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Green roofs

Maintenance Schedule for Green Roof Systems

Green roofs are living structures and as such need attention throughout their lifespan.

Some vegetation types such a sedum are planted as they require less maintenance than grass roofs for example. However, regular attention to soil moisture and feed levels, as well as the removal of weeds, is essential to maintain optimum performance.

 

Maintenance of M-Tray® modular green roof

The M-Tray system is a portable, modular system that consists of a specially-designed HDPE tray filled with a blend of mineral and organic substrate and a carefully-selected range of sedum species pre-grown to maturity at our UK nursery.

Spring schedule

  • Remove weeds by hand pulling only
  • Apply Wallbarn slow-release granular fertiliser at a rate of 50gsm
  • Clear debris from drainage outlets
  • Generally, inspect vegetation area and monitor poor growth areas
  • Overseed poor growth areas if required
  • Check irrigation system (if applicable) and replace timer batteries

Autumn schedule

  • Remove weeds by hand pulling only
  • Clear debris from drainage outlets
  • Generally, inspect vegetation area and monitor poor growth areas
  • Overseed poor growth areas if required
  • Check irrigation system (if applicable) and drain down

 

Maintenance of extensive ‘roll-out’ green roof

Extensive rollout sedum roofs are a multi-layered build up consisting of a protection fleece layer under an HDPE drainage tray (Protecto-drain) under a 300gsm re-cycled filter fleece under a loosely laid blend of mineral and organic substrate under a pre-grown sedum blanket or a plug planted sedum vegetation.

Spring schedule

  • Remove weeds by hand pulling
  • Apply Wallbarn slow-release granular fertilizer at a rate of 50gsm
  • Clear debris from drainage outlets
  • Generally, inspect vegetation area and monitor poor growth areas
  • Overseed poor growth areas if required
  • Check irrigation system (if applicable) and replace timer batteries

Autumn schedule

  • Remove weeds by hand pulling only
  • Clear debris from drainage outlets
  • Generally, inspect vegetation area and monitor poor growth areas
  • Overseed poor growth areas if required
  • Check irrigation system (if applicable) and drain down
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