Interior Doors: Buyer's Guide

2023 Author: Douglas Hoggarth | [email protected]. Last modified: 2023-05-24 11:23

The choice of one or another door for your home, office or summer cottage can sometimes become a kind of compromise. Indeed, there is not always complete and reliable information about the elements that make up the quality formula, and therefore the choice is made on the basis of very rough and partial estimates, which often turn out to be erroneous.

INTRODUCTION

This was the reason for creating a practical guide for choosing interior doors. From the experience of everyday work, a simple, understandable guide was prepared that can provide consumers with a specific guideline in the search for interior doors.

WOOD. ENDLESS STORY

Close, solid, warm, valuable, alive, hospitable: these adjectives for wood bear the stamp of our history, and in this friendly and family element one can recognize thousands of threads of everyday life that weave the path of our civilization.

The trees of our forests are natural wealth, which is renewed through self-reproduction, and therefore it must be approached accordingly. Taking from the forest what the forest can give without disturbing the natural balance means using this wealth wisely and with care so that it remains viable and does not lose its value.

The constant development of technical thought allows organizing more rational and waste-free production. The most advanced woodworking industries invest huge amounts of human energy, money and knowledge to protect forest cover around the world also through continuous improvement of the entire production process. The search results open the horizons for high-tech industries (such as the production of fiberboard and chipboard, block type wood and plywood from poplar), which are an important achievement in this area and allow eliminating losses, using materials of small size and greatly increasing the parameters of stability and durability of products, which became possible after a number of studies in specialized laboratories. From this point of view, it is the advanced woodworking industries that are at the forefront of the struggle for environmental preservation.

WOOD. ANTIQUE AND MODERN MATERIAL

Since ancient times, wood has been a traditional material for making door and window frames. Due to its insulating properties from cold and noise, due to its flexibility in use and ease of maintenance, a wide variety of colors and textures of various types of wood, wood has become and remains the most used material in the production of interior doors. Thanks to technologies and treatments (drying, impregnation, tinting, varnishing, etc.) used by industrial woodworking enterprises, interior doors made of wood provide users with additional guarantees of quality, durability and stability of the product.

According to the German Institute for Binding Technology, which is an institution that studies the behavior of various materials, wood binding is considered very good according to the following evaluation criteria: variety of colors, the ability to process both in size and shape (variety of typologies), resistance to wear and tear and atmospheric factors, water resistance (permeability of joints and resistance to direct moisture penetration), thermal and sound insulation, resistance to condensation, cleaning, repair.

Wood has another property that distinguishes it from other materials: it is alive and reflects in itself incomparable symbols not only of the wood species, but also of the single plant from which it originates. The tree itself, it is singular, unique and at the same time similar to other trees from the same forest in the development of texture, in the grain lines, in the presence of small healthy knots, making the tree immediately recognizable as a real expression of life in a plant. In this regard, a certain door or window sash made of the same wood may differ from one another in color, for example, while leaving the typical characteristics unchanged. If the results of research and technological development are used in the production of wooden doors and windows,this allows you to achieve and maintain the performance and warranties for wood products that are the same or even better than those of any other material.

DOOR. FUNCTIONS, ELEMENTS AND TECHNOLOGIES: ATTRIBUTES OF QUALITY

WHAT DOOR MEANS?

The door is opened and closed, pretended and closed, thrown open, and finally the door is slammed. They put them out the door and meet them at the door. You may be rudely asked to close the door from the opposite side, or they may be told that they will wait for you all night at her place. A closed door can seem mystical, unifying, forbidden, close, arrogant, discouraging, patronizing. If the door slams, then someone is angry; sometimes, however, this can be the cause of drafts. Eavesdropping under the door; tears or smiles are hidden behind the door; linger at the door, saying goodbye. The door is the border between your inner self and the outer world.

QUESTIONS OF TASTE

There are many reasons that determine the purchase of a new door for residential and non-residential premises: someone needs a lot of free space and wants to create a more rational division of space at home; someone is more sensitive to the problem of style and is looking for a particularly refined design, with particular attention to finish and detail; there is someone who wants to detach himself in his quiet corner, in order to leave behind the door everyday worries, problems and their own failures; someone just wants to replace the old, out of sight and creaky doors; and there is someone, finally, who wants to bring a fresh stream of novelty and personal touch to the decoration of the house.

The choice of doors is huge, and this is due to the many tastes of buyers. But, regardless of the lifestyle, the main requirement for the door was and remains the guaranteed quality and constancy of characteristics over time.

INTERIOR DOOR ELEMENTS

False box: A finished product made of solid pine or galvanized sheet iron. It is built into the opening and serves to improve and simplify the process of installing a door or window frame. Unfortunately, false boxes have not found proper application in Russia due to the fact that our door installers and builders prefer to foam boxes in the opening and / or install boxes through special metal corners. This simplifies, speeds up and reduces the cost of the installation process itself, but do not forget that after a few years the foam may begin to crumble and the door will lose its fastening rigidity in the wall opening.

Box: This is a construction of fixed door profiles on which the leaf is hung. The door frame consists of 2 uprights and a crossbar. Boxes are available with longitudinal slots for telescopic platbands and without them. Usually boxes are made either from MDF, or from veneered lamellar wood, or from solid wood. The first two options are the most resistant to changes in temperature and relative humidity.

Door leaf: A movable part of a door frame that covers and opens the opening in the wall. The canvases are smooth, deaf, with convex and flat panels, which are most often made of veneered MDF or chipboard, as well as from solid wood. With sharp changes in relative humidity and in dry rooms, massive panels can change their geometry and decrease in area, which leads to the appearance of unpainted panels along the glazing beads. Canvases also come with cutouts for glass, with grilles of various designs. The most common structure of the canvases themselves consists of an internal frame made of solid coniferous wood with a honeycomb filling, which gives the canvas increased durability and constancy in time of its geometric dimensions. Webs with a honeycomb structure are lighter (about 10-15 kg),which reduces the additional load on the hinges. Cloths made of solid wood and filled with chipboard are heavier (about 20-30 kg) and require the use of more massive loops by the plant. However, we recommend that you do not leave doors with solid wood leaves open for a long period of time.

Platbands: Elements that cover the joints between the door leaf and the frame, on the one hand, and, if applicable, false frames on the other. Platbands are made of veneered MDF or plywood, as well as solid wood. Platbands are most often flat, curly in the Baroque style and semicircular. Platbands are also divided into overhead and telescopic with wings for insertion into corresponding boxes. The use of telescopic casing improves the aesthetic perception of the joint between the casing and casing and allows you to adjust the casing width from 1 to 2 cm.

Accessories (fittings): Handle, lock, seal, hinges, glass.

MAIN TYPOLOGIES AND DIRECTIONS OF OPENING

The main typologies are: (1) - smooth or "blind", (2) - opaque rectangular frames (smooth "blind" or convex paneled), (3) - with long glass, (4) - transparent rectangular frames, (5) - lattices are opaque "deaf" and with transparent glass.

The main types of opening: (6) - single-leaf swing, (7) - double swing, (8) - sliding on the wall, (9) - sliding in the wall opening, (10) - folding "book", (11) - salon type (the canvas can open to both sides of the wall opening).

Directions of opening: In Russia they are defined as follows: if we take as a basis that the door must be opened by pulling the leaf towards itself, then if the leaf turns out to be on the right after opening, then the direction of opening is considered to be right; if the leaf turns out to be left after opening, then the opening direction is also considered to be left. Notice! In Europe, the opening direction is taken opposite from the Russian one, because there this procedure for determining the opening of the door direction is done by pushing the door leaf away from you. Accordingly, if the canvas leaves to the left when it is pushed, then in European terms such an opening is considered to be left, if the canvas when it is pushed goes to the right, then the opening is right.

Sizes: Doors are assembled by manufacturers according to certain standardized dimensions. European standard dimensions "on the canvas" (in fact, this is the effective size of the internal light opening of the box) are as follows: 600 - 700 - 800 - 900 mm in width and 2100 mm in height. In Russia, the standard height is 2000 mm, inherited from Soviet times. It should be noted that recently a lot of new housing, from popular to elite, is being built with openings that have the size of the internal light opening of the box "for Europe", i.e. height 2100 mm. To calculate the required wall opening, take the conditional size along the canvas and add 10 cm in width and 5 cm in height. At the same time, 1 cm remains between the outer surface of the box and the wall opening for foaming or other fastening elements.

TECHNOLOGIES FOR PROCESSING WOOD AND ITS DERIVATIVES

Wood is an organic material and can be subject to chemical, physical and biological effects. In this regard, wood, in the process of industrial production of doors, undergoes stage-by-stage treatments of various types, which give the final product properties that meet the market requirements for constancy of characteristics. This is the only way to guarantee mechanical resistance, invariability of linear dimensions, stability of the product during operation, during which changes in humidity and temperature in rooms often occur.

Before starting any wood processing process, it is necessary to carry out serious and effective processing in drying chambers, which helps to stabilize the internal moisture content of the wood.

Drying wood: The ability of wood to absorb and retain moisture makes it necessary, before starting woodworking, a very gentle drying process. This will largely eliminate possible problems with wood swelling and changes in its geometry depending on the level of relative humidity in the room.

Artificial drying is carried out in different ways: in a highly discharged environment, by means of moisture condensation, by air blowing. The entire drying cycle requires very sophisticated equipment to avoid wood distortion, cracks or internal stress that may arise from minor drying defects. Good wood stability is achieved already at 10 -12% relative internal humidity.

The constant attention of advanced woodworking industries to the problems of reducing their waste and rejects by using wood in a more rational way, on the one hand, and by using high-quality wood with a high degree of sustainability, on the other, made it possible to produce various wood derivatives that have very good quality and specifications.

Medium density fiber boards MDF: fibrous boards of uniform thickness are produced from timber and waste (scraps) of woodworking, which are ground to small cubes (chips), subjected to steam treatment under high pressure and, subsequently, fed to the rotating defibering discs (grater machine). All wiped and felted material immediately goes to drying and subsequent gluing. This type of semi-finished product has excellent characteristics of compactness, fiber adhesion, as well as dimensional stability over a long period of time. The strongest aspect of this material is the extremely favorable ratio between hardness and thickness: MDF sheets can be from 4 to 22 mm. Recently, door blocks with frames and platbands made of MDF began to appear,covered with veneer of valuable wood species or a fairly new material - synthetic veneer "laminatin", many times higher than its natural "relative" in many respects, and above all in terms of wear resistance.

Sheeting (lath-type wood): This is a semi-finished wood product, it is made by gluing listels (laths) from dried pine or poplar, taking into account the multidirectionality of the wood fibers of neighboring bars for better stability of the entire block. For example, for door frames, most often made of just such a material, gluing takes place in two layers with an intermediate damped sheet of thin plywood. Subsequently, such a "cake" to mask the joints is covered with natural veneer of valuable wood species. The finished product has the aesthetic characteristics of solid wood, but with more optimized performance characteristics.

Particleboard Particleboard: These are panels of uniform thickness, consisting of fragments of wood (shavings), mixed with a binder based on synthetic resins, and obtained by pressing.

Poplar plywood: A material consisting of many sheets of wood of various thicknesses, glued one on top of the other, crossing the direction of the fibers of adjacent layers to better stabilize the characteristics of the entire product. Possesses high stability and hardness.

Drying treatment:

Definition: A treatment aimed at reducing the relative internal moisture content of wood in order to increase its hardness, stability and durability.

Advantages: interior doors made of this kind of wood do not deform and retain their aesthetic and functional properties that remain unchanged over time.

Production of MDF panels:

Definition: Production of a semi-finished product from wooden chips (small cubes of irregular shape), providing excellent fiber adhesion and compactness.

Advantages: The use of this material in the manufacture of interior doors allows the latter to acquire the properties of excellent planarity of the leaf surfaces, surface hardness and impact resistance. In addition, excellent aesthetic results are achieved with excellent paintability. This material is widely used for the manufacture of veneered and laminated platbands, extensions, frame racks, pantographed paintings for painting and various covers for entrance doors.

Lamellar wood production:

Definition: Produced by gluing dried coniferous wood blocks.

Benefits: Used to make interior doors that showcase the attractiveness of solid wood doors. It is particularly resistant to deformation, cracking and drying out with a reduction in size. It is irreplaceable in the production of veneered box racks and veneered tying of canvas racks. By its properties and prestige it is not inferior to solid wood.

Chipboard (chipboard) production:

Definition: Production of a semi-finished product consisting of wood chip fragments mixed with a binder made of synthetic resins and subjected to pressing and sintering.

Advantages: The use of this material in the production of interior doors allows to achieve significant results in terms of planarity and stability of the geometric dimensions of the door. Also wears sound-absorbing functions.

Plywood production:

Definition: it consists of many sheets of wood of various thicknesses, glued together with special adhesives, mostly based on synthetic resins. To increase stability, wood sheets are glued with multidirectional fibers.

Advantages: The use of this material in the production of interior doors allows achieving good results of strength and stability over time. Most often, plywood sheets are used in the production of platbands, boxes and their expanders (addons) veneered with valuable wood species. Plywood sheets are also used for the manufacture of pantographed canvases and decorative covers for entrance doors.

MORE DETAILS ABOUT DOOR COMPONENTS

BOX:

A necessary component of the door, on which the canvases are hung, and to which expanders and platbands are attached. It is made of various materials, depending on the subsequent use: sheet wood, plywood from multidirectional poplar sheets and MDF panels. In the production of box racks, veneer sheets of various types of wood are then glued to them: tanganica walnut (Aniegre), mahogany, oak, European walnut, cherry, mansonian walnut, teak, ash, pear, birch, etc., or racks boxes are painted with special polyurethane or more modern water-based dyes. Boxes come in a wide variety of shapes: from traditional rectangular to rounded with different curvature diameters and complex curved ones. Racks and crossbeams of a box with a rectangular cross-section are joined at 90 degrees,and the round boxes are joined at 45 degrees with the obligatory cutting of the racks at the factory on high-precision equipment. In the boxes, rubber seals of white, black or brown colors must be installed in special longitudinal grooves. The boxes are completed with either overhead flat trims, or telescopic flat, rounded or curly trims. Racks of boxes are also used for framing rectangular and rounded openings in the upper part (arched framing). In this case, there is no quarter sample for the canvas in the rack racks. LEAF:The boxes are completed with either overhead flat trims, or telescopic flat, rounded or curly trims. Racks of boxes are also used for framing rectangular and rounded openings in the upper part (arched framing). In this case, there is no quarter sample for the canvas in the rack racks. LEAF:The boxes are completed with either overhead flat platbands, or telescopic flat, rounded or figured platbands. Racks of boxes are also used for framing rectangular and rounded openings in the upper part (arched framing). In this case, there is no quarter sample for the canvas in the rack racks. LEAF:

The door leaf is made in three ways:

1. Hollow cloth (tambourine with honeycomb structure). Such canvases are made by large industrial enterprises using the most modern technologies. The leaf consists of an inner frame made of coniferous wood with lateral bulges in the middle part of the leaf for subsequent insertion of locks; a periodic structure made of pressed cardboard of the "honeycomb" type, the use of which significantly increases the stability of the geometric dimensions of the web, and also lightens the weight of the web; surface sheets from MDF. A "pie" made in this way is covered with veneer sheets of various types of wood: tanganica walnut (Aniegre), mahogany, oak, European walnut, cherry, mansonian walnut, teak, ash, pear, birch, etc., or coated with special dyes. Such canvases are made both with a quarter on the sides of the canvas and in its upper part, and without a quarter. In the latter case, the canvases are hung on boxes with special invisible hinges, and such door blocks become reversible, i.e. with an independent opening direction, which is decided at the time of installation and allows you to optimize warehouse stocks both at the manufacturing plants and at their distributors in various countries. Hollow sheets are very lightweight, which allows the use of smaller Anuba loops. On the basis of such canvases, both simple smooth and more complex paneled versions of canvases are made.with an independent opening direction, which is decided at the time of installation and allows you to optimize warehouse stocks both at manufacturing plants and at their distributors in various countries. Hollow sheets are very lightweight, which allows the use of smaller Anuba loops. On the basis of such canvases, both simple smooth and more complex paneled versions of canvases are made.with an independent opening direction, which is decided at the time of installation and allows you to optimize warehouse stocks both at manufacturing plants and at their distributors in various countries. Hollow sheets are very lightweight, which allows the use of smaller Anuba loops. On the basis of such canvases, both simple smooth and more complex paneled versions of canvases are made.

2. Cloth from leafy (type-setting) wood. It consists of a structure entirely made of sheeted (type-setting) wood covered with veneer from various valuable wood species. Usually, smooth or convex panels, as well as decorative glasses of various designs, are completed with a lamellar structure. This product has all the high technical characteristics and aesthetic prestige of natural solid wood. At the same time, sheets made of type-setting wood have a very high resistance to changes in temperature and relative humidity when heating is switched on in the cold season. The drying effect, in the case of natural solid wood, can cause various unpleasant changes in the geometry of all kinds of door components. If the prestige of natural wood is more important to you than the practicality of type-setting wood,and the high cost of solid wood doors is not a problem for you, then we strongly advise you to take care of constant control of the temperature and relative humidity in the room by artificially humidifying the air using wet cleaning and wiping, as well as using plants.

3. Canvases with filling. Such canvases are made from hollow canvases, but instead of a honeycomb internal structure, a filling of chipboard or other materials is used, which gives the canvases additional stability and an increased level of noise suppression, as well as resistance to open flame. At the same time, the canvases are quite heavy (25-40 kg), and to facilitate them, longitudinal through parallel holes are made in the filling material.

SOME STAGES OF THE PRODUCTION CYCLE:

To achieve a high level of functionality and aesthetics from a product, it is necessary first to go through numerous stages of modern industrial production. Precision, reliability and technical level of woodworking equipment are of fundamental importance for obtaining a quality finished product and for maintaining quality standards, while the necessary production flexibility due to the use of electronic equipment control systems makes it possible for industrial enterprises to offer a wide and varied range of models to the market. …

Each of the stages of industrial production described below ensures the quality of the final result and the constancy of the characteristics of the finished product over time. Below is a brief description of some of the most important sanding, tinting and varnishing phases from the consumer's point of view.

Sanding: necessary to give the surface of the canvas and the box a high smoothness to achieve high aesthetic results. Usually the sanding process is a multi-stage process combined with the process of priming the door leaves before the subsequent tinting and finishing of the door components.

Tinting and varnishing: This stage, combined with polishing, is the most delicate manufacturing process, good or bad results after which are most visible in the final product even to the uninitiated eye. This process involves applying two or more coats of varnish to all surfaces of the door components to close all the pores of the wood, thus protecting it from moisture and achieving excellent aesthetic results. Until recently, polyurethane varnishes were used for these purposes, but due to the increased requirements of European environmentalists, at the moment these varnishes are being actively replaced by more modern water-based varnishes, which are not inferior in any way in their main characteristics.

Various characteristics of the four main types of varnishing:

a) Transparent type: achieved by applying a thin layer on all external and internal surfaces of the product with a particularly hard and resistant varnish.

b) Tinted type: achieved by applying a colored dye to all surfaces of the product. After this initial treatment, a transparent layer is applied as in point (a).

c) Painted type: achieved by successively applying several layers of matt or glossy varnish to all surfaces of the product.

d) Painted on a polyurethane base with a glossy finish: achieved by applying two or more coats of polyester base lacquer to all surfaces of the product. This type of product, mixed with special ingredients, produces a reaction, forming a very hard and durable film with high reflective properties and gloss. Subsequently, a final polish is made, which guarantees a high aesthetic result and great prestige.

ACCESSORIES:

Nowadays, the choice of an interior door goes beyond just a technical and practical assessment, and has become a means of expressing personal style and taste. When choosing a door to decorate your space, beauty and functionality are equally important. The secret to a balanced choice lies in carefully evaluating the details: in a quality door, in fact, the accessories must meet clear consumer criteria. Handles, locks, seals and hinges are subject to the strictest quality controls.

Locks: their function is to block the opening of the door in the wall opening. In recent years, the constant search for new solutions has allowed us to offer consumers a huge range of locks that can satisfy the most demanding buyers who pay attention not only to the functionality of the lock, but also to the style. With interior doors, European manufacturers usually offer locks for a lever key (Patent), for a cylinder (Yale) and for a toilet latch (WC). These locks are available in many finishes, but the most commonly used are polished brass, polished or matt chrome. Toilet latch locks are installed in bathtubs and toilets, but it has become fashionable to use them also in bedrooms and other rooms. The toilet latch itself has a slot on the side opposite to the handle. If someone feels unwell indoors,then you will have the opportunity to open the door with a simple coin.

Hinges: the function of the hinge is to fasten the door leaf to the frame. Hinges are visible and invisible. In the latter case, when two hinges are installed at the top and bottom of the curtain, this allows the door to be opened independently, i.e. reversible. Such an innovation also carries a more advanced aesthetic aspect, but obliges manufacturers to make canvases without a quarter. Hinges are usually matched with the color of the lock.

Handles: Nothing adorns a door like a handle that matches the design of the door. Style, quality and variety of models are the essential attributes that this irreplaceable accessory must possess. Sometimes there are so many pens offered by sellers that it becomes difficult to navigate in their selection. Let me give myself a few tips. First of all, the color of the handle should match the color of your home furniture fittings, and the handle design should match the door design. Before the final choice, we advise you to literally touch all the pens. It is the tactile sense of touch that will help you decide on a particular model. The handle can leave pleasant and unpleasant sensations on your palms. Also pay attention to the manufacturer. At its core, the handle itself is a solid or hollow piece of brass,on which from 1 to 10 protective layers are applied during the production process, which naturally guarantee, to varying degrees, the invariability of the appearance of the handle over time. Pay attention to the quality if you don't want your handles to darken or peel off after a while. Do not use aggressive solvents such as acetone on pens and do not use abrasive sponges to clean the pens. All handles have a final layer of varnish of varying degrees of hardness and resistance to solvents and mechanical stress. Therefore, do not skimp on pens. May they delight you for many years!Do not use aggressive solvents such as acetone on pens and do not use abrasive sponges to clean the pens. All handles have a final layer of varnish of varying degrees of hardness and resistance to solvents and mechanical stress. So don't skimp on pens. May they delight you for many years!Do not use aggressive solvents such as acetone on pens and do not use abrasive sponges to clean the pens. All handles have a final layer of varnish of varying degrees of hardness and resistance to solvents and mechanical stress. Therefore, do not skimp on pens. May they delight you for many years!

Seals: Correct installation of the seal in the box guarantees increased sound insulation of the door block. Seals are usually factory installed around the perimeter of the entire box. A good seal also contributes to the relative thermal insulation of the room, and also greatly reduces the penetration of dust into rooms. The seal also serves to prevent a dull impact of the curtain on the box, making the door closing more noiseless. Seals come in a variety of materials and colors.

Glass: In interior doors, glass is more of a decorative function, and also contributes to better illumination of corridors and rooms on the northern sides of houses. Glasses are transparent and frosted, white and colored, plain and tempered, smooth and with a perimeter facet, with colored inserts and a sandblast pattern. Beautiful glass has a very serious impact on the design of the door, increasing its prestige, but, unfortunately, glass, especially tempered and bevelled, is quite expensive. Glasses can also break. If you nevertheless opted for a door with glass, we advise, if you have children or elderly relatives, to choose tempered glass, which, if hit, crumble into small granules that do not have cutting surfaces (such as bus glass), or triplex glass with a transparent film between two layers of glass. Don't skimp on glass. Not toughened glass can, in case of beating it, make people standing next to them disabled.

SPECIAL TYPES OF DOORS

In the practice of civil engineering, there is often a need for doors with special characteristics, the main of which are fire resistance and noise suppression. Doors with these features are allocated to a special class of doors and have a specific application.

FIRE-RESISTANT DOORS

There are many fairly strict standards that are taken into account in the manufacture of these doors, the task of which is to protect the room from direct fire and cut off smoke in a specified time interval. According to these time intervals, the doors are divided into resistance classes up to 30, 60, 90 and 120 minutes. Interior doors are manufactured with an open flame resistance not exceeding 30 minutes. Only metal doors with a special filling of canvases and boxes can withstand a longer period of time. Typically, such doors are rarely installed in homes, and their use is mainly limited to installation in non-residential premises such as offices, hospitals, shops, etc.

NOISE CANCELING DOORS

The need for such doors arises on a daily basis, including in our homes. Someone has a child who plays music at home, someone has a home theater and when watching films would not want to disturb the family, someone has a headache and wants to retire from a noisy company. Here are some of the cases when additional noise absorption at the interior door is simply necessary. It should be noted that even in ordinary interior doors without special finishing it is possible to have a fairly significant level of noise reduction of 10/12 dB. It should be borne in mind that blind paneled doors have greater noise suppression than doors with glass or doors with hollow panels. You can independently increase the noise reduction of an ordinary interior door to 12/15 dB if you foam well the space between the box and the wall opening,and also to embed down the canvases special rubber automatic thresholds, which, when the canvases are opened, are retracted into the body of the curtain, and when closed, they go down, increasing noise reduction and excluding drafts, which is also important. Doors with a noise absorption higher up to 22/25 dB usually have thicker leaves with a special inner filling made of perforated chipboard or synthetic wool, with the obligatory use of an automatic rubber threshold. Doors with a noise absorption higher up to 22/25 dB usually have thicker leaves with a special inner filling made of perforated chipboard or synthetic wool, with the obligatory use of an automatic rubber threshold. Doors with a noise absorption higher up to 22/25 dB usually have thicker leaves with a special inner filling made of perforated chipboard or synthetic wool, with the obligatory use of an automatic rubber threshold.

SPECIAL CLASS INTERROOM DOORS FOR PUBLIC AREAS

These doors are designed to facilitate movement in public areas in wheelchairs. Typically, such doors have a door leaf width of at least 80 cm, special return hinges, lever handles at a lower height: about 90 cm (usually 100-110 cm), and also, in the case of glazed doors, glass, whose lower edge is not should be higher than 40-45 cm from the floor.

DOOR CARE

A door is just as important a component of interior decoration as furniture, and needs simple and periodic maintenance to keep its appearance for many years, pleasing your eyes.

It is very important to adhere to some basic principles when cleaning a door. First of all, use only special substances. Most of the spray cleaners available on the market have no protective effect on the door, and in some cases may even damage the outer lacquer finish. A simple solution to this problem is to use a solution that is 90% tap water and 10% alcohol. It is strictly forbidden even to accidentally use cleaning liquids or abrasive powders, which can enter into chemical interaction with the wood of the doors, thus accelerating its aging.

CLEANING

Using the above described aqueous solution of alcohol, you can thoroughly, quickly and effectively clean the door surface. The cleaning procedure is simple: wipe all surfaces of all door components with a damp cloth and a well wrung out cloth, removing dust. Repeat the same procedure with an almost dry cloth, removing traces of moisture.

Attention!! When carrying out work related to plastering walls, or when carrying out work on the installation of floors (tiles, parquet, etc.), a situation of potential danger for doors arises, since during these works chemical components are used that can seriously degrade the quality of the surface finish of the door. If it is not possible to remove the canvases from the boxes, temporarily store them in a dust-free room, then we recommend covering the boxes and canvases with polyethylene or removing paint or plaster stains from the doors in time, as well as dust with a cloth soaked in soapy water.

CARE OF POLYESTER LACQUERED DOORS

There are doors with a glossy polyester lacquer coating, which we recommend to periodically inspect its condition. Forgetfulness or improper care can contribute to scratches and other surface defects. Using a special treatment, it is possible to quickly remove any imperfections in the coating and return the prestigious gloss of varnish to the door. Below are some simple operations:

Lightly moisten and sand the damaged surface in the area of the defect with a special fine sandpaper. Attention!! The grain of the abrasive surface of the abrasive paper or abrasive disc must be 1000/2000. Spread a small amount of polishing wax on the surface to be treated and rub in the wax with a special soft cloth, achieving the same shine.

REGULAR CARE

Routine maintenance is not associated with the need for minor repairs, but is limited to periodic inspections and cleaning. It should be a good practice to do the following every two years:

Check the correct functioning of the door and its components (locks, hinges)

Remove the blades from the boxes to clean the hinges and re-lubricate them with suitable automotive semi-liquid lubricants. Adjust the hinges if necessary.

Remove and disassemble the locks to clean and lubricate its components.

LONG TERM SERVICE

Considering that the average service life of a solid interior door is 30-40 years, I advise in special cases to perform the following actions: