For the inhabitants of our country, the issue of insulation of their housing is very acute, if not threateningly. And especially the insulation of apartments, it is usually only about the old apartment buildings, which were built several decades ago.
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It is constantly cold in such houses, for the reason that the heating system is very worn out in them and, moreover, it is simply not effective. To live in such apartments in winter is a real test, since they are always cold in them. The only way out of this situation is the insulation of the apartment. Independent insulation is possible only inside the apartment, since external insulation requires the involvement of special equipment, which is at the disposal of utilities.
The first thing to do as part of measures to warm the apartment is to replace the old windows and the old balcony door. Moreover, you need to change to windows that differ in higher characteristics for thermal protection of the premises. In most cases, PVC windows are used for this. The next stage in the insulation of the apartment should be the replacement of old cast -iron radiators, which have long been outdated. They usually change them to modern aluminum radiators, which are highly efficient.