Winter Gardens are systemically assembled from individual elements. They can have hinged or swivel windows, a fixed or tilting roof, the vertical walls can be both fixed and sliding. It all depends on the specific project and the customer's wishes.
Very few often winter gardens are already included in the construction project. If this is not the case, they can be added additionally. That's most of the cases. It is important that they form a complete whole with the house, and do not operate improperly or not in a completely different style, like the rest of the house.
Most of the times we get to realize the Winter garden only a few years after we finished the house. For example, this is for financial reasons. Also sometimes, during the killing, we find that a place like a winter garden is missing.