Warming and sound insulation of balconies should be conducted from all sides, including walls, floor and ceiling. Naturally, it is necessary to choose the right glazing, which should also have these properties, and not only protect from the weather. The most warm and quiet is considered to be a balcony with glazed frames that have double glazing. Sometimes a warm floor is made on the balcony, which will help to turn the balcony into a full room. But even without this, good insulation results can be achieved.
Warming of the balcony can be made both from the inside and from the outside. It is simpler to carry out internal warming, however just in this case the useful space decreases. External warming and space will be preserved, and the best indoor climate will provide without the risk of condensation, and the appearance of the balcony will transform, but the installation work here is more complicated and more expensive.
As a heater and sound insulation, you can use a variety of modern materials. So mineral wool, fiberboard plates, foam plastic, extruded polystyrene, basalt cope well with cold and sounds. These materials are best used. There are also materials such as Rockwool, Isocum, Izolon, Isotope, Isover, Urs, Holofiber, Penofol, and the like. In addition to the volume, the weight of the resulting structure must also be taken into account.
There are many options, in each case the best one is selected depending on the specific conditions. For example, 3-5 cm of EPPS and a screed are recommended for a floor, then a floor covering on a substrate. The walls can also be XPS or dense basalt, vapor barrier and sew with wooden clapboard or plasterboard. The ceiling is about the same, but with additional waterproofing. Along the perimeter, you can use polyurethane foam sandwich panels or glass wool and moisture resistant gypsum board.