nhlanhla ndlovu is a self-taught bricklayer. while building an outbuilding in the backyard of his parents' home, he got an idea to replace corrugated metal shacks with brick houses. his customers are the people who own the land. they pay for the building in monthly installments using the rent they receive from the tenants, while the tenants themselves g get to live in a better home. plus, the whole thing is more environmentally friendly, as the houses are made of special bricks. nhlanhla: they are more like, almost like lego bricks. so, because they are interlocking, you are actually using 70% less cement. so this actually cuts your building costs by up to 30%. you can use unskilled and semi-skilled labor to actually build with these bricks. you only use a qualified brick layer when you do the foundadations and just the restf the structure when you have to put in the roofing. reporter: nhlanhla ndlovu makes his bricks out of old construction wasaste, so he doesn't need to use sand. that also means the bricks don't have to be fir