Benefits of Sub-surface Irrigation on Green Roofs

• Provides consistent moisture allowing plants to become established
• Keeps plants alive and healthy during periods of drought
• Eliminates water waste via surface evaporation, misting and wind
• Decreases the probability of weed colonization
• Eliminates unsightly surface drip lines and hoses
• Directs moisture to the roots reducing surface fungus and mildew
• Through capillary action, creates a wetted area up to 45% larger than a surface drip system
• Eliminates costly and often dangerous hand watering
• Reduces fire danger by maintaining roof lushness
• Eliminates splash damage to roofing components caused by hand-watering

Remember, all of the benefits of a green roof are possible only if the roof is green and transpiring. In other words:

It ain’t green, if it ain’t green.