Jesus a roofer?

In the local paper I observed a Fictitious Business Name Statement by a company in Encinitas, CA that read:
1. JESUS IS MY SAVIOR ROOFING CO.
2. J.I.M.S. ROOFING CO.
3. JIM’S ROOFING CO.

If he is such a religious Christian, whatever happened to taking the name of his Lord in vain? Besides, I thought Jesus was a carpenter and he would belong to a different union than the roofers.