Modular Pre-Grown Sedum Green Roof Tray – 500 x 500mm

A green roof usually means weeks of waiting for a sedum blanket to knit together, or a loose-lay build-up of membrane, substrate and plug plants assembled layer by layer on site. This modular pre-grown sedum tray skips both: each tray arrives already planted with an established mix of drought-tolerant sedum species, complete with its own drainage layer and growing substrate built in, and simply clips together with the next tray to form a continuous, instantly green roof. It suits a garden room, garage, home office, bin store or extension roof where you want a finished, vegetated roof on the day of installation rather than a roof that needs a growing season to fill in – and because each tray is a fixed, known unit, you can order exactly the quantity your roof area needs. Key benefits Arrives fully pre-grown – an established sedum roof from day one, not a bare blanket that fills in over a season Drainage, growing substrate and vegetation all integrated into one module – no separate loose-lay build-up needed Trays clip together for a fast, low-disruption install with minimal on-site cutting Genuinely low-maintenance, drought-tolerant sedum mix once established Sold per tray so you can order the exact number your roof area requires Specification Tray size 500mm x 500mm x 100mm Coverage 0.25m² per tray (4 trays per m²) Weight (dry) Approx. 20kg per tray Weight (saturated) Approx. 25kg per tray (100kg/m²) – confirm your roof structure can carry this loading before ordering Planting Pre-grown mixed sedum groundcover with integrated substrate and drainage Pack options Single tray / Pack of 20 (5m²) / Pack of 40 (10m²) Ordering & installation guidance Measure your flat roof area in m² and multiply by 4 to calculate the number of trays needed, then round up to the nearest pack option below. A root barrier membrane laid beneath the modules is strongly recommended to protect your waterproofing – see our green roof root barrier membrane. For a loose-lay alternative build-up rather than modular trays, see our sedum green roof blanket kit, and for the drainage layer used in a built-up specification see our green roof drainage & water reservoir board. Only paving part of the roof rather than planting it? See our adjustable paving support pedestal system for a free-draining terrace build-up alongside or instead of a green roof area. FAQs Do I still need a separate substrate or drainage layer? No – each tray is a complete, self-contained module with drainage and growing substrate already built in. A root barrier membrane beneath the trays is still recommended to protect the roof's waterproofing layer. Will my roof take the weight? A saturated tray weighs roughly 100kg/m² – always confirm this loading (plus your own build-up and any snow load) with a structural engineer or your roof kit supplier before installing a green roof. How much maintenance does it need? Sedum is drought-tolerant and low-maintenance once established, but an occasional light feed, weed removal and a check of the drainage outlets is recommended, particularly in the first year. Can this go on a pitched roof? Modular sedum trays are primarily designed for flat and low-pitch roofs; for anything beyond a shallow pitch, additional battens or restraint may be required – check with a specialist installer. How quickly does it need to be installed after delivery? As a pre-grown, living product, trays should be installed as soon as possible after delivery – ideally within 48 hours – to keep the sedum in good condition.