Service tax on cladding work

 Dear all...

Please help me by clarifying a doubt...

Is Glazing and Cladding work fall under the definition of Works Contract... Will notification No. 24/2012 is applicable to this type of Contract..? and if there is any change in the applicability of provisions if service provider obtains some material bills in the name of service receiver ?

Eg : Contract amount                                                              - 19 lakhs,

        Material bill raised in the name of Service Receiver -   2lakhs

        Let me know whether service tax liability of 12.36%  is on the 40% of 17lakhs (19-2)  or entire amount of 19 lakhs ? ?

Thanks and Best Regards,

Sajana E V