Interesting facts about front doors. Interesting facts about the entrance doors (5 photos) Photos of the entrance doors to the apartment
The door is the hallmark of the home.
We invite you to get acquainted with interesting facts about this familiar part of every home.
1. One of the first in the history of mankind
It is believed that the Swiss maple doors were the very first in the history of mankind. And although they are already twenty-four centuries old, they can be used even now - they are perfectly preserved (perhaps the reason for this is the mild climate and good ecology of Switzerland). Doors were installed in lakeside houses. They are very dense, well protected houses from cold and wind. 
2. Portal of the Baptistery of St. John the Baptist
Westminster Abbey (UK) is another address of the magnificent ancient door. The door is oak and is still in operation. This door is twenty centuries old. 
3. Doors are not only made of wood
Most of the doors were made of wood, but archaeologists have also found stone and iron doors. As experts say, nothing has changed since then: doors are still made of wood and iron. 
4. Open the door and escape
The great Chinese commander Zhuge Liang saved the city from enemies by simply opening the gates. The invaders did not dare to enter, as they were sure that since people are not afraid to close their doors, the city is full of soldiers. But according to legend, Zhuge Liang was the only warrior in the city. 
The famous French philosopher Michel Montaigne did the same. At a time when the Catholic wars were raging in France, he was able to save his house from thieves by simply opening the doors of his home. The robbers thought that since the doors were open, it meant that the house had been robbed and the owners had nothing to guard.
5. Why are there many colored doors in Ireland
Bright Irish doors are part of the local flavor and memory of the historical event. After the death of Queen Victoria, a decree was issued that all doors as a sign of mourning should be painted black. Freedom-loving Irishmen painted the doors in all possible colors except black in protest. 
Several door records
1. The heaviest door - weighing 321.4 tons - is located in America at the California National Laboratory. 
6. The most unusual door
2. The most unusual door is the Tanaka door, which consists of vertical slats. They have built-in touch sensors. When a person approaches the door, the sensors detect the contours of the body and the slats are pulled back. 
3. The tallest doors cover NASA's Kennedy Space Center assembly hangar. There are four of them, each with a height of 139 meters. For comparison, the height of the Statue of Liberty in New York is 93 meters.
5 most unusual doors
1. "Sports" door.A door with a built-in ping pong table called the Ping Pong Door. I wanted to play table tennis - you just turn the door horizontally, put it on the latch and play as much as you want. By the way, you can make such a door yourself if you use a saw to cut out the central part of the door and install hinges with which the door will turn and take a horizontal position.
2. Door for writing.
You can turn an ordinary kitchen door, for example, into a slate board. Notes under a magnet on the refrigerator are already the last century, neither style, nor comfort, but on the slate board there will always be a small list of products for a dish written down by the way. By the way, instead of a slate board, you can use rough dark glass. Decorative overlays on doors are in fashion now, so there can be a great variety of options.
3. Solar door light + air.
Inside the door there is a built-in movable plate on which the holes are located. There are holes in the door body too. They may or may not match the holes in the inner plate. If you are short of air and light, you can use a simple latch to move the plate inside the perforated door.
4. Door-stairs.
This door is suitable for those who love secret passages, who work with valuables at home and do not want to take risks. If you lift this staircase up, then a passage will open into the room below, for example, in the basement. However, if there is a problem with the lifting mechanism and
Doors are of great importance in a person's life, we can say that this is the very part of the house with which a person comes into contact most often. It means, first of all, active contact. Of course, speaking of doors, you must immediately separate the interior and exterior doors on the sides, since they perform slightly different functions, which has been said more than once on the pages of our website bloomhuff.com.
What's in this section
The section "Doors and everything about them" contains a large number of articles that are devoted to door designs. Our site is no longer young, so we can boast of a serious assortment of articles, including an assortment that relates specifically to doors. Without much difficulty, by the way, we have a search for this, you can find the information you are interested in on any type of doors, both interior and entrance. We talk a lot and thoroughly about steel and wooden entrance doors, as well as about door structures that are not used so often, for example, about plastic doors and doors made of aluminum profiles. Interior doors are presented in our section no less than entrance doors. Anyone can find information on wooden, plastic and other interior doors that are only used in the world. When writing articles, we take into account the fact that modern doors, moreover, this applies to doors of all types, have a rather serious cost, and therefore their purchase is a very responsible matter. Every time, pointing out the positive or negative aspects of a particular type of door, we approach this as responsibly checking the information, including in practice. And if we talk about the installation, as well as the repair of doors, then all the articles that relate to these topics are written by our specialists who have installed not a single hundred door structures with their own hands.The need to protect your home has existed since time immemorial. Historically, people have seen something so solid and durable in iron that they can defend against. Throughout the history of mankind, the technology of manufacturing door structures, as well as the materials from which they were made, have changed many times. It will be about such ordinary metal entrance doors, but as it turned out with a huge number of interesting facts and non-standard history.
In 2010, in Zurich (Switzerland), archaeologists discovered an entrance door, which is about 5 thousand years old. Thus, this find is the same age as the British Stonehenge. According to scientists, the door structure has survived to this day due to the fact that at that time harsh climatic conditions forced people to build their homes around lakes, and this required strong timber.
The oldest wooden door still in service is at Westminster Abbey (UK). It has been reliably established that it was made of oak, felled in the 11th century. Thus, the approximate age of the door structure is about 10 centuries.
All over the world, metal entrance doors are classified into 13 security classes. And if the doors of 6-7 security class are found everywhere in bank vaults, then the door steel system of the 13th security class is only in Fort Knox (USA). Fort Knox is a repository of US gold reserves. The steel product, which reliably guards the gold reserves of the United States of America, weighs 22 tons and is 1 meter thick. It is made of seven layers of steel, and it was cooked using a secret technology.
The world's tallest door is located in a spacecraft workshop in Florida (USA). It has a height of 140 meters, and 45 minutes is the approximate time of its closing / opening.
The heaviest door system is considered to be a metal structure installed in the Lawrence Laboratory in California. Its weight is about 320 tons, and its thickness is almost 2.5 meters. And although it seems that with such a mass, only remote opening / closing is possible, but thanks to the special door hinges, the system also opens manually.
The fastest-closing door products are installed in laboratories that deal with explosives. In case of danger, they close in 0.3 seconds. Such a high speed is provided by nitrogen compressed to 1000 atmospheres.
The automatic door "Tanaka" opens automatically when someone approaches it, and it is precisely the passage of exactly the shape and size that opens so that a particular person can enter. Each of the horizontal sliding bars that make up the door is equipped with sensors that calculate the shape of the person wishing to pass and repeat it.
The most beautiful is considered to be the bronze gate of the Baptistery of St. John the Baptist in Florence, Italy. The entrances were so skillfully finished that the great Michelangelo called them "The Gates of Paradise". They were made by the famous at that time architects Andrea Pisano and Ghiberti by order of the Guild of Merchants in 1425.
One of the most eerie doors in the world can be considered the door of the Cathedral of St. Nicholas, this cathedral is located in Slovenia. In fact, all the doors of this cathedral are a little creepy, but this one is especially. She is quite young, this door appeared in 1996 in honor of the visit to the cathedral of Pope John Paul II. According to the authors' design idea, the door should represent the history of the diocese.
Supposedly the most secure residential door on the planet is made in Colombia. This monster has the following characteristics: bulletproof, fireproof, explosion-proof, protection against metal cutters, 10 locks (pins are almost 2 cm wide), a biometric lock system (first a fingerprint is checked, then a blood test is taken to check that the finger belongs to a living person) , camera integration over IP (if you wish, a photo of the visitor will be sent to you by e-mail as soon as he clicks the call).
In Ancient Russia, the doors were specially made low so that guests would welcome the hosts who sheltered them.
The well-known rule of behavior when a man lets a woman through an open door has its origins in ancient times. Sadly, but true: when people were still living in caves, a man thus checked the safety of his home, and suddenly the mammoth accidentally ran in or an enemy tribe dropped in. Here the weaker sex had to check the presence of danger on itself.
Philadelphia inventor Theophilus Van Kannel received the first U.S. patent for a revolving door in 1888. In New York City, government buildings are legally required to rotate doors at 15 revolutions per minute.
Finding a secure front door can be challenging, as it often involves dealing with a price versus quality dilemma. The safety of not only property, but also the owners of the premises depends on the correct choice of design.
First, you need to decide on the material of the door. In the modern world, wood will not provide adequate protection, so there is only one choice - metal. Finishing is a matter of taste, but do not forget that the door will become a kind of "visiting card" of the home. Examine the photos of the entrance doors so as not to miscalculate with the appearance.
Secondly, a good door will provide sound and heat insulation, which is especially important in northern latitudes.
Entrance door construction
When selecting safety characteristics, one can be guided by the principle “the more, the better”, but this can lead to an unjustified increase in the price and weight of the structure. Also pay attention to the ratings of manufacturers of entrance doors in your price segment.
The door frame is made in one piece, including a threshold, or U-shaped without it. The sillless design provides a lower level of protection and is used in economy class doors.
The metal part made of cold-rolled steel is more expensive than hot-rolled steel, but of better quality: the structure is durable, lightweight and strong.
A steel corner door is the cheapest option, but it is easily deformed. In a private house or entrance without an intercom, this option is the last thing worth looking at.
A square profile with stiffeners and at least 2 mm steel sheet will provide higher strength. This design can be installed in a private house.
The door leaf must be made of steel sheet with a thickness of more than 1.8 mm. Buying a door that is too thin is not in your interests, no matter how tempting the price may seem: opening it is as easy as shelling pears.
A high-quality door necessarily has vertical and horizontal stiffeners. Insulation is laid between them. The more ribs, the better, but this will affect the weight of the structure. They must be evenly distributed to ensure proper reliability.
Hinges
The choice is between overhead hinges mounted on the outside and internal hinges installed inside the frame.
The first type must necessarily provide for anti-removable crossbars, which prevent the door from being removed even when the hinges are cut off.
Hidden hinges cannot be cut or unscrewed and cannot be seen from the outside. Unfortunately, there is a chance of a wedge, and then even the landlord will not be able to get home.
Hinges for heavy, massive doors should have support bearings to facilitate opening and closing.
Locks
The use of two locks of different designs at once: lever and cylinder locks will significantly increase the reliability. One of the advantages of this approach is that in case of breakage of one lock, you can temporarily use the other. If possible, supply an individually made lock.
When installing the front door, make sure that the crab-type lever lock is correctly installed - otherwise it may jam.
The cylinder lock should be additionally reinforced with an armored pad. If the design implies a heck from the inside, this is another layer of protection.
An important point: the locks should not be closer than 25 cm to each other in order to minimize the chances of simultaneous cutting with a grinder.
Seals
They provide heat and sound insulation, as well as protection from odors. Doors equipped with seals adhere more tightly to the vestibule and close more quietly.
Rubber is not without reason considered the best material: it is durable, hardy, withstands various influences. If necessary, the seal can be easily replaced with another one. Fixation takes place on an adhesive strip.
Some magnetic seals attract too much, which can make it difficult to open the door.
In an apartment building, one layer is enough, in a private one, at least two are needed to protect from the cold.
Heaters
Typically, foam, polyurethane foam and mineral wool are used. It should fit snugly against the ribs and frame. The cavities of the metal profiles are also insulated.
In a private house, polyurethane foam will cope better with the role of insulation, in an apartment - basalt wool. Styrofoam is usually used in conjunction with polyurethane foam, which is used to fill the resulting gaps.
Price segment
Of course, not everyone can afford an option that fully meets all the requirements. We offer you to figure out how to choose an entrance door in different price categories.
Economy
Low-end models, as a rule, are made in China, but also come from a domestic manufacturer. The price varies between 7-10 thousand rubles.
The design provides for one sheet of steel up to 1 mm thick with a door leaf thickness of 6-7 cm. Stiffeners do not include additional reinforcements. Finishes are made of MDF or plywood. They can provide an attractive appearance, but the security of such a door is rather questionable.
Average
The price can be 10-20 thousand rubles. Together with the cost, the quality of the construction also increases. The door of the middle segment has a better protective function.
Includes 2 sheets of steel more than a millimeter thick, the canvas itself is more than 8 cm. There are additional seals and thermal insulation. Locks are equipped with anti-tampering protection. You can choose a finish from a much larger number of options.
Upper
The next price segment includes doors costing from 20 to 30 thousand. They provide maximum safety and reliability. They can be called the best front doors to an apartment.
Door locks receive enhanced protection, there are anti-removable hinges and additional stiffeners. With a blade thickness of 8-10 cm, steel sheets up to 2 mm are used. Good noise and heat insulation is sure to be present.
Elite
This category includes doors over 30,000 and custom-made. Their main difference from the doors of the upper segment is a better finish made of natural wood or stone, the presence of forging.
This also includes armored doors, the thickness of steel in which can reach 5 mm. They will withstand even a strong blow.
Some models have the ability to operate using the remote control.
Photos of the entrance doors to the apartment
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