Index: /trunk/styles/standard/elemstyles.mapcss
===================================================================
--- /trunk/styles/standard/elemstyles.mapcss	(revision 12615)
+++ /trunk/styles/standard/elemstyles.mapcss	(revision 12616)
@@ -300,4 +300,6 @@
     fill-color: building#cb9999;
 }
+area[building=roof],
+area[building][!building?!][wall?!],
 area[building:part][!building:part?!] {
     fill-color: buildingpart#dcbbbb;