Gypsum board ceiling is a common decoration in the home. It not only helps you to block the various pipes on the top of the head, it is easy to install spotlights, but also makes your room more layered. Today we will talk about the precautions for the gypsum board ceiling.
At present, most of the ceilings in home decoration are keel structures. In order to ensure your safety, the specifications of the keel should be strictly selected and should not be too small. The materials of the keel are mainly wood and light steel, but because the wood is easily deformed by moisture, the life is short, and the fire performance is poor, it is rarely used in home decoration. We still recommend that you choose a light steel keel, and the construction steps in the back are also for the light steel keel.
The ceiling can't have a strong skeleton, but also has bright flesh. Some decoration companies recommend that the owner use the large core board as the ceiling main material, but you better not agree. Although the large core board is very cheap, it contains a large amount of glue, which will release harmful gases such as formaldehyde and benzene, causing indoor pollution. Don't hurt your body to save this money~
We recommend that you use plasterboard to make shaped or flat ceilings in the living room, entrance hall, corridor, etc., so that it is more environmentally friendly.
Classification of gypsum board
Gypsum board is a kind of new type of ceiling decoration material which is widely used at present. It is not only light, moisture-proof, flame-retardant, not easy to deform, and has good processing performance. It can be sawed, nailed, planed, and bonded. It is very convenient for construction and sound absorption. The performance is also great and the price is cheaper. Do you think that its price/performance ratio is particularly high?
The more commonly used gypsum boards are decorative gypsum board and gypsum board.
Decorative gypsum board is also divided into many varieties, including flat plate, pattern embossed plate, semi-perforated plate, full perforated plate, waterproof plate and so on. The embossed plate is suitable for the living room, bedroom and study ceiling of the living room; the waterproof board is mostly used in places with high humidity such as kitchen and bathroom.
Such a patterned gypsum shape is factory-cast, and is often used for ceiling decoration in porch, living room, etc., and the cost is relatively expensive. Ordinary home decoration is used very little.
Generally speaking, the ordinary people use more paperboard plasterboard as shown below. It is a kind of lightweight board made of gypsum slurry as the core and two sides with paper as the cover.
The color of the paper on the plasterboard is different, which means that its function is different.
Wearing a gray coat is a civilian, there is no special ability; wearing a red coat is a refractory board, it can hold the fire, blocking the spread of fire; wearing a green coat is a moisture-proof board, it can hold the moisture, even in the southern plum rain The season will not be deformed.
If your family has special needs, just call them!
In addition, the thickness of the gypsum board should not be too thin. The 9mm plain gypsum board is not strong enough to be easily deformed in a humid environment. We recommend that you use a gypsum board of 12mm or more. The gypsum board is thicker to prevent joint cracking~
However, the quality of the paper gypsum board in the decoration market is not good, you still try to choose the products of the big factory, so as not to crack the ceiling.
Gypsum board selection method
Now that we have talked about the quality of gypsum board, we will teach you a few ways to choose a gypsum board:
(1) look at the surface
When you are picking a plasterboard, look for a well-lit area and take a closer look. The surface of a good gypsum board should be smooth and smooth, and there should be no defects such as pores, stains, cracks, corners, uneven colors and incomplete patterns. The side of the gypsum board can not be ignored, can be seen whether the gypsum texture is dense, there is no empty drum phenomenon. The harder the gypsum board, the more durable it is, and the empty gypsum board is not to be bought.
The two layers of kraft paper on the gypsum board must be bonded, otherwise the gypsum board will be easily cracked when the screws are screwed. If the merchant allows, you can try to tear it off. It takes a long time to tear off a small corner and it is a good product.
(2) Listening to the sound
Gently tap the gypsum board with your finger. If the sound is boring, it means it is very durable. If it emits a very empty sound, it means that there is an empty drum in the board and the texture is not good. The tap is to check the elasticity of the plasterboard, but it is not to prove that you can cut it into eight pieces in one palm, don't be violent.
The weight of the handcuff can also be used to measure the quality of the gypsum board. The same size of the board, the weight of the quality is better.
(3) Quantity deviation
The dimensional tolerance, flatness and right angle deviation of the gypsum board are to comply with the product qualification standards. If the deviation of the decorative plasterboard is too large, the seams of the ceiling will be misaligned, and the entire surface will be uneven, which will lower the value of your home. We install the ceiling for beauty, and the ugly plasterboard walks away!
(4) Look at the sign
Each package of gypsum board should have the name, trademark, quality grade, manufacturer's name, date of manufacture, as well as moisture, care and product marking. When you buy, you should focus on the quality level mark. The quality grade of the decorative plasterboard is divided according to the dimensional tolerance, flatness and right angle deviation. The higher the grade, the more accurate the size.
Ceiling installation process
With good materials, there must be good craftsmanship, otherwise the gypsum board piled up in the house, and it is not beautiful. In addition, the ceiling is a concealed project. If the construction process is not intensive, and the gypsum board is good, it is not easy to find the problem. Therefore, everyone must have a little understanding of the installation process of the ceiling, in order to do a good job.
The process of most ceiling installation is as follows: measuring the payout → fixing the boom → installing the side keel → installing the main keel → installing the secondary keel → installing the decorative panel → installing the closing strip
1. Measuring the payoff:
If you want to draw a picture, you have to draft a draft. Of course, the important work of the ceiling is to mark the position in advance. Otherwise, what should I do if the ceiling is installed? Workers generally use a laser level tester to measure the overall horizontal and vertical lines in the room, giving the ceiling a clear reference.
However, the level can not be opened during the construction process. The worker should also use the ink line to eject the ceiling elevation control line along the wall or column according to the instructions of the instrument. The height of the ceiling should be flush with this line, so that the whole will be completed after completion. Neat, not sloppy.
2. Fixed boom
The boom is the primary component to withstand the weight of the ceiling. The boom is not fixed. Do you still expect the ceiling to be secure? Hey? You don't know which boom is it? Looking at the picture below, the thin, long pole that is perpendicular to the plane of the ceiling is the boom.
The boom with the light steel keel is an expansion bolt, which is vertically rooted on the ceiling to fix the boom. The other end is a bolt with a bolt for fixing the keel. The distance between the sling and the expansion bolt can be adjusted. When installing, ensure that the height of the metal piece is consistent, so that the keel level can be made.
3. Keel installation
The keel installation is the highlight of the ceiling work, which is divided into four steps:
(1) Mounting keel
As the first keel to play, the height of the keel is fixed, and the height of the ceiling is fixed. Therefore, when installing the side keel, it must be parallel with the raised ceiling elevation control line, otherwise the ceiling will be awkward. Of course, the side keel often has its own horizontal line. The side keel is usually double-fixed, glued once, and the nail is nailed again, so that it is secure.
In addition, the spacing of the keel nails should not be greater than the spacing of the ceiling keels, generally 300 to 600 mm, otherwise deformation may occur, affecting the stability and quality of the final project. Everyone has to keep an eye on it~
(2) Install the main keel
The keel that is continuous with the boom is the main keel, and the center of the boom should be on the centerline of the main keel. The installation distance of the main keel is generally 900-1000mm, and it is generally preferred to arrange the parallel direction of the room. In other words, the main keel is longer than the second keel. The longest one in the picture below is the main keel.
(3) Install the secondary keel
The metal secondary keel is fixed with nails and special connectors and main keel.
The secondary keel and the side keel must be docked and must not be overlapped. That is to say, the height of the secondary keel should be consistent with the side keel.
In general, the spacing of the secondary keels should not be greater than 600mm. If your room is wet, or if the ceiling you are installing is important, the keel spacing should be smaller, preferably between 300 and 400 mm.
(4) Calibration and inspection
After the keel is installed, you can't rush to decorate the panel. You must first adjust the flatness of the keel to make sure the keel is installed securely. Otherwise, after all the equipment is installed, I found a problem. If I want to repair it, it will be too tossing~
The standard for keel leveling is: the level of each keel, there is no hard bend at the joint, the force point is tightly combined, and there is no arching.
After leveling, you also need to shake the keel up and down by hand. If there is no rocking instability, then its stability is in line with the standard.
4. An decorative panel
The size of the gypsum board should match the distance between the keels. If the gypsum board is too large, it needs to be cut first. For large-area sheet cutting, a panel saw can be used, and a small-area sheet cutting can be used to directly move the knife. When cutting, the angle should be controlled. The burrs and creases of the incisions should be straightened, otherwise the plates and plates can not be sturdy together. Under normal circumstances, the long side of the whole gypsum board should be consistent with the direction of the secondary keel.
The gypsum veneer and the light steel keel are generally fixed with a countersunk head tapping screw.
The gypsum board is nailed to the side keel and the secondary keel. The fixing should be noted: each board should be fixed radially from the middle to the periphery, and it cannot be fixed at the same time from multiple points around. In this way, the gypsum board will be very flat, and there will be no such phenomena as curved edges and convex drums. When using a self-tapping screw to lay the gypsum board, the nail pitch should be 150-170mm, and the screw should be perpendicular to the board surface.
When decorating the panel, try to use the whole board as much as possible, otherwise there will be more seams, and it will be easy to crack along the gap in later use. Everyone has to keep an eye on the workers, don't let him cut the plasterboard of your home.
The ceiling as shown above is nail-hole and seam, which can be quite unsightly, so beautify it and scrape a layer of putty to become neat and neat.
Remove dust from the surface of the plasterboard before scraping the putty. The nail holes of the ceiling should be painted with anti-rust paint and smoothed with caulking plaster. The joints should be flattened with caulking gypsum; after the gypsum is dried, it will be flattened with kraft paper strips to prevent cracking.
After all these work is done, you can put the putty on the plasterboard. The beautiful ceiling you are looking forward to finally appears!
There are also some light ceilings that do not have a main keel installed, and accordingly no boom. However, such a ceiling can only be used in small places such as corridors or corners of rooms. If the whole house is a suspended ceiling, the main keel and the boom are still necessary.
Ceiling construction precautions
In order to ensure that your home's ceiling is beautiful and strong, you have to pay attention to the following things during the construction process:
1. When installing gypsum board in the rainy season, the humidity of the working environment should be controlled as much as possible below 70%; the transportation, handling and storage of various ceiling materials should be taken to prevent rain and moisture. Otherwise, the material is prone to mildew, rust, deformation and the like.
2. The veneer should be inspected one by one before installation. The corners must be regular and the dimensions should be the same. This way, the seams can be smooth and smooth, and the ceiling value is high.
3. Light steel skeletons often reserve a variety of holes, such as lamp openings and vents. The keels and connectors should be placed at these holes in accordance with the construction specifications and atlas requirements to avoid deformation and cracks around the holes.
4. The keel should be fixed directly on the ceiling and wall, and should not be hung on the pipeline or equipment. After the lifting parts are adjusted, they must be fixed and tightened. The connection between the light steel frames must be firm and reliable to avoid deformation of the skeleton, resulting in uneven or even cracking of the top plate.
The ceiling part is introduced so much, I wish you a smooth decoration!