SA Roofing September 2017 // Issue: 93 - Page 23

FEATURES Roof gardens have proven to be environmentally friendly. Don’t *#@% around! research is necessary “ when Thorough installing a roof garden.” When working at height, you need the BEST! Installation of roof garden. “Their seeds either arrive with contaminated nursery soils, plants, cuttings root systems compost and other organic growing mediums or they blow directly in from outside sources,” Greenstone says. In addition, Greenstone adds that when the green roof is at an early stage of plant growth, the plant cover is limited and exposes areas of un-vegetated soils which allows weeds a chance to seed without any form of competition. “A weekly weeding regime is essential primarily in the early stages of any green roof development. For instance, several Ficus species (chiefly tropical trees, shrubs and vines) are either blown in from outside sources or take root because of fig-eating birds that pass undigested seeds out while in flight or when they visit green roofs,” says Greenstone. “If implemented correctly green roofs offer a win-win situation that is required for building resilient cities and counteracting the challenges that expanding cities face,” says Ferreira. SA’s Leading Access Rental Company HEAD OFFICE - JHB Unit 6, 36 Ossewa Street, Chloorkop, Tel: 010 594 4357 079 519 6553 KZN 3 Circuit Road, Westmead, Tel: 087 405 0020 082 803 5185 CAPE TOWN 5 Ferrule Ave, Montague Gardens Tel: 021 510 7307 079 873 8251 RESIDENTIAL // COMMERCIAL // INDUSTRIAL SEPTEMBER 2017 21