Order of Parts in Tayammum
Question :

If one wiped his hands before his face in tayammum, is it still correct?

Answer :

No, it is not correct, as the sequence within tayammum is necessary. In order to correct the sequence, one can repeat wiping the hands after wiping the face.

The Intention of Tayammum
Question :

Is the intention required in the tayammum?

Answer :

Yes, it is necessary in validity of tayammum to make the intention to get closer to Almighty Allah.