Source: I still project pictures and text copyright belongs to the original author, if there is infringement, the background private message contact delete! The facade of the building is the facade of the garden, which is closely related to the delivery of the community and the customer’s living experience
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Once the external wall quality is formed, if it does not meet the standard, the rectification cost is very high
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The editorial team cooperated with the group purchasing center, combined with the manufacturer’s direct opinions and suggestions, to answer questions and solve doubts for the first line exterior wall coating construction disclosure of the project
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01 the storage of exterior wall coating requires that the coating should be placed indoors to avoid sunlight and rain
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The storage environment should be cool, dry and well ventilated
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No more than 4 layers can be stored
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Storage temperature at 0 ~ 35 ℃, there should be no freezing, and the remaining coating should be sealed
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Different batches of stone paint products should be stored separately, and mixed use of different batches of products is prohibited
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Products beyond their shelf life are strictly prohibited to use
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Expired products, poor adhesion, such as illegal use of late easy to fall off injury; And the color difference of expired products is different, which increases the difficulty of construction
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02 preparation before use of exterior wall coating after placing, there will be different degrees of precipitation and stratification
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After the can is opened, it should be completely stirred by mechanical stirrer before use, so as to avoid affecting the film-forming quality of the coating
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The coating should be diluted according to the dilution ratio specified in the technical requirements (product manual)
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Do not increase the dilution ratio by yourself
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Excessive dilution of primer can easily lead to later wall florescence and alkalescence; It is not recommended to dilute genuine stone paint
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It is forbidden to use reclaimed water with high salinity and alkalinity for dilution
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The dilution water must be clean water
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03 construction environment: the temperature required for construction is Between 5 ℃ and 40 ℃, construction is not recommended when the temperature is lower than 5 ℃, and construction is prohibited when the temperature is lower than 0 ℃
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The construction of exterior wall paint shall be avoided when the temperature of exterior wall paint is higher than 40 ℃ in summer or the wall is in direct sunlight（ The relative humidity of the environment should be less than or equal to 85%
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The construction of exterior wall paint is forbidden in rainy days, and the construction is restricted within 24 hours after the rain
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Avoid construction in strong wind of ≥ 5
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The site environment shall be clean and tidy without pollution source and dust
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04 construction steps: first external wall putty → second external wall putty → polishing → primer → seam paint → first finishing coat → finish coat
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Primer is an important functional material, which can play the role of alkali resistance and isolation, and strengthen the base of loose and weak base
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Topcoat can increase the gloss of exterior wall, play a role in dust prevention, and the lasting effect of exterior facade is very important
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But whether the construction is difficult to identify with naked eyes, easy to cut corners, on-site construction management should be strengthened
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The p-type (cement mortar wall) or R-type (external thermal insulation wall) cement external wall putty in accordance with JG / t157-2009 industry technical standard for building external wall putty must be used for base leveling
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The principle of thin batch and multiple times should be adopted
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The thickness of single pass putty should be about 1 mm, not too thick or too thin
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The base course of the finishing project should not appear the phenomenon of efflorescence and blooming
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If the base course appears efflorescence and blooming, it should be cleaned with 5% oxalic acid aqueous solution, and then washed with clean water
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The finishing can be carried out after it is dry
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On the surface of concrete base course with release agent, the interface agent shall be painted once before the putty construction
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The use of oily release agent is easy to cause the putty layer to fall off
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The primer should be rolled evenly to completely close the base material to avoid missing coating
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When spraying genuine stone paint, the gun speed should be uniform, and it is strictly forbidden to stop, so as to avoid inconsistent thickness of paint film during spraying
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During spraying operation, it is recommended to stop at the grid joint or internal and external corners
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Due to the different base plastering standards of the project, the coating rate and dosage of the materials are quite different
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It is suggested that the coating rate test should be conducted on the project site as the basis for the three parties (Party A, coating supplier and coating construction party) to confirm the material consumption standard
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The guidance value of coating rate in “2021 country garden interior and exterior wall coating technical standard” issued by the group purchasing center can be used as reference for the project
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After the completion of each coating, the paper shall be removed immediately before the surface of the coating is dry to avoid burrs
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If the paint film is completely dry, use a paper cutter to cut off the connection between the masking paper and the paint film before removing the masking paper
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06 common fault analysis: (1) batch color difference: Cause analysis: natural colored sand is used as pigment in stone like paint
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Natural colored sand is crushed from natural ore
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different batches of stone like paint will have slight color difference, which is normal
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Solution: the same batch of products are used for the same wall in the construction of real stone paint（ 2) Hair flower Cause analysis: uneven spraying led to blooming; The uneven or missed primer application results in uneven absorption of the surface paint on the substrate, resulting in blooming; The use of scaffolding construction, due to the obstruction of the pipe frame lead to flowers; The surface roughness of stone like paint is inconsistent, resulting in different light reflection and blooming
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Solution: use high power air compressor to keep the air pressure stable; When spraying, the gun should be used at a uniform speed
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If the spraying can not be done at one time, it is recommended to carry out the construction in two times
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It is strictly forbidden to stop in the process; The primer shall be applied as required to ensure that the primer is evenly applied without missed coating and sagging; It is suggested that hanging basket should be used for construction, and the large wall should be divided into grids; Control the coating rate
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This paper focuses on the storage and use requirements, construction steps and precautions of exterior wall coatings
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The subsequent editorial department will analyze the construction management and process acceptance of exterior wall coatings
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From the two aspects of technology and management, this paper analyzes the key points of external wall construction in detail to help the front-line management and practice of the project
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Internal and external wall plastering engineering construction technology disclosure! Tips for external wall insulation construction: if you like this article, please share it with your friends
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If you want more information, please pay attention to me..
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