Two tries from Leroy Houston helped Bath to claim a 29-14 victory from their trip to London Welsh, who remain without a win to their name in 18 Aviva Premiership outings this term.
Rob Webber and Houston went over within the opening 21 minutes at the Kassam Stadium, only for Tom Homer to miss both conversions.
There was no such problem for Welsh's Tristan Roberts, who added the extras after Nic Reynolds had scored a try in the 25th minute, meaning that the hosts went into the break only 10-7 behind.
It was during the second half that the away side took the game away from Welsh, thanks to tries from Sam Burgess, Alafoti Fa'osiliva and Houston again.
Welsh hit back through number eight Opeti Fonua five minutes from time, but it was little more than a consolation try from the Tongan.
The five-try victory has lifted Bath up to third, while Welsh remain rooted to the bottom of the table.