Problems Associated With Flat Roofs and Roofs Terraces
You will often inherit a flat roof and roof terraces when purchasing a property, as they are a common design feature here in Spain.
Upper terraces are often structurally sound, it is unusual for them to be built as an afterthought. Although I have come across instances where this is the case, where they are separating from the main building. However, flat roof and terraces can still be a cause for concern and costly to put the faults right.
The main problem associated with flat roofs and terraces is water ingress. The main structure of Spanish properties is reinforced concrete. The builder will often skip the very important phase of preparation, which involves sealing the concrete from water penetration, simply laying the tiles onto the concrete.