When buying the front door, we first take into account its reliability. And then, over time, sound – and thermal insulation. But a well -insulated door in the winter will protect a lot of heat.
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You can insulate the already purchased front door both from the inside and “outside”. To insulate the door from the inside, you need to carefully remove the inner sheet of the skin. Metal ribs located for reliability should be laid and fixed to the insulation.
The ideal option is polystyrene foam or mineral slabs due to its resistance and durability. The distance between the outer and inner plane of the door should accurately calculate. As a rule, this is 4 or 5 cm. It is not difficult to calculate the thickness, it is enough to measure the thickness of the door leaf and deduct the thickness of the skin on both sides. Do not forget about the size of the door length. If desired, you can replace the internal casing.
To do this, it will be enough to purchase a sheet of fiberboard. It must be adjusted by size, first noting and cutting the places of the door eye and locks. Having adjusted the new casing in size, it must be screwed to the door. A screwdriver and a couple of dozens of self -tapping screws will perfectly cope with this task. As soon as the panel is installed, it should be grinded at the edges with sandpaper.