Elevate Your Exterior Spaces with Wallbarn’s MetalPad EX

In contemporary architecture, every detail matters—especially when it comes to constructing safe, sustainable and visually appealing outdoor areas such as rooftops, terraces, balconies and podium decks. The Wallbarn MetalPad EX shines as a foundation product engineered precisely for these spaces, offering Class A fire‑rated safety, structural integrity and installation ease. Here’s why it’s a compelling choice for designers, contractors and specifiers alike.

1. Class A Fire-Rated Safety

The MetalPad EX proudly holds a Class A1 fire rating under EN 13501‑1:2018 and complies fully with BS 8579, making it a compliant solution for high-rise outdoor decking and paving systems . Importantly, it contains no plastic or rubber—composed entirely of steel with a protective Zintec 200 coating—eliminating risk of combustible elements . This makes it essential for projects governed by strict safety regulations, particularly in high‑rise environments over 18 metres.

2. Exceptional Load-Bearing and Strength

Each MetalPad EX pedestal has been independently load tested to nearly 50 kN—equivalent to supporting approximately 5 tonnes each . With the addition of an optional spreader plate, load tolerance increases to over 70 kN, or around 7 tonnes . Whether installing heavy porcelain slabs or timber decking with planters and furniture, MetalPad EX provides unwavering strength and reliability.

3. Precision Height Adjustment

The pedestal features a threaded stem for millimetre‑precise height adjustment, even after installation of decking or paving—a strong benefit on reactive site plans. This adjustability ensures a perfectly level surface, improving installation accuracy and visual appeal.

4. Self-Levelling & Headpiece Options

MetalPad EX is available with a variety of Class A compliant headpieces, all crafted from metal to maintain fire safety:

• Self‑levelling headpiece enables slope correction up to 5 degrees in any direction, automatically finding a flat upper surface—ideal for multi-directional deck falls.
• Paving headpieces, made from galvanised steel with Zintec coating, secure tiles while allowing consistent drainage gaps.
• Crucifix headpieces, constructed from aluminium, offer a cost-effective paving option with integral fire safety.
• Rail headpieces suit deck substructures using aluminium joists, fastening securely with provided M8 wing‑nut fixings.

5. Intelligent Drainage and Load Distribution

Every pedestal’s 100 mm‑diameter baseplate includes drainage holes, preventing water accumulation. For delicate sub-surfaces like waterproof membranes, an optional 185 mm spreader plate broadens load dispersion, safeguarding underlying materials..

6. Robust Durability and Corrosion Resistance

Constructed from mild steel with a Zintec 200 cathodic corrosion‑resistant coating, MetalPad EX offers exceptional protection against “white rust” and marine conditions . Further independent tests, including neutral salt spray and cyclic corrosion testing, confirm its long-term reliability. With zero rubber or plastic content, the product remains fully recyclable and suitable for Class A installation.

7. Easy and Efficient Installation

MetalPad EX arrives fully equipped with all necessary connectors and headpieces, enabling quick, tools‑free installation . The threaded adjustment stem works even with tiles or decking already laid, reducing rework and speeding up labour times. Compatibility with Wallbarn’s aluminium joists ensures seamless integration into decking substructures.

8. Compliance and Certification

MetalPad EX complies fully with:

• EN 13501‑1:2018 A1 fire test standard
• BS 8579 balcony construction
• Approved Document B (2022 revision) of UK regulations 

These certifications offer peace of mind for specifiers, ensuring adherence to legal and health & safety obligations.

9. Lifetime Warranty and Sustainability

Wallbarn offers a 15‑year limited warranty, with a projected lifespan of 50 years under proper use. Made entirely from recyclable steel, the design supports sustainable construction—minimising environmental impact and long-term waste.

10. Versatile Applications

Whether for high-rise balconies, roof terraces or podiums, MetalPad EX supports an extensive range of surfacing options:

• Porcelain slabs on paving headpieces
• Decking with aluminium joist rail systems
• Green roof interfaces, requiring solid base support
• Complex projects with bespoke slope profiles

Its adjustability and accessory range allow design flexibility and robust structural performance.

Summing Up the Advantages

Final Thoughts

The Wallbarn MetalPad EX provides architects, builders and specifiers with a future-proof support system that excels in fire safety, strength, precision and sustainability. Its adaptability—supporting everything from intricate rooftop terraces to large commercial podiums—ensures design freedom without compromise.

By choosing MetalPad EX, you’re investing in a fire-safe, robust and environmentally responsible solution that streamlines installation, reduces maintenance and delivers long-lasting performance.

For those aiming to craft safe, striking and sustainable outdoor spaces, MetalPad EX stands out as a foundational cornerstone—and a smart specification choice.

To learn more about MetalPad EX or to discuss your next project’s requirements, contact Wallbarn today at 020 8916 2222 or email sales@wallbarn.com.