What do I do if only a section of the wall is a parting wall?

If theonly propertiesa section of athe wall varyis alonga parting wall, for instance, if there is a garage behind half the edgewall ofbut anot room,the other half, you can split the wall using the blue handles. This may be necessary if, for instance, one half of the wall has an unheated space behind it (for example a garage), and the other half is external. Simply drag and drop the blue handle to the point where the wall needs to be split. You can then setselect differentwhether propertiesthe forother eachside sectionof this wall is a heated or unheated space. In the example, you would select one half of the wall.wall as unheated space and the other as outside.