Texture Problem

Today while I was texturing my room. I had a problem where I couldn't get rid of a white line. It was annoying me and I tried various solutions to the problem and to no avail I was about to give up with it.

This is what the problem looked like.

I then finally fixed the problem by reducing the outer shell to 0.14 just big enough to stay outside the room but close enough so the textures connect.

Here is the corrected problem.