A lighter system typically allows you to reroof straight over your existing roof, while the larger ones may need you to tear off the old roofing system and start once again.
A uhlelo lighter ngokuvamile ikuvumela ukuba reroof ngqo phezu kophahla yakho ekhona, kuyilapho asindayo ingadinga ukuthi Dabula ophahleni ubudala futhi uqale kabusha.