The market presents different options for such products. Terrace frame is distinguished by simplicity and low cost. It is made without a double -glazed window, from a terrace timber. Wooden windows for giving this type can only be planned if you live in this room only in the warm season, t. To. The design has a number of minuses. First of all, these are low thermal insulation properties (it holds heat poorly), primitive fittings, defects in a wooden array.