Substructure

Sub Floor

The Permeate Sub Floor System from Wallbarn is a highly versatile and robust modular support framework, designed specifically to accommodate landscaping, seating, decking and paving installations on rooftops, balconies, podiums, and terraces. Constructed from non-combustible, Class A fire-rated components, the system ensures safety, durability and ease of installation. The adjustable nature of the system, using MetalPad Ex pedestals in combination with I-Plus aluminium joists and trays, provides flexibility in creating perfectly level surfaces across varying height requirements.

Sub Floor Components:

• MetalPad Ex Pedestals: Height-adjustable covering heights from 26mm up to 375mm.
• I-Plus Aluminium Joists/Rails – Available in three heights: 50mm, 75mm, and 100mm.
• Lightweight, durable, and corrosion-resistant.
• 3mm Thick Galvanised Steel Trays:
• Tray dimensions: 600mm x 540mm.
• Integrated drainage holes for effective water runoff.
• Simple placement onto brackets without mechanical fixing.
• Brackets and Fixings:
  • M8 wing nut kits for securing rails to pedestals.
  • Slide-in brackets for securing trays easily onto the rails.
  • No special tools required for installation.

This Wallbarn designed combination ensures a quick, secure, and reliable installation process, suitable for creating dynamic and versatile landscaped environments.

Planters

The Permeate planter system offers an innovative solution for introducing soft landscaping into urban environments. Designed specifically for rooftops, balconies, podiums, and terraces, the planter system provides opportunities to integrate greenery, enhance biodiversity, and improve air quality in built-up areas. Wallbarn has partnered with Bespoke Metal Planters Ltd to deliver high-quality, tailored planters constructed from aluminium, hot-dipped galvanised steel or Cor Ten steel, ensuring longevity, aesthetic appeal, and resistance to corrosion.

Available in a range of finishes, including powder coating in RAL and BS colour codes, the planter system can be tailored to complement the existing architecture and design scheme of any space. With thicknesses of 3 to 4 mm, these durable planters provide exceptional structural integrity while allowing for optimal root growth and plant health. The modular nature of the system ensures easy installation, enabling rapid transformation of previously under-utilised areas into vibrant and attractive green spaces.

The integrated drainage features of the Permeate planter system ensure efficient water management and prevent waterlogging, protecting plant health and the integrity of the underlying structure. The steel trays with strategically placed drainage holes facilitate rapid water runoff, safeguarding against potential damage or deterioration caused by excess moisture. This well-thought-out drainage design is essential in maintaining the long-term health and sustainability of landscaped spaces.

By integrating the Permeate planter system into your project, you can achieve a seamless blend of soft landscaping with hard landscaping, seating, and other amenities. This holistic approach transforms terraces and rooftop spaces into welcoming and multifunctional environments.

Benches & Seating

The Permeate bench seating solutions provide comfortable, stylish, and practical seating arrangements for any outdoor setting. Designed specifically to complement rooftop gardens, balconies, terraces, and podiums, these benches enhance usability, encourage social interaction, and elevate the aesthetic value of outdoor spaces. The system integrates seamlessly with other elements of the Permeate system, ensuring consistency in design and ease of installation.

Available in responsibly sourced FSC hardwood species, these benches offer both beauty and environmental sustainability. The hardwood selection provides natural warmth, character, and durability, ensuring that seating remains attractive and functional over time. In scenarios demanding stricter fire safety requirements, metal bench seating options are also available, providing a completely non-combustible seating solution without sacrificing comfort or visual appeal.

The modular and flexible nature of the Permeate seating solutions ensures they can be easily customised to fit various configurations and layouts. Whether arranged individually or combined with planters and decking sections, these benches offer flexibility to accommodate diverse spatial requirements and user preferences. Simple installation using the Permeate Sub Floor System means bench seating can be quickly and securely integrated, providing instant enhancements to the outdoor environment.

Hard Landscaping

The Permeate system is designed to accommodate a comprehensive range of hard landscaping solutions to perfectly complement soft landscaping and seating arrangements. These versatile options enable clients to create visually appealing and functional outdoor spaces suitable for diverse environments, including rooftops, balconies, terraces, and podiums.

Decking

The Permeate system provides a comprehensive range of hard landscaping solutions to perfectly complement soft landscaping and seating arrangements. These versatile options enable clients to create visually appealing and functional outdoor spaces suitable for diverse environments, including rooftops, balconies, terraces, and podiums.

Decking is a popular choice within the Permeate system, offering a range of materials tailored to different aesthetic and practical requirements. ExaDeck ceramic decking is a particularly durable and luxurious choice, providing excellent slip resistance, minimal maintenance, and a contemporary finish. Alternatively, CDeck cement fibre decking offers impressive strength, stability, and longevity, making it ideal for areas subject to high traffic and weather exposure.

With its comprehensive selection of hard landscaping materials, the Permeate system allows for creative freedom in designing attractive, durable, and versatile outdoor environments. Whether used independently or combined with other landscaping elements, these hard landscaping options enhance the functionality and aesthetic quality of any outdoor space.

Furthermore, non Class A terrace systems are sometimes possible. For some flat roofs and podium decks. A B-Roof T4 solution is sometimes possible. Therefore, class B bamboo decking could be selected as an alternative. For those seeking a more traditional appearance, timber decking options, including Bamboo Elegance, are available. These materials offer natural aesthetics and warmth, enhancing the comfort and visual appeal of outdoor spaces. The modular system allows easy installation and flexibility, facilitating the incorporation of decking into diverse landscape designs and configurations.

Paving

The Permeate system is designed to work seamlessly with a wide range of paving finishes, including flags, slabs, and high-performance porcelain tiles. These paving options are selected for their durability, low maintenance requirements, and visual appeal—delivering a long-lasting, professional finish to any outdoor space.

Paving is also the ideal surface finish where regular access to the sub-floor is required, such as for cleaning, clearing drainage outlets, or carrying out maintenance on concealed pipework and electrical cabling. Individual slabs or tiles can be lifted and replaced without disrupting the wider surface area, offering a practical and cost-effective solution for ongoing upkeep.

Porcelain paving, in particular, stands out for its contemporary aesthetic and superior performance. It offers exceptional resistance to staining, weathering, and UV fading, making it ideal for high-traffic or exposed environments where both form and function matter.

Soft Landscaping

To further enhance the environmental and aesthetic value of your space, Wallbarn has partnered with Green Roofers UK to deliver complete green scape schemes, offering both intensive and extensive planting systems. Our trusted partner works with us to provide a comprehensive consultation, supply, and installation service to help realise your green landscaping visions effectively and sustainably.

These green scape schemes not only enhance biodiversity by attracting local wildlife and encouraging pollinators, but also significantly improve air quality, regulate building temperature, and reduce urban heat effects. Intensive green roofs allow for deeper substrate layers and support a greater variety of plant life, while extensive systems offer lighter-weight solutions ideal for larger roof areas with low maintenance requirements.

By incorporating green scape systems into your outdoor spaces, you create welcoming and health-promoting environments. These vibrant green spaces offer ideal relaxation areas, contributing positively to employee well-being, reducing stress, and improving productivity. Wallbarn partners with experienced professionals who can fully support the design, supply, and installation of these systems, ensuring successful and sustainable outcomes for your project.

Connectors

Spreader Plate

The Wallbarn Spreader Plate is an optional component designed to disperse weight and minimise point loading on vulnerable subfloors, such as insulation or waterproof membranes. Compatible with MetalPad Ex Pedestals, Class A Fixed Height Pedestals, and Class A Joist Holders, the Spreader Plate significantly enhances the weight tolerance of pedestals. Constructed from galvanised steel with Zintec 200 coating for corrosion resistance, it meets Class A fire rating standards.

Learn More

M8 Wing Nut Kit

Constructed from stainless steel, the M8 Wing Nut Kit securely attaches aluminium rails and joists to MetalPad Ex pedestals, fulfilling Class A fire rating requirements. Its hand-tightened design allows for initial loose assembly, making final adjustments straightforward before firmly securing the structure. It also enables easy attachment of brackets to I-Plus beams, both end-to-end and at right angles, ensuring a robust and flexible installation process.

Learn More

W Clip Hidden Fixing for Decking

The W Clip from Wallbarn is a hidden fixing clip for deck boards, manufactured from electrocoated aluminium, giving it a Class A fire rating—ideal for use within Wallbarn’s comprehensive fire-rated, non-combustible decking system. W Clip provides an attractive hidden fixing solution for deckboards with a central side milling profile, creating a neat 5-6mm gap between boards. The 60mm width is specifically designed for Wallbarn’s aluminium 60mm wide I-Plus and Box Rails, fully concealing the rail beneath once installed.

Learn More

Tray Bracket

This bracket easily slides into the existing grooves of the I-Plus Rails and is secured by the weight of the trays. The installation process is rapid and straightforward, requiring no mechanical fixings.