Jacques Maghoma's penalty handed Burton a sixth home victory in a row after a closely contested game with Barnet.
Billy Kee had already missed a good chance for the hosts before Maghoma converted from the spot after he had been fouled by Barry Fuller.
Ibra Sekajja missed from seven yards for Barnet after good work by Ricky Holmes, before Kee curled wide.
Calvin Zola also shot wide and was denied by Stack, but Maghoma's strike proved enough to claim the points.
VIEW FROM THE DRESSING ROOM:
Burton Albion manager Gary Rowett told BBC Radio Derby:
"At this stage of the season it's not really about performance - it's about winning the game.
"We had a bit of a question to the fourth official and said look, "he's given the penalty and is about to pull the trigger so it has to be at least a yellow".
"I think it's important we defend manfully. We've got to do that to win any game and I'd like to see us also get out and put a bit more pressure on the ball at times."
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Live Text Commentary
Full Time The referee ends the match.90:00 +2:00
Unfair challenge on Barry Fuller by Jacques Maghoma results in a free kick. Direct free kick taken by John Oster.88:03
The referee blows for offside against Ricky Holmes. Indirect free kick taken by Stuart Tomlinson.87:02
Harry Crawford gives away a free kick for an unfair challenge on Zander Diamond. Free kick taken by Stuart Tomlinson.85:20
Ibra Sekajja is ruled offside. Stuart Tomlinson takes the free kick.84:34
Free kick awarded for an unfair challenge on Ricky Holmes by Adam Drury. Direct free kick taken by Mark Byrne.82:59 Substitution
Substitution Andrew Yiadom goes off and Clovis Kamdjo comes on.82:59
Robbie Weir fouled by Mark Byrne, the ref awards a free kick. Stuart Tomlinson takes the free kick.81:18
Unfair challenge on Mark Byrne by Lee Bell results in a free kick. Direct free kick taken by Andy Iro.81:08
The offside flag is raised against Robbie Weir. Free kick taken by Graham Stack.79:55 Substitution
Substitution Calvin Zola goes off and Jack Dyer comes on.75:38
Corner taken right-footed by Lee Bell, Ian Sharps challenges Graham Stack unfairly and gives away a free kick. Graham Stack restarts play with the free kick.74:59
John Oster gives away a free kick for an unfair challenge on Robbie Weir. Direct free kick taken by Stuart Tomlinson.73:11
Harry Crawford produces a right-footed shot from the edge of the area and misses to the left of the target.71:16 Substitution
Substitution Harry Crawford joins the action as a substitute, replacing Curtis Weston.71:16
Corner taken by Lee Bell, Anthony O'Connor produces a header from inside the area that goes over the bar.70:51
Calvin Zola takes a shot. Save made by Graham Stack.70:34
Ricky Holmes sends in a cross.65:15 Substitution
Substitution Billy Kee leaves the field to be replaced by Matthew Paterson.63:55
The assistant referee flags for offside against Ibra Sekajja. Stuart Tomlinson takes the free kick.
The ball is sent over by Robbie Weir, Effort on goal by Calvin Zola from inside the penalty box misses to the right of the target.60:07
The ball is sent over by Adam Drury, Shot from close range by Billy Kee misses to the right of the goal.58:43
Lee Bell concedes a free kick for a foul on Mark Byrne. John Oster has an effort direct from the free kick.58:04
The assistant referee signals for offside against Calvin Zola. Graham Stack takes the free kick.56:47
Andrew Yiadom delivers the ball, clearance made by Zander Diamond.55:20
Corner taken by John Oster from the left by-line, clearance made by Zander Diamond.53:24
The ball is crossed by Mark Byrne, Header from deep inside the penalty area by Ibra Sekajja goes harmlessly over the crossbar.51:47
A cross is delivered by Adam Drury, Andy Iro makes a clearance.50:49
Long range shot from Robbie Weir misses to the left of the goal.47:33
Calvin Zola is caught offside. Graham Stack restarts play with the free kick.46:23
Outswinging corner taken by Lee Bell from the right by-line, Header on goal by Calvin Zola from inside the box goes harmlessly over the target.45:32
The offside flag is raised against Ibra Sekajja. Stuart Tomlinson restarts play with the free kick.45:01
The referee blows his whistle to start the second half.45:00 +1:10 Half time
Half Time The players leave the pitch at half time.45:00 +0:21
Free kick awarded for a foul by Adam Drury on John Oster. John Oster takes the free kick.42:56
John Oster is penalised for a handball. Anthony O'Connor takes the direct free kick.41:51
Free kick awarded for a foul by Barry Fuller on Jacques Maghoma. Damien McCrory takes the direct free kick.40:18
Corner from the right by-line taken by Lee Bell, Headed effort from deep inside the area by Zander Diamond misses to the right of the goal.37:51
The referee blows for offside against Ricky Holmes. Stuart Tomlinson takes the free kick.37:14
Curtis Weston fouled by Lee Bell, the ref awards a free kick. Curtis Weston takes the direct free kick.35:52
Ibra Sekajja produces a right-footed shot from deep inside the six-yard box which goes wide of the right-hand post.35:40
Ricky Holmes takes a shot. Zander Diamond gets a block in.35:19
Damien McCrory produces a cross, clearance by David Stephens.33:48
Inswinging corner taken left-footed by Damien McCrory, Curtis Weston manages to make a clearance.28:06
Billy Kee has an effort at goal from just inside the box that misses to the right of the goal.26:55
Handball decision goes against Ibra Sekajja. Ian Sharps takes the direct free kick.25:49
Billy Kee challenges Andy Iro unfairly and gives away a free kick. Andy Iro restarts play with the free kick.23:26
Corner from right by-line taken by Lee Bell.19:11
Corner taken by John Oster, clearance by Calvin Zola.19:01
John Oster produces a cross, clearance made by Damien McCrory.16:03
Effort on goal by Jacques Maghoma from 25 yards. Blocked by Mark Byrne.14:23
Mark Byrne has a drilled shot. Save by Stuart Tomlinson.13:42
Free kick awarded for an unfair challenge on Andrew Yiadom by Damien McCrory. Direct free kick taken by John Oster.12:43
Corner taken by John Oster played to the near post, Lee Bell manages to make a clearance.11:37
Andrew Yiadom is caught offside. Indirect free kick taken by Stuart Tomlinson.10:25
Ricky Holmes has an effort at goal from deep inside the area missing to the left of the target.8:32
Ricky Holmes sends in a cross, save made by Stuart Tomlinson.5:36
Outswinging corner taken by Lee Bell from the right by-line, Headed effort from inside the box by Calvin Zola misses to the right of the target.4:14
Andy Iro takes a shot. Save by Stuart Tomlinson.3:47
Andrew Yiadom fouled by Robbie Weir, the ref awards a free kick. John Oster takes the free kick.3:24 Goal scored
Goal! - Jacques Maghoma - Burton 1 - 0 Barnet Penalty taken right-footed by Jacques Maghoma and scored. Burton Albion 1-0 Barnet.1:51
Foul by Barry Fuller on Jacques Maghoma, Penalty awarded.0:46
Billy Kee takes a shot. Andy Iro gets a block in.0:00
The match begins.
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