Green roofs can be more than just a roof, sure. They help keep a house cooler by adding insulation and letting the plant cover soak up rainwater. The trick is making sure the building can handle the extra weight, so you’ll need a solid structure and a waterproof membrane. Then you add a drainage layer, a root barrier, a growing medium, and finally the plants that fit the climate. It can cost more upfront, but you get better air, less stormwater runoff, and a nicer look. It’s practical if you plan it right, but you gotta check the load, the maintenance, and the local rules before you go green.