Mvat

An Assessee has taken a contract for painting of complete building .For completing the work it has used scaffolding also. Further after completion of work the assessee has raised 2 bills as one for job work of painting covered under service tax and vat and another bill of scaffolding and only charged service tax on it.Please help me in knowing whether the assessee is right by not charging vat on scaffolding ?It would be even more helpful if some case laws are also shared