Expanding the

If you mainly use the balcony as a household, for example, to store things and drying of linen, then in this case it will be enough to install single -chamber double -glazed windows. If you use the balcony as a dwelling, then it is best to purchase two -chamber double -glazed windows, which will be a thickness of at least 32mm. But, when ordering window frames, take care of expanding the profile, which is fixed along the perimeter of the structure, to close the insulation and mounting seams on the outside.