Wallbarn M-Tray Modular Green Roof System

Create a lush, living roof in no time with the Wallbarn M-Tray – a ready-to-go modular green roof solution designed for fast, clean, and beautiful installations. Each M-Tray® unit contains mature, UK-grown sedum plants set in a specially engineered substrate, allowing for an instant transformation of dull roof spaces into vibrant, eco-friendly habitats. These lightweight trays are easy to carry and click neatly together, forming a seamless layer of established vegetation. No waiting around for plants to grow or blend-M-Trays® start looking like a continuous green carpet from day one. Perfect for both residential and commercial projects, M-Trays are designed with 100mm deep planting cavities to support healthy root development, while smart drainage channels encourage strong, long-lasting growth. With no sharp edges or loose materials, installation is clean, safe, and low-impact on both the plants and your building. Ideal for tricky spaces such as single-storey extensions or commercial rooftops where traditional roll-out green roofs are difficult to manage, the modular format means the trays can be easily carried into position-even through narrow doorways or up stairwells. Need access to the roof deck later? No problem-simply lift individual trays without disturbing the rest of the roof.

Key Benefits of the M-Tray® System:

Pre-planted with mature sedum for instant green coverage Easy-to-handle trays that simply click together Grown from seed at Wallbarn’s own nurseries in the UK Specially formulated substrate promotes plant health and longevity Deep-root cavities (100mm) for strong, healthy growth Integrated drainage system for improved plant resilience Fire-rated to B ROOF (t4) with EXAP certification (CEN/TS 16459:2019) No mess, no sharp edges, and minimal disruption to your site

FAQs – Wallbarn M-Tray® Modular Green Roof

Can I walk on the M-Tray® green roof after installation?

The M-Tray® green roof is not designed for regular foot traffic. Occasional light access (for maintenance) is fine, but always walk carefully and use stepping boards if necessary to avoid damaging the vegetation.

How soon do the trays blend together visually?

The sedum plants are already well-established, so the trays start blending almost immediately after installation. Within a short time, the joins between trays become barely noticeable, forming a lush, continuous surface.

What happens if I need access to the roof deck later on?

One of the key benefits of the M-Tray® system is flexibility. Individual trays can be lifted out and replaced without disturbing the rest of the roof, making maintenance and inspections quick and simple.

Check out our other products here.

Explore more from our range here.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.