The Terriers were widely tipped to be one of the teams fighting nail and tooth for survival in their first ever season in the Premier League but they have settled quickly, and Saturday's 0-0 draw at Burnley was their fourth clean sheet from their first six games, in which they have picked up 9 points.
Goalkeeper Jonas Lossl and defenders Chris Lowe, Christopher Schindler, Mathias Jorgensen and Tommy Smith have played every minute for Huddersfield so far this season and Wagner can see a growing belief in his back line.
"Every point is an important point and every clean sheet brings confidence. We have four," said the German coach.
"I'm very pleased with this clean sheet of course, a fourth in six games. I'm pleased with the defensive effort and how everybody worked. Unfortunately we missed the biggest opportunity of the game, if we were more clinical we get three points out of the game."
Laurent Depoitre was responsible for the miss which Wagner referred to as he failed to find a finish after Tom Ince's fine run and lay-off.
Depoitre said: "We didn't have a lot of chances but when we have one we want to do better.
"I had one good chance at the beginning of the second half and could have done better, but we didn't create so much."