The tick lines in the plot are in a layer behind the actual plot. Have a look at this example below:
\documentclass[11pt, oneside]{article}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}[ymin=0,ymax=1,enlargelimits=false]
\addplot
[const plot,fill=blue,draw=black]
coordinates
{(0,0.1) (0.1,0.15) (0.15,0.02) (0.3,0.62)
(0.4,0.56) (0.5,0.58) (0.6,0.65) (0.7,0.6)
(0.8,0.58) (0.9,0.55) (1,0.52)}
\closedcycle;
\end{axis}
\end{tikzpicture}
\end{document}
which produces this plot:

It is clear that the plot has been drawn on top of the tick marks, the tick for 0.2 clearly shows this: it is mostly covered by the plot. I would be grateful if someone could guide me on how I can bring the tick marks ontop of the plot so those ticks on the bottom and right sides that are covered can be seen.
