Misconceptions About Suspended Decking & Paving Systems

Suspended decking and paving systems have transformed how we use rooftop spaces, balconies, terraces, and podium decks. They allow these areas to become attractive, usable, and long-lasting outdoor spaces without compromising waterproofing layers beneath.

Our pedestal and rail systems are among the most advanced solutions for creating these elevated surfaces, offering exceptional stability, adjustability, and accessibility. However, there are still common misconceptions about how they work—particularly when it comes to ongoing care and maintenance.

One of the most significant misconceptions is that once these systems are installed, they can be left completely alone for years without any attention. While our systems are designed to be robust, long-lasting, and easy to service, annual maintenance is still essential to ensure drainage systems remain clear, to maintain the aesthetics and safety of the surface, and to comply with warranty conditions.

Misconception 1: “Once installed, you can forget about it.”

It’s easy to assume that a high-quality suspended decking or paving system is completely maintenance-free. Our systems are built for longevity and resilience, but no outdoor surface is immune to the build-up of debris, dirt, or organic matter over time.

Leaves, dust, twigs, litter, and other debris can gather in the gaps between tiles or decking boards and eventually make their way beneath the surface. If this debris is left unchecked, it can block drainage channels, trap moisture, and lead to problems such as standing water, discolouration, or even moss growth.

Annual inspections and cleaning are therefore essential—not because the system itself is prone to failure, but because the surrounding environment will always deposit material onto outdoor surfaces. By removing surface debris and ensuring drainage pathways are clear, you keep the installation performing at its best.

Remember, most waterproofing membrane manufacturers insist on an annual inspection of the flat roof in order to comply with warranties, so these tasks can be carried out as part of this regular process.

Misconception 2: “Because the surface is raised, drainage will always work without intervention.”

One of the major advantages of our suspended systems is that they create a ventilated void between the surface finish and the underlying deck. This space allows rainwater to run freely to drainage outlets, preventing ponding and reducing the risk of water-related damage.

However, this drainage void will only remain effective if it is kept clear. Over time, fine particles, leaf litter, and even sand or grit from the surrounding environment can settle in this space. If left unattended, these deposits can partially or completely block the drainage path. It can also represent a fire risk.

This is why we advise annual inspections beneath the surface. A quick lift of selected tiles or boards to check the condition below can identify any developing issues early, allowing for simple cleaning before blockages become a serious problem.

Misconception 3: “Easy access means no need to check.”

Wallbarn’s systems are deliberately designed so that individual tiles or boards can be lifted easily with specialist tools. For tiles we would always recommend a good quality suction tile lifter, for example. This easy access is one of the system’s greatest strengths—it means drainage inspections, waterproofing checks, and cleaning are all far simpler compared to traditional fixed surfaces.

However, the ease of access should not be mistaken for a reason to ignore maintenance altogether. Just because it’s simple to check underneath does not mean you should delay doing it. Instead, this accessibility should be seen as a practical invitation to make annual checks part of your property’s routine maintenance schedule.

Misconception 4: “If the surface still looks good, there’s nothing to do.”

A suspended surface can remain visually appealing even while hidden issues are developing underneath. For example:

• Debris may be blocking part of a drainage outlet, which is not visible from above.
• Organic matter may be collecting beneath the tiles or boards, creating damp conditions that encourage unwanted plant growth.
• Small objects such as gravel, screws, or litter may have fallen into the void, obstructing water flow.

Without lifting a few sections each year, these issues may go unnoticed until they cause visible problems. Preventative maintenance ensures that the hidden parts of the system remain as healthy and functional as the visible surface.

Why Our Systems Makes Maintenance Straightforward

Our range of pedestals—including fixed, self-levelling, adjustable height models including fire rated no-combustible products —is designed for versatility and practicality. The systems support a wide range of decking boards, paving slabs, and rail-based substructures, allowing for precise levelling and long-term stability.

When it comes to maintenance, the design offers several key advantages:

• Quick removal and replacement – Tiles or decking boards can be lifted in minutes, allowing fast access to the substructure and drainage layer.
• Adjustment Key for raising or lowering the height of the pedestals whilst the slabs are still in place, to reduce the time and effort in lifting slabs in order to change the height. This speeds up retro-fit adjustments and improves health and safety.
• Non-invasive inspection – The modular nature of the system means you can investigate a specific area without disturbing the rest of the installation.
• Durable components – Wallbarn pedestals are engineered from long-lasting, weather-resistant materials which have been proven to last for over 25 years without degradation, meaning the focus of maintenance is typically on clearing debris rather than repairing the system itself.
• Protection of waterproofing – Because the system is suspended above the roof deck, there is no penetration of the waterproofing layer and it is covered from exposure to the elements, reducing the risk of leaks during inspections and extending the lifespan of the membrane.

Annual Maintenance: What to Include

We recommend carrying out a comprehensive check of your suspended decking or paving system at least once a year, ideally in early spring or autumn when weather conditions are mild.

A good annual maintenance routine should include:

1. Surface cleaning – Sweep or wash the surface to remove leaves, dust, and other debris.
2. Tile or board lifting – Select several tiles or boards from different areas and lift them to inspect the condition beneath.
3. Drainage check – Ensure water pathways to the outlets are free from obstructions.
4. Debris removal – Clear any collected material such as leaves, twigs, soil, or litter from the void space.
5. Pedestal inspection – Check pedestals for any signs of displacement or damage. Adjust height if necessary to maintain a level surface.
6. Structural check – If using a rail system, ensure all components remain securely in place.

Why Annual Maintenance Protects Your Warranty

Our systems are built to last and come with strong warranty protection. However, as with any high-quality building product, the warranty is dependent on proper use and care.

Failing to carry out recommended maintenance could compromise your warranty. For example, if drainage blockages cause water damage to the roof structure, and it is shown that the void space was not inspected or cleaned as advised, warranty coverage may be affected.

By keeping records of annual inspections and any maintenance work undertaken, you can demonstrate that your system has been cared for in line with our guidance, ensuring your warranty remains valid.

The Benefits of Proactive Maintenance

Annual maintenance offers benefits far beyond warranty compliance:

• Longevity – A clean, clear drainage path helps extend the life of both the surface finish and the substructure.
• Performance – The system continues to perform as intended, with effective drainage and a level walking surface.
• Safety – Removing obstructions reduces slip hazards and prevents water pooling.
• Aesthetics – Regular cleaning keeps surfaces looking their best year-round.
• Peace of mind – Knowing that the hidden parts of the system are in good condition provides confidence in your investment.

Final Thoughts: Long-Term Success Through Simple Steps

Suspended decking and paving systems are a modern, efficient, and highly attractive way to finish rooftop and terrace spaces. Our pedestals and rail systems are designed to make these installations strong, stable, and easy to care for.

However, the misconception that these systems can be left completely alone after installation is one to avoid. By committing to a simple, annual maintenance routine—lifting a few sections, checking drainage, clearing debris—you protect both the performance and the warranty of your system.

Thanks to our smart, modular design, carrying out this maintenance is quick, simple, and non-disruptive. A few hours once a year is all it takes to keep your suspended decking or paving looking beautiful and functioning flawlessly for many years to come.