Vertical line gap in rows where I have adjusted the row height

I am making a table where I need to adjust the row height. After adjusting the row height, the vertical lines on my second column do not extend to the correct height (they leave a gap).

\documentclass[11pt]{article}

\usepackage{xcolor,colortbl}
\definecolor{Gray}{gray}{0.85}

\begin{document}
\Large\centering \textbf{APPROVALS} \\
\normalsize
\begin{center}
\begin{tabular}{|p{2in}|p{3.5in}|}
\hline\rowcolor{Gray}
& \centering SIGNATURE \tabularnewline
\hline
Document Owner \\  NAME 1 & \multicolumn{1}{c||}{ } \tabularnewline[15pt]
\hline
Reviewer \\ Someone 1 & \multicolumn{1}{c|}{ } \tabularnewline[15pt]
\hline
Reviewer \\ Someone 2 & \multicolumn{1}{c|}{ } \tabularnewline[15pt]
\hline
Approved: \\ NAME 4 & \multicolumn{1}{c|}{ } \tabularnewline[15pt]
\hline
\end{tabular}
\end{center}
\end{document}


• All \multicolumn{1}{c|}{ } can simply be omitted, by the way. – Mico Mar 9 '16 at 21:37
• Yeah... I added it based on another discussion... Since it didn't work, but didn't change anything I thought I'd keep it so that no one would suggest it. – Charles W Arnold Mar 9 '16 at 21:52

the gaps are because you finished the rows early

Document Owner \\


has no second cell, so does not get the vertical rules in that cell use

Document Owner & \\

• I see! But now I want to fill the cells as they appear in the image. – Charles W Arnold Mar 9 '16 at 21:57

David pushed me in the right direction. The following code makes the table I want.

\documentclass[11pt]{article}

\usepackage{multirow}
\usepackage{xcolor,colortbl}
\definecolor{Gray}{gray}{0.85}

\begin{document}
\Large\centering \textbf{APPROVALS} \\
\normalsize
\begin{center}
\begin{tabular}{|p{2in}|p{3.5in}|}
\hline\rowcolor{Gray}
\multicolumn{1}{|c}{ }& \centering SIGNATURE \tabularnewline
\hline
Document Owner1 & \tabularnewline
NAME 1         & \tabularnewline[15pt]
\hline
Reviewer   & \tabularnewline
Someone 1 &  \tabularnewline[15pt]
\hline
Reviewer   &  \tabularnewline
Someone 2 & \tabularnewline[15pt]
\hline
Approved:  &  \tabularnewline
NAME 4    &  \tabularnewline[15pt]
\hline
\end{tabular}
\end{center}

\end{document}