Installation and Construction Technology (1) Laying of Gypsum Plaster
1. Fixing method The laying of plasterboard is the key to the fixing of the board. According to the cross section of the keel, the processing of the edge of the decorative panel and the type of the board, it is often divided into three fixing methods.
(1) Gypsum board (including base board and veneer) is screwed to the keel. Most metal keels use self-tapping screws and wooden keels use wood screws.
(2) Adhesive plasterboard (finished panel) to the keel.
(3) The gypsum board (finished panel) is processed into the form of a mouth-seam seam, and the two limbs of the keel are inserted into the blind seams, without needles and glue, and the board is supported by two limbs.
Plain plasterboard and fireproof gypsum plasterboard are base boards, and gypsum plaster decorative sound absorbing boards are veneer boards, which are usually fixed by screws.
2. If the floor board is considered to be used in the design of the cover panel facing treatment, in order to obtain a satisfactory decorative effect, other decorative materials must be used on other surfaces. There are many kinds of finishes in the ceiling project. Commonly used are: wallpaper, latex paint, spray paint, and various types of lenses, such as glass lenses, metal polishing plates, and composite plastic lenses. Among many face-lifting practices, paper wallpapers are devaluated. Wallpaper specifications, variety, color and pattern is quite rich, there are many opportunities for design choices. Because of the great difference in light perception, texture and other aspects of the wallpaper, different artistic styles can be obtained through different choices. In addition, the wallpaper is easy to construct, easy to bond with the grass-roots, and changes with the grass-roots level. Therefore, the paper-based gypsum board is used as the grass-roots board, and the wall paper is used to paste the ceiling, which has its unique advantages and is happy to be used by everyone. Especially in the restaurant ceiling and hotel rooms ceiling, the application is more common.
If you choose to use mirror materials, pay special attention to the fixing of the surface material. In addition to sticking with an adhesive, it is also necessary to use a needle to fasten it or compress it around the bead. If you choose mirror glass, paste safety glass. There may be changes in the method of fixing the materials of different specifications, but in any case, safety and security should be the first.
Common Problems in Construction of Ceilings 1. Uneven ceilings (I) Phenomenon: The ceiling is uneven, inclined, or has partial waves.
(b) Reason: 1. The elevation of the ceiling was not identified, or the line was not clear, and the local elevation was wrong. 2. The ceiling spacing is too large and the keel deforms too much. 3. Wooden keel ceiling wood moisture content, shrinkage deformation. 4. When using wood screws, the distance between the screws and the edge of the gypsum board is inconsistent.
(c) Measures: 1. The water column method is used to find the elevation line around the wall. The bullet line is clear and the position is accurate. 2. Light steel keel boom spacing should be 1200 ~ 1500 mm, not too large. 3. The wood used meets the requirements and is firmly fixed. 4. The distance between the screw and the edge of the board or the end of the board must not be less than 10 mm, nor more than 16 mm. The middle screw of the plate must not be more than 200 mm apart.
Second, the paper plaster ceiling cracks (a) phenomenon: the gypsum board ceiling, after a period of time, gypsum board joints cracks.
(b) Reason: 1. The structure of the slot joints is not reasonable. 2. Gypsum board quality is poor, expansion and contraction deformation. 3. Caulking putty quality is poor. 4. Improper construction measures. 5. Ceiling keel is not fixed.
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How to solve the cracks in plaster ceilings?
answer:
There is a close relationship between cracks on the ceiling of plasterboard and seasons, construction and materials. There are two kinds of problems that are easy to appear on the gypsum plasterboard ceiling. One situation is that about half a year after the ceiling is completed, cracks begin to appear at the joints of the gypsum board. The solution is to make sure that the gypsum board is fixed in the unstressed state when the plasterboard ceiling is in place. The distance between the keel and the fastening screw must be strictly in accordance with the design requirements; care should be taken when the overall scraping putty is used, and the putty should not be too thick. In the second case, irregular ceiling waves appear on the ceiling. The surrounding grille or square corners of the suspended ceiling, or the shrinkage caused by the large moisture content of the wood, can cause uneven crowning. In addition, the keel joint is uneven and has a hard bend. The distance between the hanger or the reinforcement tends to deform the spur keel, and it also causes the ceiling to be uneven. The top of the wooden boom is chapped and it is not tightened when the boom is made of steel, which can cause irregular wave deformation. The lighter steel keel is best used for ceiling projects with large area. To prevent ceiling arching, suspended ceiling timber should be made of high-quality soft wood, its moisture content should be controlled within 12%, the keel should be straight, there can be no transverse penetration through the section of the frugal, ceiling construction should be leveling around the wall on the wall, installed The level of the arching height of the indirect horizontal line shall be 1/200 of the short span of the room, and the vertical crown should be evenly distributed.
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