[SOLVED partialy]Poly intersection problem

Hello,

I have a problem with rendering.
When rendering it seems that some polys are sticking out of my geometry.Or they apear to bee white lines where they intersect.
While this is a single mesh. see image.

Here you see lines at the windows corners and roof furter away.

can somone tell me what the problem is?

thanx in advance

It seems it has something to do with shaders with no textures.
So for now i will use textures… :smile: