slate roof(n = noun.artifact) - a roof covered with slate;
is a kind of roof

clean slate, curb roof, french roof, gable roof, gambrel roof, hip roof, hit the roof, hurricane roof, mansard roof, raise the roof, roof, roof garden, roof mushroom, roof of the mouth, roof peak, roof rack, roof rat, saddle roof, saddleback roof, slate, slate club, slate pencil, thatched roof, tile roof