Hello,
Try this possibility :
Select only the glasses of your windows and give them a thickness (and check that your normal are outwards on all sides).
Good 
Edit 1
Sorry, I misread your first message 
But check the thickness of your window because for me and in accordance with “Statistics”, “Archimesh” creates single-sided glasses !
Edit 2
Left, Raw “Archimesh” < - > Right, Thickness added to glass
Both with “Archimesh - Glass_material” (IOR 1.500)
Edit 3
If you are ready to use fake glass, there is a solution with single-sided glass (no need to change the thickness) :
this is the material @MartinZ gives here