Owners of their own homes on the ground are faced with one common problem - the entrance freezes Iron door in a private house. To solve it, you just need to spend a little money and a few hours of your time. In other cases, a whole range of measures may be required. But first, it’s worth understanding the reasons for what is happening, after which it will be easier to decide using existing methods fight against freezing.

Why does an iron door freeze in a private house?

The main answer to the question why it freezes steel door in a private house, lies in physical processes. When there is severe frost outside and the heating is on in the room, then the boundary between big difference temperatures the canvas serves. Iron supports heat transfer well. On the one hand, it is affected by cold, which penetrates inside the house, and on the other hand, warm air, which, in contact with the cooled metal, condenses on its surface.

If the negative temperature is very low, then it is even enough to freeze water streaks on the surface of the canvas and create icing. Depending on the following design features products, this effect may be enhanced:

• the sash was not initially insulated or the insulating material shrank;
• small door thickness;
• uninsulated boat;
• poor factory sealing of the vestibule;
• violation of the geometry of the structure, leading to more drafts.

Consequences of a freezing door

Understanding why it freezes Entrance door in a private home, it is worth knowing about the adverse consequences of such a factor. At first, this manifests itself in the form of harmless condensation, which can be wiped off with a rag when there is time. But the regular appearance of moisture and a possible drop in temperature lead to serious problems:

• The metal structure rusts.
• The wooden cladding on the inside swells and crumbles. It is even possible that part or all of the slab may fall off.
• The canvas blows cold, which is unpleasant when the front door is located in the kitchen or large living room.
• The porch is carried out with difficulty.
• Locks work with jamming.

Understanding the degree of harm from this unfavorable phenomenon requires insulating the door in a private house as soon as possible if it freezes. There are several proven methods for this.

How to insulate a door if it freezes

The most common method to solve the problem is to install new insulation material. If the front door was purchased more than 10 years ago, the existing insulation could have settled or disintegrated. To replace it, remove it decorative panel, take out old material and lay a new one. This can be mineral wool or polystyrene foam. The segments are cut to the size of the internal sections located between the stiffeners. To prevent them from moving out, they should be coated with glue.

If a door freezes in a private house, what else should you do? In the following way serves for a tighter installation decorative overlay on the inside and outside. This increases the overall thickness of the web and promotes less heat transfer between the sides. MDF panel 16 mm will be much more effective at preventing freezing than a similar 6 mm element.

For this they purchase wood board, cut strictly to the dimensions of the sash. Its installation is carried out either directly on self-tapping screws to the metal, or through fastening the timber along the internal perimeter. The panel can also be made insertable on guides. But as the thickness of the blade increases, it will be necessary to lengthen the rods from the handle and the night latch, as well as, possibly, the lock cylinder.

When an iron door freezes in a private house, you can still insulate the door. A hole is drilled in the hollow structure through which mineral wool or polyurethane foam. This is how it is filled inner space and heat transfer decreases. Re-glue rubber compressor or add another contour - too effective method to eliminate cracks. The most extreme is to install a second door and create a vestibule.
The company "Dvermet-MSK" sells various doors, which are designed for street installation and don't freeze. We also provide services to increase the thickness of the canvas by installing MDF panels.

How do you know if an iron door is freezing? What to do in this case? There are many methods that can help solve this problem. Freezing is often associated with the mechanisms that are included in its package.

Freezing entrance structure

How to determine that the door leaf in a private house is freezing?

People often begin to notice late that the metal door in their home is freezing. If you notice this on initial stage, then it is easier to solve the problem. Due to the fact that condensation accumulates on the input structure from temperature and humidity changes, it turns out negative impact onto the canvas. Initially, the canvas begins to increase in size, and then a kind of edge appears. If the installation is completed decorative elements, then already at this stage they will become unusable and lose their appearance and aesthetic qualities.

Attention! If the metal sheet freezes, then the locking mechanism will also suffer and it will simply fail. If door leaf made of wood, then due to this problem, fungus and mold begin to develop.

Let's look at the main signs that can help identify initial freezing:

• Jamming of locking mechanisms during the cold season;
• The presence of constant drafts in the room;
• Condensation formed on the door from the inside;
• If the facing material swells, the door may freeze around its entire perimeter.

Attention! If the above prerequisites exist, then do everything possible to prevent the structure from freezing.

What can cause freezing of the entrance structure?

Every home owner is interested in why it freezes door design. The reasons for this may be various. The installation takes on a freezing appearance if it is made of low-quality material.

Let's consider the main reasons for freezing of the entrance structure:

• Sudden temperature changes. That is, if a low temperature prevails outside, and the room is heated, then a temperature mismatch occurs. Condensation settles on the door, which eventually freezes;
• High level of thermal conductivity of iron material. The structure, made of iron, has the ability to quickly cool down and let cold into the room;
• Small thickness of the door leaf. If the iron is thin or the structure does not have internal insulation, such a door allows cold air into the room, which leads to freezing;
• Existing gaps and cracks in the structure. Most often, such a mistake is made during the initial process of installing the door. Cold air enters through these cracks;
• Skew doorway. During prolonged use and improper handling of the structure, deformation occurs, which causes gaps to form.

Changing the insulation of the input installation to prevent freezing

Let's move on to direct action and figure out what to do if the structure freezes. Initially, if metal doors with a seal in a private house freeze, then you need to pay attention to the seal in the design. If the door High Quality, then it is well insulated. If the unit was purchased from ready-made version, then the manufacturer should have thought about this aspect. If the door was made by the owner, then this is his personal mistake.

Initially, replacing the seal begins with the door being removed from its hinges and its leaf being disassembled. Depending on the structure in front of us, the seal can be located inside the solid installation or under the panel.

Soft or loose substrates are used, and there are also dry types. The latter type of seal is used in models that cannot be disassembled. As for other types of doors, sheet-type insulation is used for them. Soft seals are rarely used, as they are of little use. Therefore, nowadays we are accustomed to using foam blocks.

To prevent freezing from happening again, experts recommend using heat-reflecting sheets that are fixed with glue when using a sealant. First, cut the required sheet so that it fits well on the door leaf. The heat reflector and the foam itself are fixed to the door body with glue.

Attention! After final adhesion of the material to the surface, you can return the structure to its place.

Possibility of increasing the thickness of the canvas

If freezing does not stop when the above conditions are met, then do not give up. This is all due to the fact that the door is not thick enough. How to solve such a problem?

The entrance structure must not only have high strength and be visually beautiful. To achieve this factor, various Decoration Materials with the help of which the canvas itself is finished. Often today, the exterior design is made of veneer. It can provide the front door with additional sound and thermal insulation. If freezing occurs, the veneer suffers first. Due to this, the entrance door should be finished with high quality material.

Attention! If layer interior decoration will be thick, then this can be a kind of guarantee against freezing.

Sealing existing joints in the installation

What to do if freezing of the entrance structure occurs along the perimeter of the canvas? The most simple solution will - sealing existing joints. A seal is installed that prevents the passage of drafts and cold air.

Often, for such work, a simple rubber-based seal is used. You can also use a foam rubber seal. Isolon is considered the most modern sealant. You can find it on the construction market; in appearance it resembles foam rubber, but its quality properties are much higher.

Installation of a second entrance door

To prevent doors from freezing, owners of apartments and private houses resort to installing a second entrance door. This method not only helps protect the room from cold and condensation, but will also provide additional protection against burglary.

Before installing such a structure, decide whether there is enough space in the corridor for a second door? To ensure that the installations do not interfere with each other, installation is carried out so that the panels open in different directions.

Currently, not only those who live in a private house, but also in an apartment may face the problem of door leaf freezing. Which insulation method to choose should be decided solely by the owner of the premises. For better effect treat the surface with anti-fungal agent.

You can learn more about how to install the second door from our training video.

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Entrance doors to a private house: nuances of choice

When choosing a door for a private home, owners will have to solve the problem of the optimal balance between price, reliability and thermal insulation properties. There are many options, each of them has pros and cons. In this article we will look at the main types of entrance doors in terms of the listed requirements and help you determine the best one, as well as tell you what to look for when choosing.

What should the front door to a private house be like: basic requirements

Good entrance doors meet two main requirements:

• provide reliable protection from outside intrusion;
• do not allow cold air to penetrate from the street into the room.

These qualities depend, firstly, on the properties of the material from which the door is made, and secondly, on the design features, in particular on the presence of insulation.

Entrance doors are most often made of metal reinforced with PVC profiles, natural wood. Let's look at the features of each type of material.

• Wooden entrance doors for a private house little popular, despite their aesthetic merits. Attractive appearance is perhaps the only advantage of wood. Naturalness and environmental friendliness, which are emphasized in advertising, are dubious advantages: in order for the product to last a long time, the array is processed chemical compounds. Under the influence of moisture wooden door swells and becomes deformed. In addition, it is not burglar-resistant enough and is not fireproof.
• Metal-plastic entrance doors for the house made of PVC profile, reinforced metal frame. They have many advantages: good heat and sound insulating properties, the ability to withstand temperature changes, moisture resistance, fire safety, affordable price. At the same time, doors made of metal-plastic are not without their drawbacks. They are less durable than metal ones, they are afraid mechanical damage. It will not be difficult for an attacker to break into the door, even if the door is equipped with anti-burglary locks. From an aesthetic point of view metal-plastic doors much inferior to wooden and metal ones.
• Metal entrance doors- the most popular option. This is primarily due to their high strength, reliability and durability. Steel is indifferent to high and low temperatures, exposure to aggressive environments, a special external coating provides protection against corrosion. If you equip a metal door with an anti-burglary system, the house will turn into impregnable fortress. A modern capabilities finishes allow you to implement any design ideas. For example, thanks to cladding with solid wood panels, a metal door will become indistinguishable from a wooden one.

But this option also has a weak point: thermal insulation. To prevent the metal door from freezing in winter and trapping cold air, manufacturers have developed several constructive solutions. They will be discussed further.

Entrance metal doors to a private house are insulated different ways. Let's talk about the most popular ones.

• Tambour device. As outer door they put a metal one - it does the job protective function. In order to create thermal insulation, a second door is installed, which can also be made of metal, wood or metal-plastic. A cold vestibule helps eliminate the cause of freezing - the temperature difference between inside and outside. But such a solution is labor-intensive and not always feasible, especially if the house has already been built. In addition, the vestibule takes up useful space.
• Installation of an electrically heated door. Along the perimeter of the canvas and inside the box, as well as along the contour of the locks, they lay electrical cable. The heating system protects the metal door from the formation of frost and ice even in severe frosts, and condensation does not appear on it in spring and autumn. The only, but significant, disadvantage of this option is the increase in energy costs. And if there are power outages in winter, the door will instantly freeze.
• Installation of an entrance door with a thermal break. A metal door to the street always has standard insulation. But it cannot cope with severe frosts, which are not uncommon for middle zone and northern regions of Russia. Manufacturers found a solution: they created doors with a multi-layer thermal insulation cake. It performs the same function as an air cushion in a cold vestibule: it levels the temperature difference between inside and outside.

Reference
Thermal rupture is a physical phenomenon that occurs at the boundary of materials with different thermal conductivities. In the construction of doors, PVC, polystyrene foam, mineral wool, and foil-clad isolon are usually used. These materials serve as a barrier to cold air and do not allow it to penetrate into the room. Thanks to the thermal break, the inner surface of the door retains heat, even if it is -25°C outside.

Entrance metal doors with thermal break are compact and easy to install. They successfully solve the same problem as an unheated vestibule, but unlike it they save space. The only drawback of such doors is their higher cost compared to the traditional option.

What to look for when choosing an insulated entrance door

As can be seen, a design with a thermal break can be considered the best option entrance door for country house. This popular solution is in the collections of many manufacturers, but not all models are able to meet the requirements of the owners. Reliability, thermal insulation properties and other operational characteristics of a door depend on its design features, and they should be taken into account when choosing.

Steel thickness

The door leaf is made of steel sheets of different thicknesses. On the one hand, the use is subtle sheet metal reduces the cost of the design, on the other hand, reduces its reliability. A door made of steel less than 1.2 mm thick will not protect against intruders: it can be broken into without the use of sophisticated tools. To completely protect your home from uninvited guests, choose sheet metal no thinner than 1.5 mm.

The same goes for door frame: the thicker the metal, the higher the reliability. IN best models it is made of a steel profile with a thickness of at least 3–5 mm.

Thermal insulation material

It is its properties that provide the thermal break effect. Therefore, how well the door will retain heat depends on the material. The more thermally insulating layers the cake contains, the better it smoothes out temperature changes. High-quality doors with a thermal break have 4–6 inserts (for example, twice alternating foil-coated isolon and polystyrene foam). The total thickness of the thermal insulation cake is at least 4 cm.

• Expanded polystyrene It is especially often used in the design of insulated street entrance doors. This is a lightweight, durable, non-flammable material with low thermal conductivity, and can also withstand any temperature changes. When making entrance street doors with a thermal break, at least two layers of polystyrene foam are usually used.
• Izolon(foamed polyethylene) coated with aluminum foil is also often present in the design of insulated doors. It has excellent thermal insulation properties, is lightweight, elastic, harmless to environment. The material is laid in two layers, with polystyrene foam or other insulation placed between them. The foil creates the effect of a thermos, reliably retaining heat inside.
• Mineral wool thermal conductivity is comparable to expanded polystyrene. It is environmentally friendly and perfectly insulates noise.
• Glass wool sometimes doors are included in the thermal insulation pie. The advantage of the material is low cost. However, it is better to avoid this option: in hot weather, glass wool heats up and releases toxic substances.
• Cork sheet- material with excellent operational properties. It is natural, safe, durable, provides good heat and sound insulation, and is not afraid of temperature changes. But despite all the advantages, this is an extremely expensive material.

Stiffening rib

Stiffening ribs increase the resistance of the door leaf different types loads They are horizontal and vertical. The former provide resistance to pressing, the latter do not allow the upper or lower edge of the canvas to be bent. The most reliable doors are equipped with a combined vertical-horizontal system of stiffeners.

Reinforced hinges

Reinforced hinges are required to hold a heavy metal door. They also provide additional anti-burglary protection. Hidden cylinder hinges have the best properties. They support the heavy weight of the door and prevent it from sagging. Hidden hinges almost impossible to knock out or cut. Their disadvantage is that they do not allow the door to be opened more than 90°.

Lock

A door's resistance to burglary is half dependent on the properties of the locking mechanism. There must be at least two locks and preferably a lever type (the cylindrical mechanism is not so reliable, its elements are prone to freezing). It is worth paying attention to the burglary resistance class: for a metal entrance door to a house, choose III or IV.

Presence of anti-removal pins

To increase reliability, iron entrance doors for private houses are equipped with anti-removal pins. They are fixed in the end part of the canvas and in closed position fit into the openings of the box. Thanks to anti-removal pins, an attacker will not be able to remove the door, even if he manages to pick the lock or cut off the hinges.

Exterior finishing

Exterior finishing should not only give the door an aesthetic appearance, but also protect the metal from corrosion and withstand exposure to precipitation, sunlight, heat and cold. These properties are optimally combined with hammer painting - the most common type of coating.

Doors finished with natural wood are very beautiful, but not affordable for every owner. Materials that imitate solid wood (chipboard and the like) are not able to withstand external influences and quickly become unusable.

Manufacturer

Insulated doors using thermal break technology are produced by many Russian manufacturers. Several brands are particularly popular among customers. Among them are “Nord”, Torex Snegir, “Argus”, “Guardian”, Termo, “Bravo” (Optim Termo series). When purchasing products from any of these brands, you can rest assured of quality.

Cost of an entrance door with a thermal break

Entrance doors with thermal break for a country house presented in three price categories - economy, business and premium. The average cost of products ranges from 20,000–35,000 rubles. The price is influenced by the following factors:

• Steel thickness. Economy class doors are made of metal sheets with a thickness of 1.2–2 mm, premium ones - up to 5 mm.
• Number of layers of heat-insulating material. IN inexpensive doors 3 layers are used, in premium products - 6 or more.
• Filler type. Expanded polystyrene, mineral wool, isolon are standard materials. In models of the upper price category, cork filler is also often used.
• Finishing. In doors of the economy and business categories, MDF with PVC finishing, veneer, eco-veneer, laminated. Premium class products are lined with natural solid wood from the inside. Inexpensive options external coverings are presented mainly artificial leather. More prestigious models are painted with hammer paint in two layers, decorated with patterns, steel plates, and forged elements.
• Hardware manufacturer. In the manufacture of thermal doors, locks, handles and hinges of domestic and foreign production are used. Russian fittings are inexpensive, although the quality is sometimes not inferior to Italian ones.
• Availability of additional anti-burglary elements. A second lock, anti-removal pins, armored linings and other means of enhancing protection increase the cost of the door.
• Purchase method. Russian manufacturers of thermal doors sell their products through company stores, dealer networks, and also through intermediaries. By purchasing directly, you can save up to 40% on average.

Among all types of entrance doors for a private home, metal doors with a thermal break seem to be optimal in terms of warmth and reliability. Modern models have different variants external design, equipped with anti-burglary protection systems. The cost of an insulated door depends on a number of design features.

Where can I buy an entrance door, including one with a thermal break?

“You can buy an entrance door at company store, in a construction hypermarket and even via the Internet,- says a representative of the Bravo factory. - But it’s more profitable to purchase from manufacturers, especially if you need a wholesale batch: bypassing intermediaries, you can save up to 40%. In addition, manufacturers know everything about their products. At the factory they will tell you about the materials, the installation features, and the rules for operating the doors, show you certificates, and introduce you to the full range.

For example, the catalog of the Bravo factory contains almost 400 door models, including entrance doors with a thermal break. Products manufactured under the Optim Thermo brand have 6 (!) layers of thermal insulation, 3 sealing circuits, and are designed for temperature Range from -45 to 40°C. The doors are equipped with burglary-resistant locks with armored linings, anti-removal pins, ergonomic handles and three groups of wear-resistant

Editorial opinion

When choosing an entrance door to a private house with a thermal break, do not forget that the fittings should have similar properties. Locks and handles are the weak points of the structure: they are less protected from freezing than other elements. High-quality insulated doors are equipped with fittings with thermal protection: a layer of thermal insulation is provided at the junction of the outer and inner handles, and the locks are closed with curtains.

The formation of ice or frost around the frame on the inside of the doors is a negative factor that cools the room and reduces the service life of the product. Ice deposits can even prevent the sash from closing completely, worsening the current situation. To understand what to do if the front door freezes, it is worth understanding the reasons for what is happening and comparing them with a specific situation. This will help determine which of the common methods will be effective in in this case.

Why can the front door of a private house freeze?

Freezing of the door is extremely undesirable, because it leads to swelling of the wooden linings on the room side, swelling of the powder coating, deformation of the ledge, jamming of the locks and the appearance of fungus on the slopes. The reasons why a metal door freezes in a private house may lie in the following:

• Deformation of the shape of the canvas or the geometry of the opening due to long-term use.
• Cracks in the frame or sash, allowing free penetration of cold air.
• A large temperature difference between the sides of the door or a sharp change in weather conditions (it was warm and suddenly severely frosty).
• The seal contour has worn out.
• Shrinkage of the filler has occurred and heat transfer occurs much faster through the metal sheets and the empty cavity.
• Insufficient thickness of doors with thin iron and cladding.
• Uninsulated box or poorly sealed installation gap.

What to do if the door freezes

If frost deposits or outright ice formations begin to appear regularly, then urgent measures are necessary to prevent damage to the structure. After analyzing the reasons described above, you need to understand which is most likely in this case. Most often, it is an ineffective or sagging filler that has ceased to fulfill its role. You can insulate a metal door in a private house if it freezes using mineral wool slabs. This can be done provided that the canvas is collapsible.

In this case, a number of actions are performed:

1. The canvas is removed from the hinges, having first unscrewed the handles and the peephole.
2. Most often, access to the internal cavity is gained by dismantling the wooden lining. It can be fixed with self-tapping screws around the perimeter or driven into special grooves at the top and bottom.
3. After removing the panel, you need to remove the old insulation.
4. To install a new one, you need to cut segments identical from basalt slabs internal dimensions sashes, and place them between the stiffening ribs. So that they do not move down, reverse side treated with liquid nails.
5. Assembly is carried out in reverse order.

If the insulation inside is of high quality, then the reason may lie in the insufficient thickness of the fabric. Since nothing can be added inside, the sash is extended from the outside by installing a wooden overlay (in the case of metal sheets on both sides). To do this, order an MDF card with end finishing, which must be the same size as the canvas. Fixation is carried out using glue and screws. Such panels can be added both from indoor and outdoor sides.

If, despite the steps described above, the iron door in a private house still freezes, or there is initially a good filler and there are wooden overlays, then the reason lies in poor insulation of the box. In this case, you need to drill several holes on the end of the box and fill vertical racks and a lintel with mineral wool fibers. This is painstaking work that requires tearing the insulation into thin pieces. An alternative is to fill with foam at intervals so that the first portions have time to harden a little.

For any action, it would not be superfluous to replace sealing gum, located on the contour of the door and frame. It is attached on a self-adhesive layer. This will reduce the passage of cooling air to the room side of the porch. If the installers did not properly seal the gap in the opening, then they will need to break the slopes, dig out the old foam, fill it with new foam, and re-plaster the area. Installing additional panels will increase the insulation properties.

Extreme measures when the door freezes

If the methods described above did not help, and the front door in a private house still freezes, then you will need to install a second door, which will create additional insulation at the entrance, which will reduce heat loss in the house. This design will also become a barrier for sharp drop temperatures between the heated room and the street door. The resulting vestibule will have a temperature lower than in the room, which will eliminate drips on the box and their freezing when it gets cold.

The second option to combat the problem is to install a door with a thermal break, inside of which there are two independent layers of insulation, separated by foil. All metal parts in the structure are assembled with a layer of cork backing to reduce heat transfer between steel parts. The box in this product is also initially insulated and has a cork backing on hinges.

The Reliable Doors company offers to purchase reliable doors for a private home, which are well insulated from the inside and have thick wooden linings, several insulation contours, and also filled mineral wool boxes. Products also available with thermal break.

Read in 10 minutes.

In private houses and cottages in winter you can feel the frost blowing from the front door. Its structure freezes, allowing cold to penetrate into the house and releasing heat to the street. It turns out that while you pay for heating the street, your family suffers from the cold in the house. Thermal break allows you to cope with this task.

Operating conditions of the street door

The entrance street door is subject to temperature changes. In winter, the house is much warmer than outside. Due to temperature differences, condensation may form on the inner surface of the door.

In physics, this phenomenon is called the “dew point”.

Dew point is the temperature to which the air must cool for steam to reach a state of saturation and begin to condense into dew.

In severe Russian frost, the temperature difference between inside and outside the house increases significantly. Because of this, the condensate freezes almost instantly, forming ice. Fittings freeze: locks, door handle. Rust forms on the metal, which shortens the life of the door.

You can avoid these problems by installing an entrance door with a thermal break.

What is thermal break?

This is a layer of material with low thermal conductivity, separating the external and inside structures so that one does not transfer its temperature to the other.

How does thermal break work?

The operating principle can be explained as “two doors in one”, since the two doors are connected to each other through a heat-insulating material.

As a material with low thermal conductivity, for example, cork or MDF board is installed in the door.

Thermal insulating material "Cork"

Sounds complicated? Let's use an analogy. Imagine boiling pasta and dropping a spoon into the pan to stir. The spoon is hot, it is impossible to hold it. What are we doing? Take an oven mitt and calmly stir the pasta. Tack is a thermal break.

In doors it works on the same principle. Well, except that the design is more complicated.

Thermal break in the canvas and box

The thermal break can be placed both in the door leaf itself and in the door frame.

The thermal break in the box is a layer of insulating material that is located between the outer and internal part boxes

To operate the door when low temperatures choose a model with a thermal break both in the box and in the canvas.

Compliance with GOST

Now let's turn not only to physics, but also to legislative norms. All entrance doors must comply with GOST 31173. The main indicator when checking the compliance of a door with a street door in this GOST is heat transfer resistance.

In accordance with GOST 31173-2003, its indicator for steel door blocks is set at a level of not less than 0.4 m2 °C/W.

In cold climates, where the average winter temperature is below -30°C, this indicator is recommended 2.1 m2 °C/W.

Quality door with enhanced thermal insulation and thermal break will ensure the fulfillment of this indicator.

Thermal break - replacement of vestibule

Traditional solution problems with door freezing - arrangement of an unheated vestibule area.

The vestibule is a room at the entrance to the house, which is the same thermal break between the cold street and warm home. Two entrance doors are installed in the vestibule - at the exit to the street and at the entrance to the house, which prevents cold and warm air collide sharply.

However, there are disadvantages in arranging the vestibule area:

• you need to buy not one, but two doors for installation - additional costs
• the door at the border with the street should open inside the vestibule, which means a lot of space is needed
• Not every house can have a vestibule.

Entrance doors with thermal break - optimal solution, if you do not plan or there is no opportunity to equip a vestibule area. In any case, installing such a door will cost less than buying two doors and building a vestibule.

Outdoor entrance doors with thermal break

Street doors must also have multi-level thermal protection: multi-layer insulation, several sealing contours, and the absence of “cold bridges”.

The SNEGIR series was created taking into account the climate, design wishes and planned purchase budget.

So, thermal break for street door necessary if there is no equipped vestibule area. It separates the door leaf and frame into two separate parts using a material with low thermal conductivity. So you get “two doors in one”. However, thermal break is not the only factor that influences the choice of a street entrance door.