Lowe admits Iversen, who is on-loan from Leicester City, has been outstanding all season.
"It is fantastic. Our foundation is built on clean sheets. We have to be solid and resolute and they have been amazing," said Lowe.
The coach also had words of praise for Danish goalkeeper Iversen, who is a regular between the posts for Preston.
"He's been great.
"He's understanding our style now, in the end his job is to keep the ball out of the net, and he does for the time being."
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