Izibane zomgca bezisetyenziselwa izibane zangaphandle, ikakhulu ukukhanyiswa komhlaba kunye nokukhanyisa kwe-facade yokwakha.

Ngokuphuculwa kwezibane zokukhanyisa kunye nobuchwepheshe bokulawula, ukusetyenziswa kwezibane ezikhanyayo ekukhanyeni kwangaphandle kunendawo engakumbi yokucinga, kunye nezinto ezahlukeneyo zoopopayi, ubushushu bombala, kunye notshintsho ekukhanyeni nasethunzini zenza izinto zokusebenza ezidlamkileyo