The difference between painting and scraping the interior wall of home improvement, after the on-site engineering quantity is determined, there is no difference between scraping and painting, and the surface of wall brick needs mortar flour brush.

"Scratching" is a term in architectural decoration and wall plastering construction. Some places are called "finding the bottom" and some places are called "filing". It is the process of leveling and finding rules in the construction of wall painting project. At this time, the sand content of the mortar used is slightly higher than that of the surface mortar, so as to prevent shrinkage cracks from easily occurring after the wall absorbs water. Before the basic operation of "scraping", clean the wall, water it one day in advance, wash the floating ash on the wall and let the dry wall wet. Only when there is no clear water on the wall can the next process be carried out. And be careful not to wet the water too much, which will affect the quality and speed of scraping operation. Scraping will also use plain cement slurry (in some cases, it will be required to add an appropriate proportion of rubber compound), and all the walls will be brushed together to ensure the bonding strength between the scraping materials and the walls. The process of napping itself is to find the right standard, and use the level, hanging ball and hanging board to collapse the wood strips. Generally, nail a steel nail at one meter and five places on the left and right, so that the outer plane of the steel nail is in the standard position to be found, and then put a small cake around the steel nail with cement mortar until it is flush with the steel nail with standard, which is called "collapsed battens", and then connect the battens. The whole thing is to scrape it flat and make it rough. So it's called "scraping".

The outer wall also needs scraping.

General plastering engineering

4.2. 1 This section is applicable to the quality acceptance of general plastering works such as lime mortar, cement mortar, cement mixed mortar, polymer cement mortar and hemp knife lime, paper reinforced lime and gypsum ash. General plastering engineering is divided into ordinary plastering and advanced plastering. When the design has no requirements, it shall be accepted as ordinary plastering.

Description:

4.2. 1 This specification divides the general plastering works in the original standard into three levels: ordinary plastering, intermediate plastering and advanced plastering, and merges them into two levels, mainly because the main processes and surface quality of ordinary plastering and intermediate plastering are basically the same, and the main processes and surface quality of the original intermediate plastering are regarded as the requirements of ordinary plastering. The plastering grade shall be determined by the design unit according to the relevant provisions of the state, technical and economic conditions and the need for beautiful decoration, and shall be indicated in the construction drawing.

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Leading project

4.2.2 Before plastering, the dust, dirt and oil stains on the surface of the grass-roots unit should be removed and moistened with water.

Inspection method: check the construction records.

4.2.3 The variety and performance of general plastering materials should meet the design requirements. The setting time and stability of cement should be rechecked. The mixture ratio of mortar should meet the design requirements.

Inspection method: check the product certificate, entry acceptance record, re-inspection report and construction record.

Description:

4.2.3 Material quality is the basis to ensure the quality of plastering engineering. Therefore, the materials used in plastering engineering, such as cement, sand, lime putty, gypsum, organic polymer, etc., should meet the design requirements and the provisions of the current national product standards, and should have the factory certificate; On-site acceptance shall be conducted when materials enter the site. Unqualified materials shall not be used in plastering works. Some properties of the main materials that affect the quality and safety of plastering engineering, such as the setting time and stability of cement, should be sampled on site for re-inspection.

4.2.4 Plastering works shall be carried out in layers. When the total plastering thickness is greater than or equal to 35 mm, strengthening measures should be taken. When plastering the joint surface of different materials, strengthening measures should be taken to prevent cracking. When steel mesh is used, the lap width of steel mesh and each matrix should not be less than100 mm.

Inspection method: Check the acceptance records and construction records of concealed works.

Description:

4.2.4 When the plastering thickness is too large, it is easy to cause quality problems such as bulging and falling off; At the junction of different materials, the plastering layer on the joint surface is easy to crack due to inconsistent water absorption and shrinkage. In this case, strengthening measures should be taken to ensure the quality of plastering engineering.

4.2.5 The base and each plastering layer must be firmly bonded. The plastering layer shall be free from delamination and hollowing, and the surface layer shall be free from ash explosion and cracks.

Inspection method: observation; Tap the inspection with a small hammer; Check the construction records.

Description:

4.2.5 The key to the quality of plastering project is firm bonding without cracking, hollowing and falling off. If the bonding is not firm, defects such as hollowing, cracking and falling off will reduce the protective effect on the wall and affect the decorative effect. After investigation and analysis, the quality problems such as cracking, hollowing and falling off of plastering layer are mainly due to the uncleanness of the surface of the base, such as the dust, loose objects, release agent and oil stains on the surface of the base that affect the firm bonding of plastering; The surface of the matrix is smooth, and it is not roughened before plastering; Before plastering, the surface of the matrix is not watered thoroughly, and the water in the mortar after plastering is quickly absorbed by the matrix, resulting in poor quality and improper use of the mortar; One-time plastering is too thick, and drying shrinkage is large, which will affect the firm bonding between plastering layer and matrix.

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General project

4.2.6 The surface quality of general plastering works shall meet the following requirements:

1 Ordinary plastering surface shall be flat, clean and smooth with clear frame joints.

2 senior plaster surface should be smooth, clean, uniform color, no grain, frame joints and gray lines should be clear and beautiful.

Inspection method: observation; Touch check.

4.2.7 Plastering surfaces around corner protectors, holes, grooves and boxes shall be neat and smooth; The plastering surface behind the pipeline should be smooth.

Inspection method: observation.

4.2.8 The total thickness of plastering layer should meet the design requirements; Cement mortar shall not be plastered on the lime mortar layer; Surface plastering shall not be applied on the cement mortar layer.

Inspection method: check the construction records.

4.2.9 The setting of plastering frame joints shall meet the design requirements, with consistent width and depth, smooth surface and neat edges and corners.

Inspection method: observation; Check the ruler.

4.2. 10 drip line (tank) should be made for the parts with drainage requirements. Drip line (trough) should be neat and straight, drip line should be high inside and low outside, and the width and depth of drip tank should not be less than 10 mm.

Inspection method: observation; Check the ruler.

4.2. 1 1 The allowable deviation and inspection method of general plastering engineering quality shall comply with the provisions in Table 4.2. 1 1.

Table 4.2. 1 1 Allowable deviation and inspection method of general plastering

Inspection method of allowable deviation of project

Ordinary plastering advanced plastering

1 Check the verticality of the facade with a 2 m vertical measuring ruler.

2 Surface flatness 4 3 Check with 2 m guide rule and feeler gauge.

3 Angle of Yin and Yang founder 4 3 Check with right-angle measuring ruler.

4. Straightness of frame strips (seams) 4. 3 with 5 m line, less than 5 m stay, check with a steel ruler.

5. Straightness of dado and halter, lines 4, 3 and 5 m, less than 5 m, shall be checked with a steel ruler.

Note: 1) For ordinary plastering, the internal corner in Item 3 of this table does not need to be checked;

2) ceiling plastering. The surface smoothness in Item 2 of this table can be checked, but it should be smooth.

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4.3 Decoration plastering project

4.3. 1 This section is applicable to the quality acceptance of decorative plastering works such as water brushing stone, cutting fake stone, dry sticking stone and covering brick.

Description:

4.3. 1 According to the actual situation of decorative plastering in China, this specification retains the items such as water brush stone, cutting artificial stone, dry sticky stone and artificial brick in Code for Construction and Acceptance of Building Decoration Engineering (JGJ 73-9 1), and deletes terrazzo, brace ash, napping ash, sprinkling wool ash, sandblasting, spraying and artificial brick. But water brush stone wastes water resources and pollutes the environment, so it should be used as little as possible.

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Leading project

4.3.2 Before plastering, the dust, dirt and oil stains on the surface of the grass-roots unit should be removed and moistened with water.

Inspection method: check the construction records.

4.3.3 The varieties and properties of materials used in decorative plastering engineering should meet the design requirements. The setting time and stability of cement should be rechecked. The mixture ratio of mortar should meet the design requirements.

Inspection method: check the product certificate, entry acceptance record, re-inspection report and construction record.

4.3.4 Plastering works shall be carried out in layers. When the total plastering thickness is greater than or equal to 35 mm, strengthening measures should be taken. When plastering the joint surface of different materials, strengthening measures should be taken to prevent cracking. When steel mesh is used, the lap width of steel mesh and each matrix should not be less than100 mm.

Inspection method: Check the acceptance records and construction records of concealed works.

4.3.5 The plastering layer and the plastering layer must be firmly bonded with the matrix, and the plastering layer can not have delamination, hollowing and cracks.

Inspection method: observation; Tap the inspection with a small hammer; Check the construction records.

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General project

4.3.6 The surface quality of decorative plastering works shall meet the following requirements:

1 The surface of the water brush stone shall be clear, evenly distributed, dense and flat, with the same color, and there shall be no traces of dropping or picking up particles.

2. The seal grain on the surface of the fake stone should be even and straight, with the same depth, and there can be no missing print; Yang Angle should be cut horizontally with a uniform width, without trimming, and the edges and corners should be intact.

3 Dry-hung stone surface should be consistent in color, without slurry leakage, stone particles should be firmly bonded and evenly distributed, and there should be no obvious black edge at the external corner.

4 artificial brick surface should be smooth, clear grooves, neat joints, consistent color, can not have defects such as falling corners, peeling and sanding.

Inspection method: observation; Touch check.

4.3.7 Decorative plastering frame bars (joints) shall be set in accordance with the design requirements, with consistent width and depth, smooth surface and neat edges and corners.

Inspection method: observation.

4.3.8 drip line (tank) should be made for the parts with drainage requirements. Drip line (trough) should have a straight political lesson, drip line should be high inside and low outside, and the width and depth of the drip trough should not be less than 10. Strengthening measures should be taken. When plastering the joint surface of different materials, strengthening measures should be taken to prevent cracking. When steel mesh is used, the lap width of steel mesh and each matrix should not be less than100 mm.

Inspection method: observation; Check the ruler.

4.3.9 The allowable deviation and inspection method of decoration plastering engineering quality shall comply with the provisions in Table 4.3.9.

Table 4.3.9 Allowable deviation and inspection method of decorative plastering

Inspection method of allowable deviation (mm) of the project

Water brush stone chop artificial stone dry sticky stone artificial brick

1 The verticality of the facade is 5455. Check it with 2m guiding rule and feeler gauge.

2 Surface flatness 3 3 5 4 Check with 2m ruler and feeler gauge.

3 Yang Angle founder 3 3 4 4 Check with right angle measuring ruler.

4. The straightness of the frame strips (seams) shall be 3.333. Use 5m line. If it is less than 5m, pull the line and check it with a steel ruler.

5. The straightness between dado and tap foot is 3-3-use 5m line, if it is less than 5m, pull the line and check with a steel ruler.