Suggestion for House "Condo"

I dont know if I’m the only one who wants this but on the House condo when you put another material on the outer walls you can still see the bumps of the walls, is there any chanve of making the walls completely flat?

This Is very confusing, could you send a screen shot?

I think what he means is when you put another texture on the outside walls, you can still see the model of the slats even tho the texture doesnt show them.