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Wallbarn M-Tray® SEDUM / Wildflower Green Roof Module 500 x 500 x 100mm


£28.20 Incl. VAT
£23.50 Ex. VAT

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Estimated Delivery: 5-7 working days 


Fully established, hardy sedum and wildflower species are sown into easy to install cassettes and delivered to site for fast and simple installation onto roofs, terraces, podiums, garden rooms, single storey extensions and any flat surface which could benefit from greening.

Just click the trays together for an instant biodiverse roof.

Designed, developed and manufactured in the UK.

 High quality sedum and native perennial wildflowers are grown from seed and fully rooted into a lightweight substrate growing media, for a truly sustainable biodiverse green roof system. Easy, lightweight, mess-free and future-proof.

 Ideal for DIY and self build projects. Installation couldn’t be easier. Trays are delivered stacked onto pallets for easy handling by one person. Simply carry the trays to the deck space, lay them onto a suitable separation layer and click together using the special clips for a tight and secure connection. The plants will grow over and cover the walls of each tray to create an attractive soft landscaping area.

The diverse species mix of native wildflowers is pre-grown in Wallbarn's M-Trays at our own UK nursery. The mixture of flowering sedum varieties provides a basic cover of green plants and will give year-round coverage to the roof system. The wildflowers will grow up and flower throughout the summer and die back into the substrate over winter; returning the next year provided adequate self-seeding has occurred.

The biodiverse mix will attract bees and butterflies and other nature onto the roof space, creating a natural habitat and nature corridors inside built up urban areas.

 Futureproofed - if the roof deck ever needs inspecting simply lift the trays. Unlike roll-out which often involves the removal of tonnes of soil and vegetation, there is no mess, no sharp particles, no machinery required, no risk of damage to the membrane.

 Fire rated – M-Tray® has been physically fire tested and achieves B ROOF t4 EX AP CEN/TS 16459:2019 fire rating classification (see below for more details).


Mature, established vegetation – an instant green roof

Easy connection system creates seamless green roof fast

No loose substrate on the roof

No sharp aggregate damaging your waterproof membrane, blowing away or clogging up drains

Modules packed onto pallets for easy transportation

Easy to transport and install

Ideal for areas with restricted access

Each tray can be carried by hand by one person

Faster, easier installation

Modules are rounded and smooth, so no sharp edges (which might puncture the membrane beneath)

Less disruption to the roof deck

Expert knowledge not required for installation

Optimum drainage for healthy plant growth

Vegetation fully established with strong, healthy growth

Strong root structure reduces dependence on irrigation

This is the opportunity to green up the spaces around your home. Little by little, roof by roof, you can make a difference by creating havens for nature in your home or business.


500mm x 500mm x 100mm deep

Exactly 4 x trays per m2.

Weight maximum 25kg saturated

Accessories we supply for the M-Tray®

Recycled geotextile fabric

Aluminium edging bars (2.4m length x 100mm)

 Fire Rated

M-Tray® modular wildflower roof system has a B ROOF t4 fire rating classification.

 To meet current building regulations for fire stakeholders need to demonstrate that the whole ‘as installed’ roof system has a valid fire certificate, tested in accordance with CEN/TS 1187:2012 Test 4 External Fire Penetration and Spread of Flame and the classifications under BS EN 13501-5:2016 Fire Classification Of Construction Products And Building Elements.

 A roof system when tested to CEN/TS 1187:2012 Test 4 Test Methods For External Fire Exposure To Roofs should achieve a European classification rating of B ROOF t(4).

 Under Approved Document B only a test report to BS EN 13501-5:2016 for the exact construction or an EXAP report proves compliance; unless the green roof build-up from the deck to the finished surface includes a minimum 80mm of growing medium with less than 50% organic content.

 M-Tray® by Wallbarn was tested according to CEN/TS 1187 and has both a Classification of B ROOF t(4) and an EXAP Report carried out in conformity with CEN/TS 16459:2019.

Furthermore, the growing medium is 100mm thick and contains less than 50% organic content. It complies both to BS 8616:2019 and the GRO Code.

 This is construction law in England. Similar laws apply in the building regulations of Wales, the building regulations of Northern Ireland and in the Technical Handbooks for Scotland.

Deliveries are made on the basis the customer can accept the goods, or willingness to off load the goods, or having means of mechanical offload, this also applies to heavier items such as pallets etc. All deliveries are made ‘kerbside’ and often it can be at the discretion of the driver. A large majority of deliveries would be made on a large rigid tail-lift vehicle and off loaded via a pallet truck and only on to flat surfaces such as tarmac, concrete and pavers. If you do have restricted access, please contact us prior to placing your order. We will always try to accommodate your needs. If a delivery fails due to access, we reserve the right to make a re-delivery charge. All delivery charges are calculated when checking out. The delivery charges included are for the Mainland UK only and do not apply to the Scottish Highlands, or Isles off the Mainland. Additional charges may apply for deliveries that aren’t classed within the Mainland (this is classed by ourselves, suppliers and couriers) Please contact us on 01752 466151 or Due to the nature of our business model, this can mean your order will be sent via multiple deliveries. Whilst we will make every effort to deliver your goods within the stated/requested time frame, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules, so we would recommend the end user not to start/schedule any work until the goods arrive. Due to logistics of various couriers and suppliers we are unable to give times of deliveries. However, please call or email us on the day of the delivery and we will try to get an approximate time. Deliveries can take place from as earlier as 07:30 right up to 18:00 depending on the courier/haulier and taking into account local traffic etc.
You have 14 days from receiving your item(s) to return them should you wish to do so. Please contact us should you wish to arrange a refund/return. Any product marked cut to size, bespoke or made to order are non returnable and excluded from our refund policy.
  • Hi there, I’m looking at installing this product on my bike shed. What layers do I need underneath? Can they be taken out of the trays too? Thanks

    As long as the roof is secure and waterproof, you just lay a geotextile loose on the roof then sit the trays on top. If you want you can also use the decorative aluminium trim around the edges. You cannot take the sedum out of the trays.

    You can have a look at the installation guide by clicking here.

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