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Things to note when decorating in summer

Recommendations for summer decoration precautions

Summer decoration precautions

In summer, due to hot weather, high temperatures and excessive dryness, or There is too much rain and too much humidity, so it has never been considered a prime time for decoration. But more and more people are decorating in summer, and they are paying more and more attention to decoration, so Tubatu Decoration Network is here to share with you the eight major things to note when decorating in summer.

Note 1 when decorating in summer: Safety is the most important thing

The weather in summer is dry and hot. The construction materials should pay attention to safety and fire prevention, and try to place them in a ventilated place to avoid safety hazards due to lack of air circulation. In the event of an accident, planning and arrangements for material stacking and construction at the decoration site must be made; in addition, due to the hot weather, construction workers must pay attention to heat stroke prevention to avoid heat stroke.

Note 2 when decorating in summer: Make the material moisture-proof

As the saying goes, the weather in June is like a child’s face, it can change at any time. The same is true for the weather in summer. The sun may be shining brightly just now, but it may rain heavily in the blink of an eye. Therefore, some decoration materials such as wooden boards, gypsum boards, etc. should be protected from moisture during transportation and storage. They should be placed as dry as possible and away from water sources and windows.

Note 3 for summer decoration: Soak ceramic tiles in water

Ceramic tiles will be used in decoration, but because the materials are relatively dry in summer, materials such as ceramic tiles and floor tiles that need to be soaked in water need to be processed for a longer period of time. time to avoid absorbing water from the cement due to the dryness of the tiles during bonding, resulting in weak bonding with the cement, hollowing, and falling off.

Note 4 for summer decoration: Materials and wallpapers should dry naturally in the shade

Because the air is humid during spring decoration, doors and windows will be opened for ventilation and the walls will be blown dry. But summer is different. Because the weather is dry, wallpapers must be soaked in water and glued for paving. Then the windows and doors are opened to allow the wallpapers to lose water quickly and shrink. However, the best way is to let the wallpapers dry naturally in the shade. .

Note 5 for summer decoration: Do not paint on rainy days.

Do not choose to paint wood products on rainy days. Painting on rainy days is not easy to dry and will affect the future effect, so On rainy days, other work can be done first.

Attention 6 when decorating in summer: Pay attention to leaving gaps in wooden floors

When paving solid wood floors in summer, you must be careful and pay attention to the expansion coefficient of the board. If the gap is too large or too small, it will not look good. Affecting the paving effect, if the local gap is too small, expansion due to heat or moisture will cause the board to arch and deform.

Note 7 for summer decoration: Pay attention to after-care maintenance

Before decoration and construction, you must carefully read the instructions for various materials and products, and construct at the temperature and environment mentioned in the instructions to ensure that the chemical Product quality stability. The finished cement floor, 107 rubber floor, or cement roof should be maintained with some water every day for three to five days to prevent cracking, and the aftercare of the house decoration should be done well.

Note 8 for summer decoration: Ventilation

During the house decoration process and after the decoration is completed, it is inevitable that there will be various smells in the room, and most of these smells will affect human health. Therefore, you should pay attention to opening doors and windows for ventilation, placing more green plants such as spider plants, agave, aloe vera, etc., or placing two or three lemons, oranges, bananas, etc. indoors to achieve a quick odor removal effect.

Precautions for summer decoration

Summer has not been considered a prime time for decoration due to hot weather, high temperatures and too dry conditions, or too much rain and too much humidity. But more and more people are decorating in summer, and they are paying more and more attention to decoration, so Tubatu Decoration Network is here to share with you the eight major things to note when decorating in summer.

Attention 1 when decorating in summer: safety is the most important thing

The weather in summer is dry and hot, so the construction materials should pay attention to safety and fire prevention, and try to place them in a ventilated place to avoid safety hazards due to lack of air circulation. In the event of an accident, planning and arrangements for material stacking and construction at the decoration site must be made; in addition, due to the hot weather, construction workers must pay attention to heat stroke prevention to avoid heat stroke.

Note 2 when decorating in summer: Make the material moisture-proof

As the saying goes, the weather in June is like a child’s face, it can change at any time. The same is true for the weather in summer. The sun may be shining brightly just now, but it may rain heavily in the blink of an eye. Therefore, some decoration materials such as wooden boards, gypsum boards, etc. should be protected from moisture during transportation and storage. They should be placed as dry as possible and away from water sources and windows.

Note 3 for summer decoration: Soak ceramic tiles in water

Ceramic tiles will be used for decoration, but because the materials are relatively dry in summer, materials such as ceramic tiles and floor tiles that need to be soaked in water need to be processed for a longer period of time. time to avoid absorbing water from the cement due to drying of the tiles during bonding, resulting in weak bonding with the cement, hollowing, and falling off.

Note four for summer decoration: Materials and wallpapers should dry naturally in the shade

Because the air is humid during spring decoration, doors and windows will be opened for ventilation and the walls will be blown dry.

But summer is different. Because the weather is dry, wallpapers must be soaked in water and glued for paving. Then the windows and doors are opened to allow the wallpapers to lose water quickly and shrink. However, the best way is to let the wallpapers dry naturally in the shade. .

Note 5 for summer decoration: Do not paint on rainy days.

Do not choose to paint wood products on rainy days. Painting on rainy days is not easy to dry and will affect the future effect, so On rainy days, other work can be done first.

Attention 6 when decorating in summer: Pay attention to leaving gaps in wooden floors

When paving solid wood floors in summer, you must be careful and pay attention to the expansion coefficient of the board. The gaps are not good-looking if they are too large or too small. Affecting the paving effect, if the local gap is too small, expansion due to heat or moisture will cause the board to arch and deform.

Note 7 for summer decoration: Pay attention to after-care maintenance

Before decoration and construction, you must carefully read the instructions for various materials and products, and construct at the temperature and environment mentioned in the instructions to ensure that the chemical Product quality stability. The finished cement floor, 107 rubber floor, or cement roof should be maintained with some water every day for three to five days to prevent cracking, and the aftercare of the house decoration should be done well.

Note 8 for summer decoration: Ventilation

During the house decoration process and after the decoration is completed, it is inevitable that there will be various smells in the room, and most of these smells will affect human health. Therefore, you should pay attention to opening doors and windows for ventilation, placing more green plants such as spider plants, agave, aloe vera, etc., or placing two or three lemons, oranges, bananas, etc. indoors to achieve a quick odor removal effect.

Quickly answer 20 questions about summer decoration details

Entering summer, whether it is necessary to decorate or not, due to climate change, various minor problems may occur in the house. In fact, some seemingly inconspicuous little living habits also affect the quality of house decoration.

Some problems may seem simple, but they just reflect that there are problems inside the house, which may need to be repaired. During this process, consumers should not take things for granted or act according to their own will. If they have any questions, it is best to consult professionals to ensure that they save trouble and worry.

1

Q: The weather is sometimes humid in summer. Do I need to keep the doors and windows open at all times for ventilation during decoration?

Beijing has two extreme weather phenomena: humid and dry in summer. It is necessary to ensure the humidity of the house during ventilation, so it is most appropriate to open windows in the morning and evening.

 2

Q: I have a new air conditioner installed at home. Do I have to "pull the wire" from the meter box again?

In summer, there are many electrical appliances used at home, and the wires must have strong load capacity. If the cross-sectional area of ​​the wires in this room is more than 4 square millimeters, you can connect the wires from the wall and use them directly; if it is not enough, you need to pull the wires from the meter box.

 3

Q: Water is always leaking out of the shower room at home, and the base has been resealed many times but it doesn’t work. How should I repair it?

Be sure to keep the ground dry before pasting the sealing strip. After pasting the sealing strip, it is best to apply a layer of glass glue to ensure it is stronger.

 4

Q: There is water seeping from a floor in the bathroom at home. What could be the problem?

It is possible that there is "trachoma" in the water pipes under the ground. It is recommended to turn off the water pipes and see if the water meter is reading. If it’s wrong, then there must be a water pipe leak in the house.

 5

Q: The temperature is high in summer and harmful substances in building materials are emitted quickly. Is it better to keep the windows open all day long?

There are many thunderstorms in summer. It is best to ensure that there are people at home when opening the windows, otherwise the building materials and furniture will get wet.

 6

Q: The bathroom wall tiles are hollow and the gaps are getting bigger. What should I do?

It may be caused by the dry air in summer. You can remove the tiles first to prevent them from falling off on their own, and then paste them after watering.

8

Q: The environmental protection of decoration materials is very important. When purchasing paint and other products, how to judge whether they are environmentally friendly?

First of all, check whether there is a nationally recognized test report, and also whether the date of the report, product batch and other information are consistent with the product.

7

Q: It is said that decoration companies have many and strong discounts in summer, is this true?

Summer is the off-season for decoration companies, and there will be more activities. In fact, there is not much difference between each business.

9

Q: It is relatively humid in summer, and there is a musty smell in the house. How to get rid of it?

The musty smell may come from the walls and some old furniture. It is recommended to place some lemons or tea leaves in cabinets and boxes.

10

Q: During summer decoration, we should pay attention to the environmental protection of materials. Which is more environmentally friendly, oil-based paint or water-based paint?

Water-based paint emits relatively less harmful substances, but water-based paint is applied more frequently and the effect is not as bright as oil-based paint.

11

Q: The indoor temperature is too high in summer. Can I install air conditioning first and then decorate?

No, generally the air conditioner is installed after painting is completed, otherwise paint will drip onto the electrical appliances, and the paint on the back of the wall-mounted air conditioner cannot be painted, and the air conditioner will easily inhale a large amount of dust.

12

Q: When decorating in the summer, which locations on the construction site should be inspected?

Focus on oil work, including painting walls and wood. Especially when painting, you should observe whether the previous coat of paint is completely dry to prevent problems during the rush period.

13

Q: When decorating in summer, what materials should you pay more attention to when purchasing and storing them?

Wood products include wooden doors, large core boards, cabinets, furniture, etc.; there are also building materials such as paint, coatings, and cement that are sensitive to sunlight and moisture.

14

Q: What should I pay attention to when using air conditioners in summer?

Some electrical appliances that are only turned on in summer, especially air conditioners, need to be dusted and cleaned before use, and check whether the pipes are normal, otherwise they will easily pollute the air in your home.

15

Q: Is there any way to prevent the breeding of mosquitoes and cockroaches when decorating kitchens, bathrooms and other spaces?

Be careful not to have dead corners where water accumulates in these rooms. Make slopes on floors and sinks, and avoid gaps in walls and tiles to prevent mosquitoes from settling in.

16

Q: Our house is an old house. This summer, some cracks and bumps appeared on the wall. How to deal with it?

It should be removed with a shovel and smoothed with putty. After drying, it should be smoothed with sandpaper. It is best to use water-resistant putty when dealing with large areas. For small areas, gypsum powder and white latex can be used to repair seams.

17

Q: The room is waiting for check-in, can I not install some unused things?

Home decoration projects are "non-repeatable". For example, the heater will not be used in summer, but whenever you decorate, you must take the replacement of the heater into consideration.

18

Q: How to deal with mold on the wooden door of the bathroom?

When summer is humid, protective wax or special cleaner should be applied to the surface of the wooden door. It is best to apply tung oil or paint.

19

Q: If the wall paint changes color or even falls off, what should I do?

Use a razor blade to scrape off the peeling paint, then sand it with sandpaper. If the thickness does not change much, just repaint it with good quality paint; if it becomes much thinner, apply putty first and then repaint it.

 20

Q: There is mold on the walls of the bathroom. How should I deal with it?

Wipe with bleach until the mildew disappears; if the mildew reappears and is very serious, it should be caused by failure to deal with it during decoration, and the wall should be re-processed, especially waterproofing.

■ Experiencers say

Adequate time can avoid problems

●Ding Sanbao, deputy general manager of Kuoda Decoration Beijing Branch

There are pros and cons to summer decorating. However, through formal and meticulous construction procedures, decoration problems can be solved and avoided. Generally speaking, summer decoration is a construction period issue. As long as there is sufficient time, any problems can be avoided. Take the treatment of the base layer of the wall as an example. Waiting for it to be completely dry before applying paint may take up to half a month to avoid future problems. Consumers need to understand that workers should not be fooled by supervisors simply because they are rushing work.

Circuit design must be done before decoration

●Mr. Han, lawyer

Circuit design must be done before decoration. Our house was installed early, and we used few electrical appliances at that time, so we didn’t think much about it. In the past few years, a lot of electrical appliances have been added to the home, and they are used a lot in the summer, including air conditioners, dishwashers, and ovens. The original circuit load capacity was too poor, so I had to pull wires from the meter box or use a power strip. The stretched wires are exposed on the wall, which is very ugly and unsafe. Consumers should be aware of this.

Go to the site more often to find problems

●Mr. Liu, employee of an IT company

If time permits, it is recommended to go to the site more often. It’s not that I don’t trust the workers. If I move around the site more, I can avoid a lot of problems. For example, it was a rainy day during the renovation. After I went to see it, I found that the windows were not installed well and there was some water leakage. The manufacturer sent people to rework the windows to avoid future problems. If you have the time and energy, it is best to buy building materials yourself to ensure low prices, good quality and high environmental performance.

Beware of paint turning into "explosives" when decorating in summer

The fire department issued a warning saying that the high temperatures in summer are extremely hot, and there are many flammable and explosive materials used in decoration, especially in high-temperature environments. paint, there is a risk of explosion at any time.

According to fire experts who have participated in relevant fire investigations, due to the high temperature in summer, paint is more likely to volatilize into the air. As the indoor temperature continues to rise, the concentration of oil vapor in the decoration room also increases. During the decoration process, the hammers and grinding wheels used by workers will produce small sparks due to friction. If they encounter high concentrations of oil vapor in the air and accumulate a large amount of xylene, an explosion will naturally occur.

According to experts, the following issues should be paid attention to during decoration construction in hot weather in summer: First, the operation must be standardized, the construction environment should be kept ventilated, and the indoor temperature should be avoided to be too high and the construction time to be too long, resulting in excessive accumulation of indoor air. Multiple xylene gases may explode; second, construction projects must be clearly defined to avoid mixing operations. Workers who paint should not work together with carpentry or electrical work to avoid sparks during the construction process; third, the materials should be classified, and wood, coatings, paints, etc. should be placed separately; fourth, no smoking while working, and no throwing away anywhere Cigarette butts; fifth, fire extinguishers should be prepared at the construction site.

The details of bathroom decoration are most easily overlooked. Be alert to potential safety hazards.

The bathroom space has high quality requirements for floor tiles and wall tiles. The bathroom space has very high waterproofing requirements, so high-quality waterproof wall tiles and floor tiles should be used to reduce the amount of water absorbed by the tiles.

When laying floor tiles, a 1% drainage slope should be maintained, with the slope facing the falling surface. The waterproofing, construction technology and material selection of the bathroom space are equally important. The joints of the floor tiles should be of the same thickness and aligned with the joints of the wall tiles. They should be flat when installing ceramic tiles so that the water in the bathroom space can be drained as quickly as possible. Before the construction of wall tiles, the wall waterproofing treatment project must be carried out first to ensure that the wall is waterproof.

The installation of bathroom appliances should be user-friendly

Try to store the supplies required for different bathing stages in separate wet and dry order, and keep them within easy reach during bathing. When selecting and installing bathroom appliances, consider the humanity of their design. Smooth curves can reduce damage caused by collisions. If the space is relatively large, you can also consider separating the shower space from the makeup and toilet spaces to effectively prevent water splashing and keep the floor dry. These can be fitted with fixed fully enclosed partition doors or with partial shading.

Small safety details are most easily overlooked

Electrical switches should be placed outside the bathroom as much as possible, and the wiring in the bathroom space must be sealed, waterproof and insulated. If there is a socket in the bathroom, keep it away from the water source. It is best to cover it, and remember not to pull out the socket with wet hands.

Pay special attention to safety when installing and using water heaters. Not only the safety performance of the water heater itself will affect the safety of the bathroom, but the ventilation capacity of the bathroom space is also very important. If the window ventilation capacity is limited, you can install an exhaust fan with a retrograde gate, or you can leave a larger gap between the bathroom door and the floor.

The shower room actually "exploded". There are many hidden dangers in decoration. You need to be cautious when using it.

For home decoration, you need to consider its practicality, convenience and comfort, but what needs to be considered more is safety. . When we strive for the beauty of our home, we must first strictly control safety. Behind the carefully built new home, we must not bury safety hazards. How to integrate safety throughout the entire process of design, material selection and construction of home decoration? How to avoid hidden dangers in a room that has been decorated with a brand new look? Renovation is not just an ordinary process, we can do more!

A Repeated lifting and lowering, frequent rotation

You need to get rid of these habits of lifting chairs

Not long ago, Xiaoxue (pseudonym), a 24-year-old woman from Xiamen, was doing her usual business Dry your hair while sitting on a rotating lift chair at home. However, something unexpected happened: after a loud noise, the rotating lift chair suddenly exploded, and the screws and gaskets that flew away from the chair were injected into Xiaoxue's body, causing blood to flow from her buttocks; in Nanjing, a young man was sitting on When he was turning around on the lift chair, the lift chair suddenly lifted up and overturned the young man. Fortunately, there was no danger...

Frequent incidents of injuries caused by lift chairs have aroused people's attention to the safety of lift chairs. Due to its huge lethality, some netizens called the lift chair "the latest cruel artifact." Is the lift chair you sit on safe? This has also become a question that many readers are concerned about.

Market survey

Most lift chairs have certificates

In response to these problems, the reporter visited a number of home furnishing shopping malls in the Changchun market and found that many stores have lifting chairs. Chairs are for sale, with prices ranging from a few hundred yuan to several thousand yuan. In a certain store, the reporter saw a backrest lift chair. The store asked for a price of 1,280 yuan. When the reporter asked about the place of production, the salesperson replied that it was made in Guangdong. The reporter observed that the lift chair also had a certificate of certification, factory name, phone number, and URL, etc.

According to Xu Chongbo, general manager of Eurasian Store Highlight Office Furniture: "Generally speaking, in order to ensure the rights of consumers, responsible dealers will strictly control the purchase from the source to ensure that all products have quality inspection Reports and consumers can also log in to the manufacturer's website to view product-related information when purchasing."

Expert explanation

Why does a lift chair become a "bomb"

Why does a seemingly ordinary lift chair explode?

The reporter searched for relevant information and asked industry experts, and learned that the problem occurred on the air pressure rod. The air pressure rod of the lift chair is shaped like a pump, and the height of the lift chair is controlled by adjusting the air valve.

Generally speaking, a gas pressure rod may explode under three circumstances.

First, the purity of the nitrogen in the pneumatic rod is not enough. For example, if it is mixed with oxygen or other substances, it may explode in a high temperature environment or under frequent friction. Second, the container wall of the pneumatic rod is not strong enough and the material is poor. It may also cause an explosion; the third situation is that the seal is not tightly sealed, causing gas to burst out.

How to use

Do not rotate the lift frequently

News of lift chair explosions often occur in other places. Are there any in Changchun? The reporter learned from the Changchun Consumer Association that there have been no complaints about lift chair explosions. Many experts also said that the probability of lift chair explosions is very small, so there is no need to panic.

It is worth noting that although the probability of a lift chair exploding is very small, it is not recommended to buy a particularly cheap lift chair. When purchasing, consumers should also pay attention to purchasing regular and qualified products, and pay attention to whether they are marked with manufacturer, certificate, quality inspection report, or installation instructions and other certifications.

In addition, when consumers use the lift chair, they must not repeatedly lift or rotate it. The heat generated by repeated friction may also cause an explosion. Once a problem occurs, never disassemble it by yourself, be sure to find a professional to repair it.

B Shower room, bathroom heater

Pay attention to the selection and installation

Nowadays, people are beginning to pursue personality and fashion when decorating bathrooms. However, in recent years, accidents such as defective shower rooms and self-explosion of bathroom heaters have occurred frequently, making people who originally pursued romance begin to worry about whether their bathrooms are safe?

Choosing the wrong shower room is very hurtful

“There are elderly people and children at home. For convenience, during the renovation, a relatively moderately priced shower room was installed in the originally small space. Once My father just entered the shower room, and the shower room exploded for some reason, almost injuring his father. It was very scary to think about it," reader Ms. Huang told this reporter.

According to Manager Li, who specializes in selling shower rooms in Sun City, people's living conditions have improved now, and they will consider comfort, fashion and other aspects when decorating, and install shower rooms in spaces that are not originally very open. However, in recent years, many businesses have seen that shower rooms have brought such convenience to consumers and have begun to seize the market cake. Driven by profit, many defective products flooded into the market. The quality of each component of a defective shower room is far inferior to that of high-quality products. For example, the shower room and bathroom cabinet are simply put together with a few pieces of wood. It is simply made by a few craftsmen. The glass and aluminum plates are also purchased at a low price and then assembled with screws. The product came out in a flash, and the quality was naturally not up to par.

Consumers should not buy shower glass products in the small building materials market. Most high-quality shower rooms use fully tempered glass, while shower rooms made of ordinary glass are affected by external factors, such as hot water in winter. , bursting may occur. When choosing a shower room, you can knock the glass with your knuckles. The sound of tempered glass is crisper, while the sound of ordinary glass is dull. It also depends on whether the glass has 3C safety certification.

Improper installation of bathroom heaters can lead to hidden dangers

“I pay more attention to the safety issues when decorating the bathroom, so the bathroom heater I chose is a very well-known brand in the market. However, four bathroom heaters were installed during one shower heating. One of the light bulbs exploded and the other three were burned out. The manufacturer’s after-sales personnel checked and said that the quality of the product was absolutely acceptable and it was just caused by improper installation!” Ms. Zheng, who lives in Huada Tianlang International, told reporters.

The reporter found that there are many brands of bathroom heaters on the market today, and their features are also diverse, which makes the purchase difficult. Because the production of bathroom heaters is simple and easy to imitate, many small workshops have emerged. These small factories lack understanding of standards, and some even do not understand or have no standards at all. They directly purchase parts of the appliances from outside for assembly. After assembly, the products flow directly into the market. Therefore, when consumers purchase, they must choose carefully and choose products from big brands.

General Manager Xue of Changchun Aopu Bath Heater said that even if the product passes the standard, it still needs to be installed by professionals. Serious installation errors may cause burn-in. The switch of the bathroom heater may leak electricity after being heated, and the switch contacts are also prone to rust and oxidation. Therefore, the switch should be fixed on the wall to prevent the power cord from bearing tension. The fixed position should be able to effectively prevent water splashing. Generally, bathroom heaters require that the connecting lines can withstand a load of more than 10A. Consumers must consider this carefully, otherwise it will easily cause safety hazards. In addition, the safety of the bathroom heater connection line lies in the insulation at the power interface. If the insulation is not good, it is easy to cause leakage, which may cause fire or electric shock. If you use open wire to install the bathroom heater, and the switch box of the bathroom heater is not installed in the wall, the sealing of the switch box is relatively not very good. When you touch the switch box with wet hands or water enters the switch box, it may cause leakage. , consumers must pay attention.

C Glass, mirror, natural stone

These decoration materials cannot be used casually

Glass, mirror, natural stone... these are often used in model rooms Various decorative materials have also been "moved" into their homes by many owners. Indeed, these decorative materials can bring unexpected special effects and beauty, but if used improperly, they will be counterproductive and even cause harm to the human body. Industry insiders suggest that these materials can be appropriately embellished in appropriate places.

Glass wall

Please use with caution if you have elderly people or children at home

Common decorative glass on the market has good permeability, many styles and decorative properties. However, Yuanzhou decoration designer Lu Sicheng suggested that if there are children or elderly people at home, they should use glass walls with caution, because once the light is not strong, the elderly will have poor vision in darker areas. , children will not pay enough attention, there will be dangers, and no matter how strong the glass is, if it breaks, it will hurt the body of the family. This kind of material can be used as a semi-transparent partition between the bathroom and other spaces; it can also be placed in the study room to create a visual extension effect. However, during installation, tempered glass must be used and protected by rubber pads to provide a buffer even in the event of a collision.

Mirror

It is best not to use it on a large area

Mirror is frequently used in interior decoration. Its advantage is that it has the visual effect of expanding the space and can also serve as a Mirrors make the room look more sophisticated and stylish. Zhang Lei, manager of Baihe Decoration Engineering Department, told reporters that it is best not to use mirrors for decoration in large areas. You can consider setting them in wardrobes or other places that can be blocked. In addition, when using mirrors, lighting issues must also be considered. Improper use will cause visual confusion and "visual pollution". This type of material is more suitable for small apartments, such as on the walls and ceilings of corridors, sofa background walls, etc.

Natural stone

Radioactive materials must be paved appropriately

Yu Lei, manager of Yuanzhou Decoration Engineering Department, said that because natural stone is taken from nature, it will definitely It contains radioactive substances, mainly "radon" gas. If used too much or in inappropriate areas, it will harm the health of your family. So how should natural stone be used? Yu Lei said that first of all, purchase through formal channels, sign a legally valid contract, and be aware of rights protection; secondly, do not use such materials in bedrooms, elderly people and children's rooms, as these groups have low resistance; thirdly, After laying marble in a large area, the owner can first ask professionals to conduct testing. After passing the test, open the doors and windows for 20 to 40 minutes every day for about 5 days, and the "radon" content in the stone will weaken.