood fibres within the board.
Tannin leaching: During the first 8 - 10 weeks after installation, especially in wet weather, tannins from the wood content may leach out of uncapped boards. This can temporarily darken or stain the surface but is a normal part of the weathering process and usually washes away naturally.
UV exposure: Like any outdoor material, sunlight can cause surface fading. With composite decking, this typically results in a slight lightening that stabilises quickly.
Uncapped composite decking: May show more visible tannin marks and minor colour change initially, but these boards settle into a consistent tone over time.
Capped composite decking: Features a durable polymer shell that resists both UV damage and tannin staining, offering superior fade resistance and longer-lasting colour.
Once early weathering is complete, composite decking boards settle into a consistent tone and require no painting or staining. It’s a simple, low-maintenance way to create a great-looking outdoor space that stays that way.
No, composite decking is designed to offer excellent slip resistance, even in wet conditions. While no outdoor surface can be entirely slip-proof, especially in areas prone to standing water or algae, most composite decking boards outperform traditional timber due to their engineered textures and low-porosity surfaces.
Textured surface finishes: Composite boards are manufactured with slip-resistant patterns, such as grooves or embossed woodgrain, that provide reliable grip underfoot.
Low water absorption: Unlike timber, composite decking boards do not swell or become slippery as they absorb water. Their material composition resists moisture ingress, reducing long-term hazards.
Correct deck installation is essential. A slight fall or slope allows water runoff, preventing puddling that can lead to slippery areas.
Routine cleaning helps maintain optimal performance. Keeping the surface free from organic debris, algae, and mould is key to long-term slip resistance.
When properly installed and maintained, composite decking provides a safe and reliable solution for outdoor spaces.
Composite decking is a man-made building product manufactured with a blend of wood fibres, plastic polymers and a small amount of bonding agents. This mix is heated, formed into board shaped lengths and then cooled.
Recycled wood fibres: Typically sourced from sawdust or reclaimed wood, these fibres provide the deck board with strength and a natural grain-like texture.
Recycled plastics: High-density polyethylene (HDPE) or polypropylene is used to bind the board together and add moisture resistance. These plastics are often sourced from post-consumer waste such as packaging or plastic bottles.
Additives and binders: Colour pigments, UV inhibitors, and bonding agents are added to improve fade resistance, colour consistency, and structural stability.
Capped composite decking includes a protective polymer shell that surrounds the core, providing enhanced resistance to staining, fading, and moisture.
Uncapped composite decking boards are more affordable but may be more susceptible to early weathering or surface marking.
This eco-friendly outdoor decking solution not only diverts waste from landfill but also offers excellent durability and aesthetics with minimal upkeep.
The best composite decking depends on your specific style and needs: budget, location, intended use, and aesthetic. However, in general, capped composite decking boards are considered the highest-performing option on the market today due to their enhanced durability, stain resistance, and long-term colour retention.
Capped boards: These include a protective polymer shell that surrounds the core, offering superior resistance to fading, moisture, mould, and staining. Ideal for high-traffic areas or exposed outdoor spaces.
High slip resistance: Look for boards with textured surfaces or anti-slip certifications, particularly important for commercial spaces or wet climates.
Warranty coverage: Leading manufacturers offer warranties of 15–25 years or more, covering structural performance and colour stability.
Sustainable manufacturing: The best eco-friendly outdoor decking options are made from up to 90% recycled materials and manufactured using renewable energy.
The best composite decking balances performance, aesthetics, and sustainability. Whether you’re building a family-friendly outdoor retreat or specifying materials for a commercial project, investing in a high-quality, low-maintenance decking system ensures lasting value and professional-grade results.
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Plan Your Project With Our Decking Calculator
The decking calculator is designed to provide a quick estimate based on standard installation assumptions. For a detailed and accurate quote (especially if your project has unique requirements) we recommend getting in touch with our expert team on 020 8088 4888.
Choose your decking
The calculator will factor in board dimensions, coverage area, and recommended fixings.
Enter your dimensions
Enter the length and width of your area, the calculator will generate a tailored list of materials.
Estimate in minutes
In just a few clicks, you’ll have a breakdown of how many boards and fixings your project needs.
Why Use Adjustable Pedestals for Decking?
Adjustable pedestals offer a low-disruption alternative to traditional groundwork. They allow you to quickly create a level, stable base for joists with no need for digging or concreting.
Precise height adjustment
Easily fine-tune the height of each pedestal using the screw mechanism for quick levelling across uneven substrates.
No digging or concrete required
Pedestals sit freely on most stable surfaces, speeding up installation and reducing labour costs.
Supports ventilation and drainage
Raising the deck off the ground allows air to circulate beneath the boards and joists, helping to prevent moisture build-up and prolonging the life of your decking system.
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Compatible Decking Finishes for Pedestals
Adjustable decking pedestals form the foundation for a wide range of high-performance decking finishes.
Composite decking
Decking pedestals pair perfectly with joist-based composite decking systems, suitable for both residential gardens and commercial terraces.
Aluminium decking
For non-combustible build-ups, aluminium decking installed over adjustable pedestals offers Class A fire performance.
Fibre cement decking
Ideal for balcony and terrace builds, fibre cement decking boards can also be installed using adjustable pedestals.
Where To Use Adjustable Decking Pedestals
Adjustable decking pedestals are the ideal solution for a wide range of applications where a traditional ground-level build-up isn’t possible or practical.
Balconies and roof terraces
Pedestals are widely used in balcony and terrace installations, creating a free-standing raised substructure that protects waterproof membranes while complying with regulations.
Garden landscapes and patios
Ideal for raised terraces or uneven ground, especially when wanting to avoid concrete or timber foundations.
Walkways and access zones
Support walkways or access zones between buildings. Offers stable footing with space for services below.
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All wood materials we use are FSC® certified
Member of World Land Trust's Carbon Balanced Programme
We donate 10% of our profits to Rainforest Trust UK
