Problem with house model

When I convert 3d Plane into Editable poly its Surface Polygon disappear, Its
Surface polygon not existed on the bottom (where it gone). Also its front
polygons appear to be not there. Is there any option to see polygons from any
side permanently wihout using Flip. I create walls on 3d Plane using Inset with
9" thickness but why this thickness can be seen only from Top & why not
from bottom. (Like in .gif image). Also When I subtract windows from Walls,
Windows r not 3dimensional, why?, 
while in the .gif image walls are 3D. The Bench is luking solid from one side
and luking PLANE from other side pls tell me the option that it looks solid from
both sides. How Door Polygons can be arised like in the (.gif) image. My scene
file cant be attached why