The key to quiet and smooth operation of sliding interior doors is high-quality fittings. Roller structures have a complex structure and require the use of an expanded set of elements.
The set includes:
- guides. As a rule, modern door systems are hinged. Large and heavy sliding panels often equipped with a floor rail. Guides are made of steel and aluminum;
- rollers equipped with bearings. Elements often have a rubberized shell for soft movement;
- components for rotary models. The functioning of these original products provides a rotating mechanism;
- pencil cases. Metal structures are built into the wall, leaving only the door visible;
- special handles.
The main criterion is the weight of the sashes. For heavy sliding doors made of solid wood or glass, it is better to purchase reinforced rollers. Also pay attention to the following nuances:
- the rail should be twice as long as the interior panel;
- the floor track should ideally have a seal that prevents clogging;
- aluminum profile is quieter than steel;
- the number of accessories is selected based on the size and number of sections.
You can evaluate the entire range in person in the showroom in Moscow.
***If desired, enlarge the photo doors on rails click on it.
Structure of doors on rails
How does the mechanism of interior sliding doors on rails and rollers work?
The operating principle of the sliding mechanism door designs It’s quite simple, and the canvas itself moves absolutely silently. The video below clearly demonstrates what such a door consists of, how it works and how it is installed.
Advantages and disadvantages of doors on guide rails
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Where are doors on rails most often used?
Most often, these designs are used in houses with narrow corridors, because they do not require additional space. They are also desirable in houses whose owners follow the current trends of our time.
They are also used in shopping centers, entertainment facilities, oriental restaurants, commercial buildings.
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What sizes of door leaves are there?
When taking measurements to order a future sliding structure, it is necessary to take into account that the size of the door leaf should be 10 cm larger than the dimensions of the opening where it will be installed. This will ensure there are no gaps and create maximum effect privacy.
The standard sizes available for serial sliding doors on rails and rollers manufactured in Russia are 600 mm, 700 mm, 800 mm, 900 mm.
If the opening where the structure is supposed to be installed is larger, you can use two or more canvases instead of one - depending on whether the customer simply wants to block the opening or delimit the room into several separate spaces. Classic option is a product consisting of one or two canvases.
Interior sliding doors are a great opportunity to update your interior. Combining functionality and modern design, such doors will become an unusual element of your home. However, in order to choose not only beautiful, but also a secure door, especially close attention should be paid to the mechanism.
Interior sliding wooden doors.
Sliding doors consist of several parts. Most often this is the canvas, fastening system and mechanism. All necessary details are sold as a set and are included in the price of the door. However, in case of any breakdown, without having an idea of how the door works, you will have to contact specialists, and this is a waste of money.
Let’s try to figure out on our own how the mechanism works and whether it’s possible to assemble interior sliding doors yourself. Instructions and photos that can be easily found on the Internet will help us with this.
Mechanism basis
The mechanism for sliding interior doors is quite simple and consists of three main parts:
- profile guides (rails);
- roller device;
- bracket mounting;
- stoppers;
- screws.
Profile guides are made of metal - often aluminum, sometimes steel. There are doors with one rail and with two, and with a single guide it is attached only from above. The length of the rail should be twice as long as the doorway.
Sliding mechanism.
The sliding door is equipped with two rails - bottom and top. The double-rail design has its advantages and disadvantages:
- The mechanism with two rails is more stable.
- As a result of the main load on the lower component, the mechanism with two rails can withstand heavy loads and have a longer service life (especially with a heavy door leaf).
- The best indicators of sound and noise insulation.
- The bottom rail creates a threshold over which you can trip.
- Over time, dust and dirt accumulate in the bottom rail, making cleaning difficult.
The upper rail is involved in the smooth movement of the door, while the lower one is used as a support. But there are sliding doors, the fastening mechanism of which provides only one rail - the top one. Such doors are called hanging doors, and are the most popular.
Hanging sliding doors without bottom rail.
If you decide to install this type of door, then make sure that the quality of the upper guide is of the highest quality, otherwise the rail may sag under the weight of the door leaf. When installing, you must follow the instructions and photos exactly. Lasting metallic profile and reliable fittings are the key to a successful purchase of a slider or door on wheels.
The roller device ensures easy sliding of the door along the rail. To choose the right roller mechanism for sliding interior doors, you should pay attention to the presence of the bottom rail, the weight of the leaf and its size. If the door is equipped with a bottom rail, the rollers are installed closer to the corners at the bottom and at the top in the middle. The rollers are covered with wear-resistant rubber. They use bearings that make it possible for the door to slide silently when opening. Thanks to dust protection, the bearings have for a long time operation.
Most often, the rollers are attached only to the door leaf, but the design of the sliding door provides for their attachment to a frame, and externally such a mechanism looks like a groove.
Hanging doors with several leaves are equipped with a different device - rollers connect the leaf and the frame using a lever on a hinge.
This mechanism makes it possible to build closed door leaves in one plane.
Stoppers serve as limiters for door movement, simultaneously fixing and holding it.
It is worth paying attention to the fittings: they look unusual. Sliding interior doors, due to their design, cannot be equipped with conventional handles, because they will interfere with the movement of the canvases. Such doors use handles in recesses that do not protrude beyond the width of the door leaf. If not interior doors are used, but entrance doors, then special locks and closers are attached to the mechanism.
When ordering a sliding door, it will be accompanied by instructions describing the mechanism, assembly diagram and photo.
An example of a sliding door delivery package.
Description of a typical device
After description general principles operation of all included parts, we provide a typical description of the mechanism sliding doors. It should contain the following parameters:
This makes it easy to check the integrity of the door kit.
Sliding door mechanism diagram.
Self-installation
Create unique interior apartments and increase the usable area of the apartment easily. For this purpose there are sliding interior doors. Do-it-yourself installation will help you save money.
It will require an understanding of how the mechanism works and a small set of tools.
After purchasing a sliding door with everything you need included, you can begin installing it. To do this we do the following:
- We make the markings that will be needed for the guides. To do this, measure the height from the floor to the door with a tape measure. Do not forget to add 15-20 mm to the resulting figure for the space between the floor and the door, plus the height of the profile guides and the assembled mechanism.
- Make several marks on the wall and connect them with a line.
- There is another way to measure the height of the guides, but it is not so accurate. To do this, you need to attach the door leaf to the opening, marks are placed along the upper edge, and the parameters of the mechanism and guide are added to them.
- Before installing the guides, make sure that the drawn line is strictly horizontal. The easiest way to do this is with a level. This way you will protect yourself from annoying mistakes and the need to redo the work.
- Now we proceed to install the guide, and mount it so that the line is on top. The fastening method depends on the type of rail. Some models offer wall mounting using dowels, while others are mounted on brackets or beams. Fix the rail not close to the wall, but at a short distance from it, so that when opening the door the doorway does not interfere.
- Important note: the length of the rail must be twice as long as the doorway, otherwise the first time you open the door it will simply fly off the guide. When calculating the length, add a few more centimeters of spare space.
- Now you need to insert the mounting bolt inside the carriage and locate the entire resulting mechanism inside the rail. A regular single-leaf door requires only two rollers, while sliding doors or accordion doors must be equipped with rollers according to the number of movable leaves.
- Install carriage brackets at the top of the door with a gap of 3-6mm from the edge. This method of fastening is permissible for any canvas except glass. Glass doors are secured using special clamps with screws. Also, given the weight of the glass, any door made of of this material supported from below the second guide.
- After installing the roller mechanism and fasteners, it is time to install the door leaf in place. To do this, carefully lift it and screw the bolts into the brackets. To make your work easier this stage requires helpers to secure the doors smoothly and effortlessly.
- If the sliding doors are installed level, all that remains is to decorate the doorway and slopes. If debugging is required, it can be done using bolts.
Because of my unusual design Sliding doors require a certain type of hardware.
Now all that remains is to install the fittings. Installing a door yourself will help you better understand its mechanism and ensure the quality of installation.
To ensure that the interior door does not swing, but slides to the side, various mechanisms with guides for sliding doors are used. Let's understand how these systems work.
Before planning which mechanism you will use when installing sliding sashes, you need to decide on the type of structure itself. They can have one flap that slides to the side or several. They may be moving in the general direction, or at least one leaf will move in the opposite direction. Particularly interesting are designs of 4 or more parts, and they can move apart not only along their plane, but also fold like an accordion, which creates completely new ideas for using space.
So, the simplest type is exactly what was described in the first example, that is, one-, two-, three- or even four-leaf doors. The first option, when opening, moves freely along the guides, usually to the right, but the 2 doors diverge to the sides, like in an elevator or in a subway car. If the door has 3 parts, the 2 outermost ones are on the same level and move apart in opposite directions, and the 3rd one covers one of the leaves, moving in the same direction as it. And finally, the 4 parts are divided into 2 pairs, each of which moves opposite to the other, and one panel overlaps the second when opened. Another type is the same two-, three- and four-leaf doors, but of the cascade type. Their main difference is that all the doors move only in one direction.
One- and double doors They can be moved either along the wall, covering part of it in the open position, or buried in it, going into special grooves.
Sliding interior doors
The next option is compartment doors, when two doors, converging when closing the opening, do not close, but, moving along two parallel guides, slightly overlap their edges. In this case, if the opening is sufficiently wide, 1 part can be stationary, and the second can move freely along the guides. In essence, the previously discussed three-leaf version can be made as a coupe if the middle, third part, closing the opening, slightly overlaps the edge of the panel moving towards it along parallel runners.
Next comes the radius sliding door. To make such a structure, you need to have a rounded wall instead of one of the corners and an opening in this area. Otherwise, except for bending along a certain radius, the doors are not much different from ordinary sliding doors. In the open position, they will overlap small sections of the wall on the sides of the opening, and in the closed position, they will close together, like in an elevator. Accordingly, the single-leaf version simply slides to the side along the guides. In some cases, radius doors can be buried in special grooves if the wall is thick enough or the niche is made of plasterboard.
And finally, the last type is accordion sliding doors. Doors of this type are equipped with rollers sliding along the top edge on special turning platforms. The panels themselves are connected to each other by ordinary or piano hinges, several pieces each, depending on whether such structures are made in the form of one or two “curtains”. It is noteworthy that the width of the sashes can be different, for example: narrower at the edges, and wider closer to the middle of the opening. The number of panels in each group is practically unlimited, except for the distance between the side ends of the interior opening.
Having chosen the one you like with the doors sliding to the sides, you need to carefully consider all the mechanisms available today that are included in the sets of sliding systems (SRS).
There are relatively few of them, and the simplest type is suspended. In fact, this is only one guide along which the rollers move, but it is very powerful and can withstand heavy loads. A groove is made at the bottom of the door leaf into which a ridge stop placed on the threshold fits so that the door does not swing when moving. However, if the groove does not allow it to move from side to side, then it can quite warp slightly in its plane, due to the relatively free position of the rollers inside the guide.
Hanging view of a sliding door structure
Unlike not very reliable (albeit inexpensive) suspension systems, which quickly become unusable during active use, KRS with two guides are much more durable. This option provides for each sash of the structure a lower groove in which an additional roller moves, which also serves as a stop. As a rule, such mechanisms are installed on compartment doors and accordions.
It should be taken into account that the presence of bearings in the rollers increases their service life and increases the smooth movement of the panel. The number of wheels is also of considerable importance; for panels with a large weight, 4 rollers are required in each carriage.
So we've covered everything possible options, which you can install in your home with your own hands. However, now you need to correctly combine sliding systems for interior doors and the type of preferred design.
As already mentioned, compartment and accordion doors require lower guides. Moreover, the first option requires a separate gutter for each panel and a separate suspension system, respectively, while with an accordion the mechanism moves exclusively in one plane. Conventional sliding doors work on the same principle, and you can make them hanging for savings and ease of assembly with your own hands.
Bottom accordion guides
Radius sliding structures are much more interesting. Of course, their mechanism is no different, but all the carriages are rotated in relation to each other in an arched guide. Such a design must have a support roller and, preferably, more than one, so that the sash does not jam during sudden movement.
Glass doors also have some special features if they do not have wood, metal or plastic frame. When mounting rollers directly to thin glass, special overhead slats with rollers in the upper part are used; they are screwed along the entire length through small holes. At the bottom, instead of a roller or stop, a narrow guide groove is sometimes installed.
How to properly install a sliding system with your own hands
How to install a sliding door system with your own hands - step-by-step diagram
Step 1: Marking
First of all, you need to take into account that even for the simplest hanging mechanism the old door frame is not suitable, and therefore the jambs will need to be dismantled. Only when you have an empty opening left can you make markings under new design. Stock up for the future decorative panels for masking the top guide and platbands for finishing the ends of the opening.
Now we measure the height of the sash and add 15 millimeters to the result obtained for the lower gap. We measure the required distance along the wall from the floor and make marks along which we draw a line, after which we place the door next to it, wedging it from below with wedges, and check the correctness of the calculation.
Step 2: Install the Guide
We measure the width of the already assembled mechanism (you need to check it in action to make sure there are no defects). Then we add the width of the guides and mark the locations of the fasteners, focusing along the line of the top edge of the door panel. We disassemble the mechanism for further assembly already on the sash. If there is only one top rail, you can fix it with your own hands on a pre-attached one to the wall. wooden beam. If there should be 2 or more hanging profiles for rollers, then special brackets are installed, screwed to the wall with several long screws.
Hanging the door
And finally, the most crucial moment - in the lower part of the door you need to either make a groove with your own hands, if a stop knife (comb) or a leash will pass there, or secure a plate with a lower roller. The latter needs a special gutter, which is mounted on the line of movement of the door and acts as a threshold; to install it, use a plumb line or laser level so that the sash does not become distorted. Now all that remains is to hang the door on the mechanism, securing the previously installed hinges using a special adjusting screw, which allows you to more accurately set the height of the door relative to the floor.
When assembling such a system with your own hands, special attention should be paid at the very beginning to aligning it with the level of the guide so that there is no tilt towards the opening of the sash. Otherwise, we can confidently predict that the door will open on its own, and the load lock will quickly fail. IN as a last resort, you can make a slight tilt towards closing, then the sash will always strive to close, but the small tilt angle (no more than 2 degrees) will not allow it to do this quickly. If you make synchronously sliding doors with your own hands, do not forget to adjust the cable to final assembly systems.
Sliding doors are a very convenient and compact design that is perfect not only for dividing interior space, but also for zoning rooms. It's universal modern version, which is extremely popular. When choosing sliding doors, it is important to know what mechanisms they have and how they work.
Kinds
Sliding interior doors, depending on their design, are divided into certain types. Yes, there are:
Rail with different numbers of leaves
These can be structures with a rail at the top or bottom, or there can be double-rail models. The most popular are products with one top rail. They look very elegant and unusual. Such doors can be single-leaf or double-leaf. It all depends on the width of the passage in which they are installed.
Radial
These doors are quite unusual and completely transform the interior of any room. They are quite massive. All such structures have the shape of a semicircle. Typically, they are made from tempered glass thickness of at least 8 mm. This design also assumes the presence of a rail mechanism. This type of door is perfect for zoning.
"Harmonic"
These are models that fold sideways and each sash is assembled in a zigzag pattern. Each section of such a door is superimposed on each other in turn and the door folds very compactly. The design looks very light and usually has bright design. They can be installed in any passages.
Recoil
This mechanism involves moving the door inward and to the side when the door moves. This type includes a sliding door. In this case, on the wall adjacent to the entrance there is special frame, in which the leaf is located at the moment when you open the door. In addition, such models may have specially designated places in the wall in which this structure is hidden.
Combined
Principle of operation
Most models have mechanisms with guides. The door leaf is usually presented in the form of one or two leaves, but there are also models with a large number of leaves. The canvas moves along guides located above and below on special rollers. Thus, there are models with a single-track type of movement, in which the lower guides are completely absent, and the canvas moves along the upper one.
Double-slide type - when the door moves on the bottom rail, and is held on top by a stop to ensure an ideal vertical position. Heavy weight structures have this principle of operation.
The principle of movement of the sash may be different. It can move along the wall, as if overlapping it. The second option is to move inside the wall. It would be correct to say that door leaves they hide not inside the wall, but inside the cassette located there.
Another option is movement with overlap, when one movable leaf covers the main blind one, which stands without movement. This option is the simplest, but not very convenient; it is completely unsuitable for narrow passages.
Design options and their characteristics
Door designs can be varied. So, there are the following types:
Synchronous
This option differs in that it allows you to open two doors at once. In this case, the door leaf is divided in two and opens in different directions along the wall. As a rule, lighter materials are used for this, since the overall structure will not support a heavy door leaf. The design includes rollers, guides, cables, hooks, as well as special fixtures for fastening. This is a rather complex, but generally reliable mechanism. It will be quite difficult to install such a door yourself, so installation is most often trusted only to professionals.
Telescopic
This design option is suitable for installation if sliding system includes at least two doors. As a rule, these are two or three doors, which move in one direction when opened. The doors are secured with a special synchronizer and placed not on one guide, but on two different, parallel ones. Thus, the doors also move synchronously, but one main door pulls all subsequent doors. This design is fixed either at the top doorway, or at the bottom using an aluminum profile. It is along them that the doors move with the help of support carriages.
Typically, this design uses rubberized rollers, which allow the structure to move very smoothly and silently.
Invisible
This is a very convenient hidden type mechanism, which is hidden behind a specially designed false panel. In another way, this design is called a compartment design. No threshold is used for its installation. This mechanism is attached to the top of the door.
The peculiarity of the invisible mechanism is that its installation is possible only if a place inside the wall was initially provided for it during construction.
If the thickness of the wall is not enough to hide sliding doors in it, then you can use a special pencil case for this. Thus, this figure can be increased by the size of the pencil case. An invisible mechanism is used only if the door is not glass. It is unacceptable to use such a door leaf in this case.
Suspension
This mechanism is also called Standard. It is a design without a threshold, which also does not have a bottom guide. The door slides only along the top rail. The structure itself is open and moves to the side along the wall. Mobile hanging doors can be easily installed with your own hands.
Barn
This type of mechanism is most often made of steel. This design is of the open type and includes a steel guide, rollers and door leaf. This mechanism is most often purchased for fairly spacious passages. The barn mechanism is quiet and smooth. As a rule, this quality is ensured by reliable bearings. Often this mechanism is supplemented with a special closer.
Tram
This design option has rollers not at the bottom, but at the top. That is, the guides are most often located on top, and the door structure is attached to them using special elements and moves along it using special rollers that roll only along the upper part of this runner. This mechanism is perfect for decorating an apartment or house in a retro style.
Locking
This sliding design requires the presence of additional fittings in the form of a lock or lock cylinder. The latch or lock is mounted in a locking mechanism that will be activated when the lever is pressed. The locking mechanism may be different. To do this, they often use buttons that can immediately block the movement of the door. So you can close it and lock it, or open it and lock it in a position convenient for you. The locking mechanism is installed in any door leaf. Such designs can be locking, turnkey or magnetic.
Sliding systems
There are also various variations of sliding systems.
Coplanar
Such a system assumes the presence of a separate runner for each door leaf. Thus, when you open this structure, each half slides over the other half. Most often in this case, models with two door leaves are used. But if there are three panels, then the sliding system becomes three-slide.
An alternative to the coplanar sliding system is to install the central section on a separate runner, and the two outer ones on one common one. Thus, it will not be possible to open two sections at once, since two door leaves located on the same slide will not allow this to be done. When closed they have a stepped design open type. One part of the guide will always be visible.
Door leaves are installed in separate runners more often than in common ones. This option is suitable for both three door canvases This way, when the doors close, they line up and cover the tracks. For this purpose, the sliding system is supplemented with special brackets with a running mechanism. Such a door is somewhat reminiscent of a compartment, but when opened, the door leaf moves slightly forward and to the side, which makes it different from a compartment door. By closing the door, the canvases are put in place and the ladder system becomes invisible.
The coplanar sliding system is distinguished by the fact that it is a combination of several types of mechanism.
This is a very convenient and versatile design.
Fast
This is a system whose mechanism is based on supports. It does not have a frame and also requires guides. As a rule, these can be single or double designs. Both metal and plastic are used as materials for guides for sliding systems of this type. But the guides themselves are usually very narrow, so they save space in the room. No milling is required to install such a door.
Ghost, or hidden
This design and all door fittings are completely closed from prying eyes. The guides are not visible either above or below the opening. Most often, it is still located on top, but is very invisible, thereby expanding the space. There are very convenient hidden models in which the guides are not located in door frame, but directly inside the door. Thus, only the mount and rollers are mounted on the wall. This way the sliding system becomes completely invisible, and when you see it, you even get the feeling that the door is literally floating in the air. Such door models and sliding systems are perfect for more modern-style interiors, as they look very unusual and elegant.
Aristo, or rotary
It is characterized by the fact that it works from rotary mechanism. As a rule, to create it they use aluminum profiles and other components made from the same material. This is one of the most reliable and durable sliding systems, which at the same time allows you to save room space. It is quite easy to install and operate.
Advantages and disadvantages
A huge advantage of any sliding structure is its compactness. It allows you to reduce doorway and makes it easier. It can also make the passage wider and higher, especially when it comes to hanging models. Sliding design does not require a swing, so you can furnish the room into which the door leads at your discretion, without taking into account the design of the door.
Another big advantage is that this the door moves very smoothly and silently. It will not wake up household members with unnecessary claps and other loud sounds. Besides, sliding mechanism The door prevents animals' tails or children's fingers from slapping as the door closes very smoothly.
Separately, it should be noted the advantages of coplanar sliding door systems. This mechanism minimizes the appearance of unnecessary gaps, which cannot be said about other doors. This ensures not only the proper level of sound insulation, but also the entire closed structure creates a feeling of unity. Another advantage of the coplanar system, as well as other types of closed structures, is that the guide rails are closed from prying eyes. In addition, since they are located inside the structure, dust and dirt do not accumulate on them, so the structure becomes quite easy to maintain.
The coplanar system has many advantages over compartment doors, since the passage is completely cleared and the door takes up much more space. less space. The same can be said about “accordion” models, since they are compactly assembled near the door jamb when opened.
The sliding door mechanism has various latches, which is its undoubted advantage. This way you can lock the door in a fully open, half open or closed position and can adjust to make it easier for you to pass through. In addition, this mechanism and this function helps prevent doors from slamming at the wrong time.
Another advantage of sliding doors is that they require little space and can be installed by almost anyone. This applies most simple mechanisms, such as coupe or accordion. In addition, a big advantage is appearance such products. They look more interesting compared to classic swing doors. There are more design and selection options different types mechanism.
But such doors have a number of disadvantages. Thus, some systems, such as coplanar, have restrictions on the size of the doorway.
They are acceptable only if the door leaf width is from 150 to 300 cm. If the width doorway more or less, then installation will not be possible. These systems also have weight restrictions. The door should weigh no more than 55 kg, otherwise the mechanism may not withstand it. The same applies to hanging sliding doors.
The disadvantage of almost all sliding doors and their mechanisms is that they cannot provide the proper level of sound insulation. This is due to the fact that the sliding system is not completely sealed, in which it is very inferior swing structures. This drawback is caused by the fact that the design includes many components and there are gaps between them. This is why sliding doors are very rarely used for installation in the kitchen or bathroom. They easily let in odors, excess noise and can distract other household members.
In noisy rooms for meeting guests It is better not to install such doors, since sounds will penetrate in any case. Due to low airtightness, the sliding door mechanism does not allow for proper thermal insulation, since cold air currents can penetrate from one room to another, forming drafts.
Another disadvantage is the high cost of such structures compared to classic swing ones. This mechanism itself is not very reliable and requires special care. It needs to be lubricated and checked periodically.
Hinged doors are more resistant to external influences than sliding doors. Sliding models cannot cope with the protective function. In addition, some mechanisms can jam, especially the hidden types that are hidden inside the wall.
Thus, to correct this deficiency, you may even have to dismantle the wall, which is difficult and problematic.
How to choose?
For lightweight door panels, hinged synchronous mechanisms are more suitable. This is due complex design and in the first case, by the presence of an upper guide, and in the second, by the presence of several parallel guides. Plastic structures are also perfect for them. Fabric elements are often used for accordion doors.
The most versatile door is made of chipboard. This material is lightweight and practical, and it is quite inexpensive. Along with them are universal models made of MDF, which are also suitable for any door mechanism. Such models are often covered with veneer or decorated with carvings by milling.
For many sliding door mechanisms, an important requirement for the door leaves is the presence of leaves that are absolutely identical in size. That is, they must be equal in both length and width.
This applies to both coplanar models and accordion, synchronous models and sliding doors. Hidden telescopic structures are completely unsuitable for using glass doors.
For pencil cases, you can even choose heavy wooden models. For folding mirror doors you can use the compartment mechanism. For lightweight door structures, almost any type of mechanism can be used. In this case, you can choose a telescopic, hidden, synchronous mechanism, as well as rotary or radius products. For models with two doors, the coupe type mechanism is most suitable.
When choosing a mechanism for sliding doors, great attention must be paid to the materials from which it is made. It is better if it is metal, even if the door frame is wooden. When choosing, try not to save on purchasing such doors. Otherwise, the design will not serve you for very long.
Much attention is paid to the roller system. This is especially true at the time of installation, since a misalignment or incomplete set constituent parts and guides can lead to breakdown of the entire structure. When choosing, also rely on the acceptable materials for a particular mechanism, as well as the weight of the structure itself. If the mechanism is not very reliable, then it is better to give preference to lightweight materials for the door. When choosing a mechanism, try to also take into account the size of the doorway and the door leaf itself.
