Environment-friendly roofing systems use this opportunity and have actually shown to double and even three-way the life span of your rooftop. The barrier of plant assists secure the water-proof membrane layer beneath and ensure your rooftop's life expectancy lasts well for decades. A correctly installed, irrigated and conserved living roofing system need to last for up to 50 years. If the plants on your roofing are passing away, or the weeds are taking control of, you need to call P&amp