Surface problem

I have a problem with my building tool. Upon placing the part, some of its surfaces are gone (always the right, left front and back ones). I wanted to remove then all surfaces from the part but the part still had 2 surfaces appearing.
image

In code the part placed is equal to part holo, so I don’t know exactly why this happens. Does anybody know what I could possibly do to remove all surfaces or have part have all surfaces back?