ceiling
noun
ˈsiːlɪŋ 
ˈsiːlɪŋ 
1 the top inside surface of a roomShe lay on her back staring up at the ceiling.a large room with a high ceilingThe walls and ceiling were painted white.2 the highest limit or amount of somethingprice ceilings compare floor3 (technical) the greatest height at which a particular aircraft is able to flyan aircraft with a ceiling of 20000 feet see also glass ceiling Idioms
see hit the ceiling/roof at hit verb