Considering that the attic is an place under the roof, it can often present infiltration problems, that can be solved using waterproofing systems both indoor and outdoor.
At the same time, it is a place where heat loss is higher than other areas of the building; for this reason it usually needs a proper thermal insulation, that can be made using Diathonite plasters and screeds. Thanks to the low level of thickness required to obtain a good insulation,the internal area (yardage) remains the same, thus without weighting down too much the existing substrate.