Usually cars of this class can only support about 100lbs on the roof. We have Prius and RAV4 Hybrid with that limitation. The roof racks are still very useful,

Usually cars of this class can only support about 100lbs on the roof. We have Prius and RAV4 Hybrid with that limitation. The roof racks are still very useful, but I wouldn’t put 4x8 sheets of anything on them.