please builders in the house, i need hlep from u guys. how much will it cost to roof a three bedroom flate using the original ganah aluminium sink. i am about doing the parapet now.but will like to have idea on how much it will cost me to do the roofing. thank you..[b]please builders in the house, i need hlep from u guys. how much will it cost to roof a three bedroom flate using the original ganah aluminium sink. i am about doing the parapet now.but will like to have idea on how much it will cost me to do the roofing. thank you..[/b]please builders in the house, i need hlep from u guys. how much will it cost to roof a three bedroom flate using the original ganah aluminium sink. i am about doing the parapet now.but will like to have idea on how much it will cost me to do the roofing. thank you..