First you need to prepare the room.

Before starting to carry out repair work, you must prepare carefully the design of your plans. First you need to prepare the room. If there is a metal fence on your loggia, then it must be removed, and in its place to install a brick parapet. But, in order not to weight the design of the balcony, it is best to use aerated concrete no more than 10 cm wide, which in the outer part needs to be finished in order to avoid absorption of moisture.