What is the difference between MDF and chipboard: which is better. What is the difference between MDF and chipboard, what to look for when choosing chipboard and MDF, which is better

When choosing furnishings for your home, it is important not only external design products. And the composition of the furniture is no less important. LDSP is a chipboard that is hidden under the laminate of your furniture, no matter what the outside is: alder; nut; wenge. Inside, under the laminate layer, there will always be chipboard. What is better - MDF or laminated chipboard? Let's figure it out.

Pros and cons of laminated chipboard body material

The advantages of chipboard are as follows:

  • fairly inexpensive in cost;
  • covered with many types of laminate;
  • endurance to the influence of high temperature;
  • it is very easy to process in the manufacture of cabinet furniture.

The disadvantages include:

  • strong looseness of matter;
  • poor retention of screws, especially when reused;
  • nails are practically not held inside the slab;
  • service life is no more than 10 years.

When making this building material the composition of the shavings may contain substances that emit in moderate amount formaldehyde. They are quite harmful to humans.

This modern material Produced in large factories from wood shavings. It is ground and mixed with resin. Subsequently sawn into slabs.

What is better and stronger for beds, cabinets, laminate and other furniture

Before gluing, it is necessary to place the panel on a flat surface. The chipboard must be cleaned of dust and other possible contaminants. Clean with grinder. The film is gradually removed from the base. Gently apply and smooth to There are no air bubbles left under the film.

Photo printing can be successfully applied to laminated chipboard. It looks very impressive.

Small shavings of this material are more reminiscent of cardboard. It is made by pressing fine wood dust. Mixed with resins and glue. One side is covered with laminate. The other, wrong side, is covered with glossy plastic, paint or various kinds of films.

Advantages fine dispersion fraction ( mdf):

  • the dose of formaldehyde is minimal, within normal limits;
  • more plastic, which allows you to make furniture in different versions;
  • in production, urea resins modified with melamine are used, which brings the material closer to wood;
  • material may be moisture resistant, unlike chipboard, which strongly attracts moisture. all about moisture-resistant MDF for walls;
  • characterized by comparative strength.

For a kitchen, it is necessary that the material is not only beautiful, but also practical. Matte painted facades from Italian designers are now in fashion.

Ultra interesting options designs are now being created with matte facades. Gloss is easier to maintain. Various contaminants are less visible on it. For practical people, it is better to choose furniture from glossy MDF panels. Using the advice of designers, you can successfully purchase furniture.

Choosing furniture from chipboard and MDF, the difference will be in cost and quality. However, both panels can be successfully used if you need to purchase budget furniture.

What is the difference between children's furniture made from MDF and laminated chipboard?

For successful organization rooms for babies, it is important to take into account the advice of doctors. When the baby grows out of his cozy crib. It's time to take care of arranging the space in his room.

For this you need pick up furniture, which will be:

  • comfortable;
  • comfortable;
  • safe.

A grown-up baby already needs:

  • a table at which he will create the first masterpieces of his creativity, and later do his homework;
  • comfortable bed;
  • wardrobe with drawers for clothes and toys.

All furniture for a children's room should be made from environmentally friendly materials. In addition, you cannot place furniture in a child’s room if the child is allergic to one of the materials from which it is made.

The first thing you need to pay attention to when choosing furniture for a nursery is the quality of the furniture. Products must be certified. The quality must be factory made. The more modules, the more opportunities to create the ideal children's room with areas for relaxation, games and activities.

It is necessary that all furniture is suitable for the child’s age. So that he can get his things or toys from the closet or table.

The chair and table should be such that the baby’s posture develops correctly.

If the size of the children's room does not allow placing full-fledged furniture, the solution will be to purchase modular furniture– transformer. For example, the choice bunk bed helps create personal space for each child. It can have a built-in linen drawer and a closet.

Do not clutter the room with unnecessary pieces of furniture. Only necessary things. If you choose the right furniture, children will feel happy and try to complete tasks on time.

Ecologically clean materials for facades and product bodies:

  • chipboard;
  • natural wood.

E1 is the highest class safety chipboard. If furniture for children is made from this sheet, you don’t have to worry about the quality of the panels. This material is moisture resistant. It is perfect for furniture frames and shelves. It is covered with chipboard with PVC film.

MDF is better suited for making furniture doors. This material is durable and wear-resistant. It is not afraid of moisture and does not deform over time. Resistant to scratches and dirt.

What to consider when choosing kitchen furniture made from MDF and chipboard

If the kitchen is spacious, choose big table. It can be placed in the center of the room when guests arrive. Several chairs can be placed around the table. It is good to choose oval or round tables.

Table models should be combined with the style of other kitchen furniture. A transformer is good for small rooms. It does not take up much space when folded.

All materials from which the furniture is made must be resistant to steam and moisture. For such furniture, choose only quality materials chipboard or mdf.

So that they do not become deformed over time. Choosing glossy surfaces, you can provide yourself with a minimum of cleaning worries. On such furniture stains from grease and other contaminants will not be visible. Matte surfaces are more whimsical, although today they are in fashion.
Simple tips for choosing a custom-made kitchen.

conclusions

The material from which the furniture is made is also important when choosing furniture for the kitchen. The table top can be made from natural wood, stone and mdf. The cost of the latter material is much more affordable.

So, in order not to be at a loss as to which material is better, choose a combination of chipboard and MDF, combine these surfaces and arrange your home to the delight of yourself and your loved ones.

Chipboard and MDF are made from wood, so they are similar in many ways. But besides the cost, there are a number significant differences. Only by understanding them can we conclude what is in specific situation During the construction process (repair, restoration), it is still better to use chipboard or MDF. By the way, this also applies to the choice of furniture. Its strength and durability are the main evaluation criteria, since it is purchased for many years.

  • Chipboard. The first two letters indicate the specificity of the raw material (wood chips). That is, the production does not use dust, as in the manufacture of some types of building materials, but rather large fractions. The last letter indicates the type of product (slab).
  • MDF. The confusion in decoding is due to the fact that when displaying markings, English phraseology is written in Russian letters. In fact, this is also a board, but slightly different in structure - wood fiber. That is, the source material is subjected to more thorough grinding at the preparation stage.

To understand which of the two varieties of the same type of product is better (chipboard or MDF), you need to understand what their differences are in operational characteristics. This is what determines the specific application of each sample.

Features of materials

All the advantages of the slabs indicated below, as well as a number of disadvantages, are the result of an analysis of reviews and an exchange of opinions on thematic forums. From the author’s point of view, they deserve more trust than information posted on the websites of dealers and manufacturers. At least, you definitely can’t call them custom-made.

Chipboard

The prepared mixture based on wood fractions (shavings, sawdust) and an adhesive composition is subjected to “hot” pressing, that is, simultaneously exposed to high pressure and temperature. And here there is one of the main differences from MDF. Wood particles vary in size and shape. In addition, there is a difference in the proportion of components and the type of glue used. Based on this, all chipboard slabs are divided into groups according to their structure density - low, medium and high. That is, the buyer has a choice according to this criterion.

Samples can consist of one or several layers (up to 5), which also diversifies their assortment.

Depending on the amount of toxic formaldehyde (one of the components of the adhesive) in the initial mixture for chipboard, the boards are divided into categories E0 (minimum percentage, which in practice is not taken into account), E1 (low content) and E2 (increased).

Pros:

  • Large range of products, which allows you to make optimal choice Chipboard.
  • Attractive price. Compared to MDF, with all the same parameters of the boards (dimensions, thickness), it is lower by about 30 - 35%. This is partly due to the fact that there is significant competition in this market segment, and in order to increase sales, manufacturers are forced to reduce the price of chipboard sheets.

Minuses:

  • Toxicity. Perhaps this is an overly harsh definition, but it is clear that formaldehyde is present in almost all adhesives for this type of slab. Consequently, when the resin is heated, harmful fumes are released. The only difference is in their concentration (depending on the category of chipboard and local conditions).
  • "Looseness" of the structure. Even if the chipboard density is maximum (820 kg/m3), repeated installation/dismantling of these boards is not recommended. After several reinstallations, the fasteners in the mounting socket gradually begin to loosen, which sharply reduces the reliability of the assembly. Therefore, for the manufacture of mobile (portable) chipboard designs it is inappropriate to use. As a last resort, for the back walls of various cabinets, racks and the like, where you can drill new holes as much as you like - they will still be hidden from visual view.
  • Difficulty of processing. During the cutting process, especially if the tool is chosen incorrectly, the result is not just a wide cut, but also one with fringe on the edges. Milling and cutting grooves on chipboard is not recommended at all. On your own, without practical skills, achieve High Quality it won't work. This should be taken into account by those who decide to make any piece of furniture from these slabs with their own hands.
  • Low bending strength. Here it is short - even high-density chipboards break quite easily (under certain conditions). Therefore, it should not be used in places exposed to dynamic influences. Only for “stationary” structural elements.

MDF

The manufacturing conditions are in many ways similar to chipboard (hot steam, pressing), but the technology is somewhat different. Wood processing waste is crushed, after which it is also wiped using special equipment. In fact, these are already microscopic fractions, a dusty mass. After drying, it is mixed with an adhesive and pressed. Therefore, there is no need to talk about any layers - MDF boards are homogeneous in their structure and have a high density (790 ± 50).

"Environmentally friendly". In the manufacture of MDF, resins containing toxic components are not used. Everything is only natural (wood fractions + adhesives based on lingin, paraffin or something similar), without “chemistry”.

Accuracy of all linear parameters. Pressing the “dust” makes it possible to almost completely eliminate deviations from the declared size. In addition, the edges and ends of the slabs are smooth, so there is no need to additionally sand the base before further finishing. The result is a partial reduction in installation (assembly) costs and time savings.

Pros:

  • Ease of processing. MDF, unlike chipboard, can be milled, make various cuts, and drill. During the cutting process - an even cut, high accuracy and minimum waste.
  • High strength. The result is the possibility of constructing prefabricated structures. As a material for furniture (taking into account the low cost of production), especially when making it yourself, MDF is one of the best options.
  • Relative plasticity. In this parameter, these boards are superior to chipboard. With slight deformation of the structure, as well as excessive loading of the sample, the MDF will not break, but will only bend slightly (if the thickness is initially selected correctly).
  • Good moisture resistance. If it will not last long in damp rooms, then MDF can be used. Especially if the plate is laminated.

Minuses:

  • Flammability. Both chipboard and MDF, as wood-based materials, are susceptible to combustion. There is no escape from this. But with wood fiber boards you need to be more careful in this regard. They react more strongly to open fire. Therefore, during installation and MDF finishing it cannot be used (in the form gas burners or something similar). For example, when fixing self-adhesive sheets of rolled materials on such a basis.
  • Low impact strength. Despite the certain plasticity of the board, a fallen heavy object leaves a dent on the MDF. It is quite difficult to eliminate such a defect. Therefore for finishing It is better not to use these products on floors.
  • The cost is higher than chipboard. This limits use of MDF in various utility rooms and so on. That is, where appearance does not play a special role, it is better to focus on chipboard of the corresponding category.

Conclusion

Strength

According to the upper limit of this parameter, if we're talking about Regarding loaded structures, there is no significant difference between chipboard and MDF. However, for other purposes (less critical elements), the choice of chipboard is much wider, since the numerical expressions of this characteristic lie in a fairly large range (density value from 350 to 820 kg/m³). And since this directly affects the cost of products, competent calculation and selection of a sample of the required group allows us to talk about the possibility of optimizing costs.

Degree of edge processing

On the one hand, the finer the fractions, the smoother the surface. If we look at it from this point of view, then MDF is better. Although there are modifications of chipboard that are distinguished by their magnificent appearance. They have a designation in the abbreviation (through a dash) from the letters P-A. These slabs are sanded, so they do not need to be further processed before applying varnish or gluing.

"Ecological cleanliness"

Buyers often pay attention to the toxicity of certain building materials, and they do the right thing. This largely determines whether the product is worth using in a residential area or not. In this regard, MDF has an advantage. Such stoves, even at high temperatures (for example, in the kitchen), practically do not emit harmful components. But with chipboard you should be more careful. They are mainly used in the arrangement of various utility rooms or outbuildings (racks in garages, sheds, surface cladding, etc.). For residential - in some cases, and then, products whose labeling contains the designation of category E0 or 1.

It is recommended to organize additional protection from the release of toxins by surface coating (film, paints or anything else). Moreover, all edges of the chipboard slab are processed, including its end parts (especially after cutting the sample).

It remains to add that to reduce the cost of work, it is advisable to resort to a combination of materials. That is, the visible part of the structure should be made of MDF, and the part that is hidden ( back wall, internal partitions compartments and the like) - from chipboard. This is exactly what thrifty “home craftsmen” generally do.

Well, what exactly to choose – chipboard or MDF – should be decided based on the specifics of the application. If we take into account the costs of the slabs, all the nuances of their preparation, installation and the duration of further operation in specific conditions, then we can determine that in this case better, not difficult at all.

The first thing to consider when choosing kitchen furniture is its functionality. But not less important has an attractive appearance. You also need to take into account the price of the furniture. Many people want to get high-quality and beautiful furniture. But which is better: MDF or chipboard for the kitchen?

Material for kitchen facade

The following materials are used for the arrangement:

  • laminated chipboard;
  • tree;
  • frame;
  • aluminum profile.

If everything is clear with wood or aluminum, then the abbreviations LDSP and MDF raise questions for many. These materials are widely used in modern furniture production.

The creation of materials such as laminated chipboard and MDF makes it possible to develop a wide range of products for the home, including the kitchen. Which is better: MDF or chipboard?

The kitchen needs furniture to withstand temperature fluctuations and high humidity. Cabinet doors are constantly subject to mechanical stress and are opened wet hands. Therefore, the facade is usually made of MDF, and side walls and shelves are made of chipboard. This is due to the characteristics of the materials.

and MDF

LDSP is laminated chipboard. It is obtained by pressing sawdust. But first they are treated with formaldehyde resin. Then it is laminated - covered with paper film impregnated with melamine resin. Paraffin or its emulsion makes laminated chipboard waterproof.

The predecessor of chipboard appeared in the 40s of the last century. To finish it, not only lamination is used, but also plastic, veneer, acrylic and even artificial stone.

MDF is obtained by pressing dried chips. Before this, paraffin is added to it. They make the material durable. The sawdust used to produce MDF is very fine. Therefore, the product obtained from it is much stronger and denser. There are not many resins in such products that are harmful to humans. Such a stove appeared in the 60s of the last century.

So which is better, MDF or chipboard for the kitchen?

Advantages of waterproof laminated chipboard

Perhaps its main advantage is the low cost of chipboard. The price of a sheet ranges from 220 to 400 rubles. It depends on the thickness, which can be from 8 to 25 millimeters.

Products made from this material tolerate moisture well and high temperatures, which are often found in the kitchen furniture made of chipboard.

The price also depends on the type of decor.

The color range of LDPS products is quite wide. Often it repeats the colors of wood of different species.

Disadvantages of laminated chipboard

Firstly, it is rigid, due to which it cannot be milled.

Due to the presence of different resins laminated chipboard refers to toxic materials. This indicator depends on what kind of resin was used in its manufacture. The least harmful substances are found in class E1 slabs.

Nevertheless, even countertops are made from laminated chipboard. Laminated chipboards are covered with HPL plastic, which is also called laminate, using postforming technology. Special attention pay attention to the quality of the seams. If it is bad, then moisture gets into the sawdust, the tabletop board swells and loses all its qualities. Laminated chipboard countertops are often not of very high quality.

Advantages of MDF

The material is easy to process using milling tools. The result is a patterned relief surface.

PVC film various colors can give furniture a modern and stylish look. She is not afraid of acids and household chemicals. Various enamels are used for finishing furniture.

Products made from MDF are fire resistant. They do not swell from moisture. We can say that the material’s characteristics are much closer to wood than chipboard. Surface MDF kitchens(gloss) beautiful and original. The use of special effects (mother of pearl, chameleon) makes it possible to obtain beautiful and original products. And if we take into account the availability of all kinds of colors, then manufacturers have ample opportunities to create beautiful and original products for the kitchen.

Disadvantages of MDF

Higher price than products made from chipboard.

The coating may peel off at temperatures above 75 degrees.

Frame facades

Frame facades are used. The frame made of MDF profile is complemented by inserts made of chipboard, metal, and glass. The frame is finished with PVC film or veneer. Their advantage is low price and the ability to create a large number various options design.

Disadvantages - fragility, difficulty in care. The frames are sometimes loosely connected, resulting in a wobbly product.

Processing of product ends

The postforming method is that it is already bent at two ends. Others add a decorative edge after cutting to size.

Most often, all four ends are treated with PVC, acrylic or an aluminum rim. The color of the edging may contrast with the color of the furniture.

The softforming method consists of processing the edges of the workpiece with cutters rounded outward. Decorative film At the cut site they are glued end to end.

MDF with enamel

Very impressive products can be obtained by decorating MDF products with enamel of various colors. First, the surface is primed, painted, dried, and sanded. The next layer is applied, then several more.

After processing the last layer, the surface is varnished. After drying, polish again.

The advantage is beautiful view, the disadvantage is that it is expensive compared to plastic or film coating. Such furniture can fade in the sun, leaving fingerprints on it. The back of the doors is usually white. In addition, mechanical shocks cause chips that cannot be repaired.

What's better

So which is better: MDF or chipboard? For the kitchen, would it be nice to make all the furniture from MDF, and not just the facades? Yes, it would be stronger. But much more expensive. Therefore, this type of configuration is often used.

MDF has more high density. This will not only extend the life of the products, but will also allow you to decorate them with various carved patterns and decorative ornaments.

The furniture created in this way has a beautiful appearance, the facade is indestructible. Of course, this furniture is not as durable as wooden furniture, but with normal care it will serve its owners faithfully for a couple of decades. And during this time, perhaps new technologies will be created that will make it possible to produce more quality furniture. The MDF kitchen gets different reviews. In general, consumers like the appearance, but are not satisfied with the quality of the countertop.

There are certain requirements that must be adhered to when choosing finishing materials for renovating an apartment. An important role here is played by the choice of materials and furniture for the kitchen, since it is the “hot shop” in the apartment.

Usually for finishing furniture facades use MDF or chipboard. These slabs, although externally similar, have significant differences in their composition and the technologies used. This is reflected in their performance. Chipboard or MDF - which is better for making kitchen furniture? What to choose so that the furniture meets environmental standards and lasts as long as possible, maintaining its original attractiveness?

Kitchens made of laminated chipboard/chipboard: characteristics and types of material

Chipboards began to be used for the production of furniture, including kitchen furniture, back in the middle of the last century. The use of this material has made it possible to satisfy the increased need to provide the population with average incomes with affordable and aesthetically attractive furniture.

The basis for the production of chipboard is recyclable materials - sawdust and wood shavings, compressed with the addition of inexpensive glue, so the cost of the final product is quite low. Today, chipboard production is carried out using new technologies, using a variety of finishing materials, which makes it possible to make beautiful and high-quality furniture from slabs.

Chipboard according to their external and quality characteristics are divided into several types:

  • "Naked";
  • Laminated (chipboard);
  • Laminated.

Naked, or chipboard devoid of any coating, is used as a base, topped with plastic, veneer and other coatings, including even artificial stone.

Laminated chipboard obtained by covering the surface with a laminated film of paper impregnated with melamine resin. Thanks to modern technologies, you can create laminated chipboards with imitation natural wood or stone, as well as apply any other design. The film is pressed under pressure onto the surface of the chipboard, giving it resistance to moisture and minor mechanical and thermal influences.

The main difference between laminated chipboard and laminated chipboard lies in lamination technology. Despite the same price, laminated chipboard is inferior to laminated chipboard in terms of service life, since the protective layer begins to peel off very quickly along the edges of the products.

Using chipboard for the kitchen today has its pros and cons, which you need to know about when buying furniture. The undoubted advantages of this material are:

  • Affordable cost of manufactured furniture;
  • Ease and speed of installation;
  • High density of the material, providing sufficient strength for furniture;
  • Resistance of pressed and laminated surfaces to moisture.

Made from chipboard or Kitchen laminated chipboard furniture will not require significant effort and expense, since they can be easily processed without the use of special equipment, and have sufficient density for reliable fixation of hinges and handles with screws.

However, one should not discount the disadvantages that this material has. The most important of them is the use of formaldehyde resins for gluing wood components. According to environmental safety, chipboard can be divided into two types: E1 and E2

Their main difference is that E1 contains a smaller amount of formaldehyde resins, which emit toxic fumes. Therefore, it is preferable to use E1 for the production of kitchen and children's furniture. Making, for example, children's furniture from E2 chipboard is strictly prohibited. Therefore, using it for the kitchen is also undesirable. The most environmentally friendly chipboards made in Germany or Austria.

The second disadvantage, which is also important in the manufacture small parts, is that very hard chipboards are difficult to process. It is impossible to make figured parts from them.

Naked chipboard

Laminated chipboard

Laminated chipboard

MDF kitchens: characteristics, pros and possible cons

MDF boards are made by pressing tiny sawdust with the addition of paraffins, which have water-repellent properties, or lignin for bonding. A kitchen made from MDF has more environmental safety than similar furniture made from chipboard.

Recently, the manufacture of furniture from MDF has become increasingly popular in Europe. This is explained by the advantages that MDF boards undoubtedly have:

  • Environmental Safety;
  • Softness in processing;
  • Long service life;
  • Preservation of the properties of natural wood;
  • Low production costs.

MDF, like chipboard, can be laminated, and this significantly increases its waterproof qualities.

Modern designers They really like to work with MDF; it is easy to process and create beautiful carved or embossed elements for finishing furniture.

New kitchens made from MDF look stylish and look completely indistinguishable from furniture made from natural wood.

The main disadvantage is the lack of a developed production base for MDF manufacturing Therefore, for the Russian consumer, furniture made from MDF is much more expensive than analogues made from other types of boards.

Let's compare what is more suitable for kitchen furniture

Try to compare the main advantages and disadvantages of each material - this will allow you to choose the most suitable option for yourself.

The main requirements that must be met kitchen furniture, This:

  • Environmental cleanliness;
  • Resistant to moisture;
  • Strength;
  • Beautiful surface design;
  • Affordable price.

Let's look at compliance with these requirements in furniture that is assembled from MDF or wood-based analogues.

If you decide to purchase chipboard furniture, you should find out what type of material it is made from. Even for the most budget option You should not risk your health and purchase furniture assembled from environmentally hazardous chipboard of class E2.

If you are guided by considerations of complete environmental friendliness of the material, then it is better to give preference to laminated chipboard or MDF - this way you will be guaranteed against the fact that your furniture in the kitchen will become a source of toxic fumes.

MDF has the greatest moisture resistance, since moisture-resistant materials - lignin and paraffins - are used to glue wood components. Therefore, such furniture will be most resistant to moisture. In second place is laminated chipboard. The water-repellent film covering the surfaces protects the furniture from exposure to water. Chipboards have the worst position - the “bare” board is not suitable for kitchen surfaces, and laminated is not sufficiently protected from moisture penetration due to possible peeling of the protective layer.

When buying furniture for the home, it often comes up not an easy task: what is better to choose - laminated chipboard or MDF. The slabs are very similar in appearance, the products made from them look approximately the same and at first glance there is no obvious difference. Meanwhile, there are very different differences: in terms of placement, durability and safety. And without having an idea about the features of each material, you will not be able to make the best choice.

But everything is not as difficult as it seems. In this article we will tell you how laminated chipboard differs from MDF, about the advantages and disadvantages of the finished product. And also, you will learn what should be taken into account without fail.

And for those who don’t have time to understand all the intricacies furniture production, at the bottom of the page there is a picture hint “Chipboard or MDF: which is better?”. It indicates the main differences between furniture made from these materials and the suitable area of ​​the apartment for placement.

So:

Chipboard and MDF - what is the difference?

laminated chipboard

Laminated particle board, more correctly, of course, it would be chipboard, as industrialists call it, but among the people the name without the letter “t” has stuck. It is produced from waste from the wood processing industry - sawdust, by hot pressing using a formaldehyde-based adhesive resin.

The chipboard is laminated with melamine film and cut into parts. Since the material absorbs moisture well and swells, the ends of the facades are sealed with an edge. This technology allows not only to prevent water from getting inside, but also to reduce the release of formaldehyde vapor to a safe minimum.

Russian GOST, adopted in 2010, obliges compliance with safety standards and allows the use of only laminated chipboards of emission class E1 and E0.5 in the furniture industry. Moreover, this standard allows us to produce chemically safe children's furniture. You can find out more about the current regulations.

Pros and cons of furniture made from chipboard:

  • Obvious advantage- This cheap price final product. Even with a modest budget, you can furnish your apartment quite decently.
  • Flaw- the possibility of moisture getting between the joints of the coating. It is necessary to remove water from problem areas in a timely manner.
  • And one more- the material is most vulnerable at the places where the fittings are attached. It is not advisable to frequently disassemble and reassemble furniture made from laminated chipboard. With constant screwing in and out of screws, the slab crumbles and the holes increase in diameter.
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