Doors 20/12/2017

Insulated doors – how to choose a reliable protection from the winter cold

In the unpredictable climate of the Khabarovsk heat-insulated door is not a luxury but rather a necessity. This design will prevent heat loss in cold seasons and in summer protects from the penetration of heat. Besides, high quality thermal insulation of the door will protect the house from penetration of extraneous noise.

Insulated doors – how to choose a reliable protection from the winter cold

Blame physics

Why, when it comes to insulated doors, we mean most often a metal door instead of wood? If you dig into memory, you may recall that we were told in physics lessons about the thermal conductivity of metal, unlike wood, has excellent thermal conductivity and to protect from cold or heat, not originally.

This does not mean that wooden doors are not insulated. Just do it much less often, applying exterior insulation, while metal exterior doors insulated inside, as it's a hollow design.

Types of insulation for metal doors

The quality of insulation, as well as other parameters of the entrance door is displayed on its value. Hope that the cheap street door will be warm, not worth it.

Corrugated cardboard

Corrugated cardboard

This is not insulation at all, and its visibility. Paper, of course, keeps you warm. But due to the fact that it is apt to swell from moisture, to burn and to absorb all the smells for insulation it is not necessary. Be warned – careless some Chinese manufacturers use corrugated cardboard in their products.

Mineral wool, mineral wool boards

Mineral wool, mineral wool boards

The most common insulation material because of its cheapness. With mineral wool, there is a drawback – it compresses over time and its insulating properties are reduced.

Partially this problem is solved by adding transverse ribs between the blades design, which naturally affects the value of the input street doors. The best characteristics from the extruded boards made of mineral wool they do not so quickly lose form.

Foam

Foam

Fast and cheap – this is the principle manufacturers that use foam for insulation of doors. Other advantages of this insulation is not. The material is flammable, is ignited by the fire in combustion emits toxic substances. Therefore, such insulation is not recommended in residential areas.

Extruded polystyrene

Extruded polystyrene

This option is more expensive than the previous one, but will last longer, and the insulating qualities of the Styrofoam plates is 1.5 times better than mineral wool. One problem – often under the guise of polystyrene uninformed consumers forced to buy a cheap foam.

Polyurethane foam

Polyurethane foam

With this method of insulation of the insulating layer is not embedded inside the door, and "filled". Liquid polyurethane foam perfectly adheres to the metal and during solidification forms a closed-cell structure with excellent thermal insulation properties. Such insulation is not "slipping" and will not cake.

Requirements for insulation

The "correct" kind of the door is a safe door:

  • The insulation inside them should not burn or melt in order to avoid blocking of the structure during a fire.
  • Fibrous mineral insulation such as "Insulated" should be carefully insulated from the contact area of the castle – inhaling disrupts their performance. For this purpose, the lock is removed in a special "pocket".
  • Important and the outer seal on the door. First, small particles of mineral wool in the air is dangerous for health. And secondly, the ingestion of moisture adversely affects the properties of the insulation.

Thicker door – the thicker the insulation. Pay attention to this parameter. And yet – the more insulation covers of "cold bridges", the better. This can be achieved by applying two or three insulation at the same time.