Green roofing systems use this possibility and have actually shown to double and even three-way the life span of your roof. The barrier of greenery helps secure the water-proof membrane layer below and ensure your roof's life expectancy lasts well for years. A properly set up, irrigated and maintained living roof covering must last for as much as 50 years. If the plants on your roof covering are passing away, or the weeds are taking over, you require to call P&amp