阅读说明：本技术 一种既有建筑的外墙翻新方法 (Method for renovating external wall of existing building ) 是由 王欣博 宋易静 齐贺 杨金涛 田中省 杨强 王静贻 于 2019-07-27 设计创作，主要内容包括：本发明适用于建筑施工领域,提供了一种既有建筑的外墙翻新方法,至少包括外墙效果施工步骤、窗边塞缝及防水步骤以及女儿墙阳角处理步骤。采用本发明的翻新方法,可使既有建筑继续使用更长的时间,实现了建筑节能。并且,通过该方法翻新的外墙,基层平整、外观效果好。改善了窗框节点处不同材质结合处易出现开裂的问题,从而杜绝了后期的渗水漏水隐患的发生,可有效改善后期窗边漏水的发生,减少后期业主投诉及物业维修发生的费用。(The invention is applicable to the field of building construction, and provides an external wall renovating method of an existing building, which at least comprises an external wall effect construction step, a window edge seam plugging and waterproofing step and a parapet external corner processing step. By adopting the renovation method, the existing building can be continuously used for a longer time, and the energy conservation of the building is realized. In addition, the outer wall renovated by the method has a smooth base layer and a good appearance effect. The problem of the different material junctions of window frame node department easy appearance fracture is improved to stopped the emergence of the hidden danger of leaking water of later stage, can effectively improve the emergence that later stage window limit leaked water, reduced the expense that later stage owner complains and property maintenance takes place.)

1. A method for renovating the external wall of the existing building is characterized by at least comprising the following steps: the method comprises the following steps of outer wall effect construction, window side seam plugging and waterproofing and parapet wall external corner treatment; wherein the content of the first and second substances,

the outer wall effect construction step comprises:

s11, performing base layer processing;

s12, scraping and renovating putty;

s13, hanging a glass fiber net;

s14, scraping anti-crack waterproof putty and covering the glass fiber mesh;

s15, scraping fine putty;

s16, rolling and coating a primer;

s17, pointing, namely performing seam dividing by adopting ink lines, and brushing check seam paint at the ink lines;

s18, pasting a piece of pattern paper along the check seam paint;

s19, rolling and coating finish paint;

s20, tearing the pattern paper;

the window edge seam plugging and waterproof steps comprise:

s21, washing dust between the window frame and the wall body with clean water;

s22, filling the gap between the window frame and the wall with mortar to ensure that the gap is fully filled;

s23, uniformly rolling and coating the polymer cement waterproof coating along the periphery of the window frame;

s24, after the polymer cement waterproof coating is dried, carrying out a butyl waterproof tape pasting process;

s25, compacting by using a roller;

the method for processing the external corner of the parapet wall comprises the following steps:

s31, cleaning foreign matters on the surface;

s32, brushing a sealing primer on the construction part, and sealing dust and a base surface;

s33, sticking a waterproof adhesive tape, namely, sticking the waterproof adhesive tape on a vertical surface by stretching the adhesive tape when sticking the vertical surface under the condition that the waterproof adhesive tape on the horizontal surface is compacted;

and S34, compacting by using a female-angle roller and a male-angle roller respectively.

2. The method for renovating an outer wall of an existing building as claimed in claim 1, wherein the base layer treatment comprises the following steps:

s111, base layer strength inspection: generally, the qualified base layer is inspected by means of visual inspection, beating, carving and the like, and the base layer does not have the phenomena of powder falling, sanding, hollowing, layer forming, cracking and peeling. The cement mortar base layer plastering meets the high-grade plastering requirement, the surface is leveled, compacted and smoothed, the color is consistent, no lines and scratches are generated, and the plastering joint is gentle;

s112, base surface inspection: integrally detecting the adhesion condition of the outer wall tiles, checking whether hollowing exists or not, and marking the hollowing position;

s113, removing empty drums: the protection plate is inserted below the hollowing position and needs to abut against a wall body, so that the situation that ceramic tiles after being shoveled fall to the bottom surface to cause splashing of ceramic tile fragments and injury of pedestrians or vehicles is avoided. Note that: the hollow drum is required to remove the ceramic tile, and the mortar bonding layer on the back surface of the ceramic tile is also required to be shoveled;

s114, flatness inspection of the base layer: the method comprises four items of surface flatness, vertical internal and external angles, vertical faces and square internal and external angles, wherein the surface flatness is checked by using a 2m ruler; checking the positive and negative angle square by using a 200mm square ruler; the elevation is vertically checked by a 2m line supporting plate and a ruler, the depth of a dividing joint is ensured to be consistent, the dividing joint is horizontal and vertical, no edge or corner is missing, a water dropping line is straight and firm, no surface defect exists, and the flashing gradient meets the design requirement;

s115, maintenance of the base layer: the water content of the base layer suitable for coating construction is ensured to be lower than 10%, and the pH value is less than 10; curing the cement mortar base layer for 28 days under the condition of good ventilation, and ensuring that the water content and the pH value meet the requirements; in the places with low temperature, high humidity and poor ventilation, the drying time is correspondingly prolonged, the newly plastered mortar is required to be more than 3 weeks, and the newly poured concrete is required to be more than 4 weeks;

s116, processing other problems of the basic layer: the surface of the base layer is cleaned from floating slurry, dust and oil stains, various components, embedded parts and water heating facilities on the wall surface are installed and positioned as soon as possible according to the design requirements, the exposed steel parts need to be subjected to rust removal and rust prevention treatment, and the oily sealing primer is coated immediately after rust removal.

3. The method for renovating an outer wall of an existing building according to claim 2, wherein the base layer treatment further comprises a base surface cleaning step, and the base surface cleaning step specifically comprises:

s117, completely removing the poor hardening or separating the unshelled part, removing floating ash by using a wire brush,

s118, removing the powder-state adhesive substance by using a brush, a broom or a dust collector,

s119, removing splashed objects and mortar splashed objects during welding by using a scraper, a wire brush or a grinding machine,

s120, removing the oil and fat, the release agent and the adhesive of the sealing material by using an organic solvent or a chemical detergent,

s121, removing rust spots and mildew spots by using a chemical rust remover and a mildew remover,

and S122, removing the surface whitening substances by using a steel wire brush and a dust remover.

4. The method for renovating an outer wall of an existing building as claimed in claim 1, wherein the putty applying and net hanging specifically comprises the following steps:

s123, pouring water into a clean empty barrel according to the proportion, then pouring renovated putty powder, adding the blend liquid according to the proportion, and stirring by using an electric stirrer; when the mixture is stirred by a large barrel, the mixture is stirred for 5 minutes, is kept still for 5 minutes and then is stirred for 3 minutes, the water consumption can be increased according to the condition of air temperature, and the mixture is stirred into uniform high paste without particles;

s124, stirring needs to be carried out in the shade, and the stirring cannot be carried out in the sun to prevent skinning and influence the construction quality;

s125, at the air temperature of 20 ℃, the stirred putty needs to be used up in 4 hours, the higher the air temperature is, the usable time can be correspondingly shortened, and the putty needs to be prepared at any time;

s126, when the temperature is too high in summer, the wall surface is wetted by clean water;

s127, removing floating slurry and other wall surface residues influencing the appearance by using a scraper knife before scraping and renewing putty;

s128, scraping by using a scraping knife according to a conventional method, wherein the force is applied uniformly as much as possible during scraping so that the renovated putty is fully adhered to the wall surface;

s129, scraping the renovated putty evenly and smoothly;

s130, after the first time of putty renovation construction is finished, carrying out net hanging treatment, carrying out second time of batch scraping of anti-crack mortar after the surface is dried completely or on the second day, and adding waterproof rubber powder according to the proportion when the anti-crack mortar is batch scraped;

s131, the thickness batch scraping of the second putty batch scraping is slightly thinner than that of the first putty, and if the batch scraping is too thick, empty drum is caused, and powder falling is caused if the batch scraping is too thin;

s132, finishing the second putty batch scraping, flattening scratches of the wall surface by using a batch knife when the wall surface is 7-8 dry, performing press polishing, and performing batch scraping on the third putty if the base surface is not smooth enough;

s133, polishing the surface of the putty;

s134, sanding putty by using sand paper, wherein sanding must be performed from the periphery to the center, and corners are polished by taking extra care and can be straight as much as possible; the sand paper is not worn or the putty is not worn, and after the scraper is printed and ground by the sand paper, the floating dust is cleaned.

And S135, finishing polishing within 48 hours, otherwise, increasing the putty strength and increasing the polishing strength.

And S136, testing the water content and the PH value after the putty construction is finished, wherein the national standard of the water content is less than 8 percent or the enterprise standard of the water content is less than 14 percent, and the PH value is less than 10, and the primer construction can be carried out after the requirement is met.

5. A method for renovating an exterior wall of an existing building according to claim 1, wherein the rolling primer comprises the following steps:

s161, adding water to dilute the primer according to the product specification, and fully stirring to construct;

s162, carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing primer construction when the weather is clear after the water content of the base layer is inspected to be less than 10%;

s163, carrying out necessary wrapping and covering on metal parts such as doors and windows, air conditioner supports and the like before base layer bottom sealing, and removing after the integral finished product is finished so as to prevent pollution and corrosion;

s164, performing roller coating of a primer by using a roller;

and S165, constructing the primer from top to bottom by using a small surface and a large surface. In order to obtain the best leveling effect, the wet edge operation is kept in the construction, the continuous construction is kept on the whole wall surface, the midway stopping is not allowed, and the construction is interrupted at the position where the natural breaking can be realized;

s166, primer construction ensures that no bottom leakage, no sagging and primer brushing can not occur;

s167, after the construction is finished, the next procedure can be carried out only by waiting for drying;

and S168, if local repair occurs during the process of the project, the repair position should be re-primed after the wall body is dried.

6. An exterior wall renovation method of an existing building according to claim 1, characterized in that the pointing specifically comprises the following steps:

s171, typesetting the elastic lines according to the design position and the size, arranging the elastic lines into a whole block as much as possible according to the size of the wall, and if the size of the block is difficult to adjust properly, at least ensuring that each wall is consistent, calculating the seam width and the whole size requirement;

s172, checking whether the ink line is correct after the ink line is ejected;

s173, rolling and coating check seam paint at the position of the bullet line;

s174, covering the check joint paint by using adhesive tape paper, and finishing the joint pointing twice, so that the edge of the paint is straight and beautiful;

s175, sticking adhesive tapes according to the independent construction surface and the construction amount every day;

s176, sticking the adhesive tape from left to right along the elastic line uniformly and transversely, and sticking the adhesive tape from top to bottom vertically to ensure that the slot line is in through alignment from front to back, left to right and right;

s177, cutting the parts capable of being crossed and overlapped according to the direction beneficial to construction;

s178, the adhesive tape needs to be tightly adhered to prevent the adhesive tape from falling off during coating;

and S179, a wet base layer or climate are not favorable for the sticking and the attachment of the adhesive tape, so that the adhesive tape can be stuck at any time according to the construction progress.

7. The method for renovating an outer wall of an existing building as claimed in claim 1, wherein the roller coating finish paint comprises the following steps:

s191, adding water to dilute the finish paint according to the product specification, and fully stirring to construct;

s192, carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing finish construction when the weather is clear after the water content of the base layer is inspected to be less than 10%;

s193, carrying out necessary wrapping and covering on metal parts such as doors, windows, air conditioner supports and the like before the base layer is bottomed, and removing the whole finished product to prevent pollution and corrosion;

s194, roller coating of finish paint is carried out by using a roller;

s195, constructing from top to bottom by using a small surface and a large surface firstly during finish paint construction, keeping wet edge operation in construction, keeping continuous construction on the whole wall surface without allowing to stop midway, and interrupting construction at a position where the finish paint can be naturally broken;

and S196, finishing construction ensures that no bottom leakage, no sagging and no finish leakage can be realized.

Technical Field

The invention belongs to the field of building construction, and particularly relates to an outer wall renovating method of an existing building.

Background

The existing method for renovating the external wall mainly comprises the step of brushing paint after leveling putty on the external wall, but a series of problems such as hollowing of a base plane, adhesion of the putty, waterproofing of a window edge and the like cannot be effectively guaranteed, so that the problems of water leakage, falling off and the like of the wall body can occur in the later period of a building.

Therefore, a new method for renovating an outer wall applied to an existing building is needed.

Disclosure of Invention

The invention aims to provide an outer wall renovating method of an existing building, and aims to solve the problems that the existing outer wall renovating method cannot solve the problems that the base surface of an outer wall is hollow and drum, the adhesive force of putty is insufficient, and the water resistance of a window edge is poor.

The invention is realized in this way, a method for renovating the external wall of the existing building at least comprises the steps of external wall effect construction, window edge seam plugging and water proofing and the step of treating the external corner of the parapet wall; wherein the content of the first and second substances,

the outer wall effect construction step comprises:

s11, performing base layer processing;

s12, scraping and renovating putty;

s13, hanging a glass fiber net;

s14, scraping anti-crack waterproof putty, and covering the glass fiber mesh;

s15, scraping fine putty;

s16, rolling and coating a primer;

s17, pointing, namely performing seam dividing by adopting ink lines, and brushing check seam paint at the ink lines;

s18, pasting a piece of pattern paper along the check seam paint;

s19, rolling and coating finish paint;

s20, tearing the pattern paper;

the window edge seam plugging and waterproof steps comprise:

s21, washing dust between the window frame and the wall body with clean water;

s22, filling the gap between the window frame and the wall with mortar to ensure that the gap is fully filled;

s23, uniformly rolling and coating the polymer cement waterproof coating along the periphery of the window frame;

s24, after the polymer cement waterproof coating is dried, carrying out a butyl waterproof tape pasting process;

s25, compacting by using a roller;

the method for processing the external corner of the parapet wall comprises the following steps:

s31, cleaning foreign matters on the surface;

s32, brushing a sealing primer on the construction part, and sealing dust and a base surface;

s33, sticking a waterproof adhesive tape, namely, sticking the waterproof adhesive tape on a vertical surface by stretching the adhesive tape when sticking the vertical surface under the condition that the waterproof adhesive tape on the horizontal surface is compacted;

and S34, compacting by using a female-angle roller and a male-angle roller respectively.

Further, the base layer processing specifically includes the steps of:

s111, base layer strength inspection: generally, the qualified base layer is inspected by means of visual inspection, beating, carving and the like, and the base layer does not have the phenomena of powder falling, sanding, hollowing, layer forming, cracking and peeling. The cement mortar base layer plastering meets the high-grade plastering requirement, the surface is leveled, compacted and smoothed, the color is consistent, no lines and scratches are generated, and the plastering joint is gentle;

s112, base surface inspection: integrally detecting the adhesion condition of the outer wall tiles, checking whether hollowing exists or not, and marking the hollowing position;

s113, removing empty drums: the protection plate is inserted below the hollowing position and needs to abut against a wall body, so that the situation that ceramic tiles after being shoveled fall to the bottom surface to cause splashing of ceramic tile fragments and injury of pedestrians or vehicles is avoided. Note that: the hollow drum is required to remove the ceramic tile, and the mortar bonding layer on the back surface of the ceramic tile is also required to be shoveled;

s114, flatness inspection of the base layer: the method comprises four items of surface flatness, vertical internal and external angles, vertical elevation and square internal and external angles, wherein the surface flatness is checked by using a 2m ruler; checking the positive and negative angle square by using a 200mm square ruler; the elevation is vertically checked by a 2m line supporting plate and a ruler, the depth of a dividing joint is ensured to be consistent, the dividing joint is horizontal, flat, vertical and straight, no edge or corner is missing, a water dropping line is straight and firm, no surface defect exists, and the flashing gradient meets the design requirement;

s115, maintenance of the base layer: the water content of the base layer suitable for coating construction is ensured to be lower than 10%, and the pH value is less than 10; curing the cement mortar base layer for 28 days under the condition of good ventilation, and ensuring that the water content and the pH value meet the requirements; in the places with low temperature, high humidity and poor ventilation, the drying time is correspondingly prolonged, the newly plastered mortar is required to be more than 3 weeks, and the newly poured concrete is required to be more than 4 weeks;

s116, processing other problems of the basic layer: the surface of the base layer is cleaned from floating slurry, dust and oil stains, various components, embedded parts and water heating facilities on the wall surface are installed and positioned as soon as possible according to the design requirements, the exposed steel parts need to be subjected to rust removal and rust prevention treatment, and the oily sealing primer is coated immediately after rust removal.

Further, the base layer processing further comprises a base surface cleaning step, and the base surface cleaning step specifically comprises:

s117, completely removing the poor hardening or separating the unshelled part, removing floating ash by using a wire brush,

s118, removing the powder-state adhesive substance by using a brush, a broom or a dust collector,

s119, removing splashed objects and mortar splashed objects during welding by using a scraper, a wire brush or a grinding machine,

s120, removing the oil and fat, the release agent and the bonding material of the sealing material by using an organic solvent or a chemical detergent,

s121, removing rust spots and mildew spots by using a chemical rust remover and a mildew remover,

and S122, removing the surface whitening substances by using a steel wire brush and a dust remover.

Further, the batch scraping and renovating putty and the net hanging specifically comprise the following steps:

s123, pouring water into a clean empty barrel according to the proportion, then pouring renovated putty powder, adding the blend liquid according to the proportion, and stirring by using an electric stirrer; when the mixture is stirred by a large barrel, the mixture is stirred for 5 minutes, is kept still for 5 minutes and then is stirred for 3 minutes, the water consumption can be increased according to the condition of air temperature, and the mixture is stirred into uniform high paste without particles;

s124, stirring is carried out in the shade, and the stirring cannot be carried out in the sun to prevent skinning and influence construction quality;

s125, at the air temperature of 20 ℃, the stirred putty needs to be used up within 4 hours, the higher the air temperature is, the usable time can be correspondingly shortened, and the putty needs to be prepared at any time;

s126, when the temperature is too high in summer, the wall surface is wetted by clean water;

s127, removing floating slurry and other wall surface residues influencing the appearance by using a scraper knife before scraping and renewing putty;

s128, scraping by using a scraping knife according to a conventional method, wherein the force is applied uniformly as much as possible during scraping so that the renovated putty is fully adhered to the wall surface;

s129, scraping the renovated putty evenly and smoothly;

s130, after the first time of putty renovation construction is finished, carrying out net hanging treatment, carrying out second time of batch scraping of anti-crack mortar after the surface is dried completely or on the second day, and adding waterproof rubber powder according to the proportion when the anti-crack mortar is batch scraped;

s131, the thickness batch scraping of the second putty batch scraping is slightly thinner than that of the first putty, and if the batch scraping is too thick, hollowing is caused, and powder falling is caused if the batch scraping is too thin;

s132, finishing the second putty batch scraping, flattening scratches of the wall surface by using a batch knife when the wall surface is 7-8 dry, performing press polishing, and performing batch scraping on the third putty if the base surface is not smooth enough;

s133, polishing the surface of the putty;

s134, sanding putty by using sand paper, wherein sanding must be performed from the periphery to the center, and corners are polished by taking extra care and can be straight as much as possible; the sand paper is not worn or the putty is not worn, and after the scratch board is printed and polished by the sand paper, the floating dust is cleaned.

And S135, finishing polishing within 48 hours, otherwise, increasing the putty strength and increasing the polishing strength.

And S136, testing the water content and the PH value after the putty construction is finished, wherein the national standard of the water content is less than 8 percent or the enterprise standard of the water content is less than 14 percent, and the PH value is less than 10, and the primer construction can be carried out after the requirement is met.

Further, the roll-on primer specifically comprises the following steps:

s161, adding water to dilute the primer according to the product specification, and fully stirring to construct;

s162, carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing primer construction when the weather is clear after the water content of the base layer is inspected to be less than 10%;

s163, carrying out necessary wrapping and covering on metal parts such as doors and windows, air conditioner supports and the like before base layer bottom sealing, and removing after the integral finished product is finished so as to prevent pollution and corrosion;

s164, performing roller coating of a primer by using a roller;

and S165, constructing the primer from top to bottom by using a small surface and a large surface. In order to obtain the best leveling effect, the wet edge operation is kept in the construction, the continuous construction is kept on the whole wall surface, the midway stopping is not allowed, and the construction is interrupted at the position where the natural breaking can be realized;

s166, primer construction ensures that no bottom leakage, no sagging and primer brushing can not occur;

s167, after the construction is finished, the next procedure can be carried out only by waiting for drying;

and S168, if local repair occurs during the process of the project, coating the priming paint again after the wall body is dried at the repaired position.

Further, the pointing specifically comprises the following steps:

s171, typesetting the elastic lines according to the design position and the size, arranging the elastic lines into a whole block as much as possible according to the size of the wall, and if the size of the block is difficult to adjust properly, at least ensuring that each wall is consistent, calculating the seam width and the whole size requirement;

s172, checking whether the ink line is correct after the ink line is ejected;

s173, rolling and coating check seam paint at the position of the bullet line;

s174, covering the check joint paint by using adhesive tape paper, and finishing the joint pointing twice, so that the edge of the paint is straightened and attractive;

s175, sticking adhesive tapes according to the independent construction surface and the construction amount every day;

s176, sticking the adhesive tape from left to right along the elastic line uniformly and transversely, and sticking the adhesive tape from top to bottom vertically so as to ensure that the slot line is in through alignment from front to back, left to right and right;

s177, cutting the parts capable of being crossed and overlapped according to the direction beneficial to construction;

s178, the adhesive tape needs to be tightly adhered to prevent the adhesive tape from falling off during coating;

and S179, a wet base layer or climate are not favorable for the sticking and the attachment of the adhesive tape, so that the adhesive tape can be stuck at any time according to the construction progress.

Further, the roller coating finish paint specifically comprises the following steps:

s191, adding water to dilute the finish paint according to the product specification, and fully stirring to construct;

s192, carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing finish construction when the weather is clear after the water content of the base layer is inspected to be less than 10%;

s193, carrying out necessary wrapping and covering on metal parts such as doors, windows, air conditioner supports and the like before the base layer is bottomed, and removing the whole finished product to prevent pollution and corrosion;

s194, roller coating of finish paint is carried out by using a roller;

s195, constructing from top to bottom by using a small surface and a large surface firstly during finish paint construction, keeping wet edge operation in construction, keeping continuous construction on the whole wall surface without allowing to stop midway, and interrupting construction at a position where the finish paint can be naturally broken;

and S196, finishing construction ensures that no bottom leakage, no sagging and no finish leakage can be realized.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a renovation method for the outer wall of the existing building, so that the existing building can be continuously used for a longer time, and the energy conservation of the building is realized. In addition, the outer wall renovated by the method has a smooth base layer and a good appearance effect. The problem that the joint of different materials at the position of the window frame node is easy to crack is solved, so that the hidden danger of water seepage and water leakage in the later period is avoided, the water leakage in the later period at the window edge can be effectively improved, and the cost for the later period owner to complain and the property maintenance is reduced.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed or removable connections or both; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides an external wall renovating method of an existing building, which mainly comprises an external wall effect construction step, a window edge seam plugging and waterproofing step and a parapet external corner processing step.

Firstly, the construction steps of the outer wall effect comprise:

1. base layer treatment:

11. and (3) base layer strength inspection: generally, the qualified base layer is inspected by means of visual inspection, beating, carving and the like, and the base layer does not shed powder, does not sand, and does not have the phenomena of hollowing, layer rising, cracking and peeling. The cement mortar base layer plastering meets the high-grade plastering requirement, the surface is leveled, compacted and smoothed, the color is consistent, no lines and scratches are generated, and the plastering joint is level and slow;

12. base surface inspection: integrally detecting the adhesion condition of the outer wall tiles, checking whether hollowing exists or not, and marking the hollowing position;

13. removing the empty drum: the protection plate is inserted below the hollowing position and needs to abut against a wall body, so that the situation that ceramic tiles after being shoveled fall to the bottom surface to cause splashing of ceramic tile fragments and injury of pedestrians or vehicles is avoided. Note that: the hollow drum is required to remove the ceramic tile, and the mortar bonding layer on the back surface of the ceramic tile is also required to be shoveled;

14. and (3) flatness inspection of the base layer: the method comprises four items of surface flatness, vertical internal and external angles, vertical surfaces and positive internal and external angles, wherein the surface flatness is checked by using a 2m ruler; checking the positive and negative angle square by using a 200mm square ruler; the elevation is vertically checked by a 2m line supporting plate and a ruler, the depth of a dividing joint is ensured to be consistent, the dividing joint is horizontal and vertical, no edge or corner is missing, a water dropping line is straight and firm, no surface defect exists, and the flashing gradient meets the design requirement;

15. curing the base layer: the water content of the base layer suitable for coating construction is ensured to be lower than 10%, and the pH value is less than 10; curing the cement mortar base layer for 28 days under the condition of good ventilation, and ensuring that the water content and the pH value meet the requirements; in the places with low temperature, high humidity and poor ventilation, the drying time is correspondingly prolonged, the newly plastered mortar is required to be more than 3 weeks, and the newly poured concrete is required to be more than 4 weeks;

16. handling other problems of the base layer: the surface of the base layer is cleaned from floating slurry, dust and oil stains, various components, embedded parts and water heating facilities on the wall surface are installed and positioned as soon as possible according to the design requirements, the exposed steel parts need to be subjected to rust removal and rust prevention treatment, and oil seal primer is coated immediately after rust removal;

17. removing the hardened part or separating the hulled part, removing floating ash with a wire brush,

18. removing the powder-state adhesive substance with a brush, a broom or a dust collector,

19. removing spatters and mortar spatters during welding by using a scraper, a wire brush or a sander,

20. removing the adhesion of oil and fat, mold release agent and sealing material with organic solvent or chemical detergent,

21. removing rust spots and mildew spots by using a chemical rust remover and a mildew remover,

22. removing the whitening substances on the surface by using a steel wire brush and a dust remover;

23. pouring water into a clean empty barrel according to the proportion, then pouring renovated putty powder, adding the blend according to the proportion, and stirring by using an electric stirrer; when the mixture is stirred by a large barrel, the mixture is stirred for 5 minutes, is kept still for 5 minutes and then is stirred for 3 minutes, the water consumption can be increased according to the condition of air temperature, and the mixture is stirred into uniform high paste without particles;

24. stirring needs to be carried out in the shade, and the stirring cannot be exposed to the sun, so that the skinning is prevented, and the construction quality is influenced;

25. the stirred putty needs to be used up within 4 hours at the air temperature of 20 ℃, the service life is correspondingly shortened when the air temperature is higher, and the putty needs to be prepared along with the use;

26. when the temperature is too high in summer, the wall surface is wetted by clear water;

27. removing wall surface residues such as floating slurry and the like which affect the appearance by using a scraper knife before scraping and renovating putty;

28. scraping by using a scraping knife according to the conventional method, wherein the force is applied uniformly as much as possible during scraping so as to fully bond the renovated putty and the wall surface;

29. the batch scraping of the renovated putty is uniform and smooth;

30. after the first time of renovating putty construction is finished, glass fiber net hanging treatment is carried out, secondary batch scraping of anti-crack mortar can be carried out after the surface is dried completely or on the second day, and waterproof rubber powder is added according to the proportion when the anti-crack mortar is batch scraped;

31. the thickness batch scraping of the second putty batch scraping is slightly thinner than that of the first putty batch scraping, and if the batch scraping is too thick, empty drum can be caused, and if the batch scraping is too thin, powder can be removed;

32. after the second putty batch scraping is finished, when the wall surface is 7-8 dry, the scratch of the wall surface is flattened by a batch knife, and the wall surface is calendered, and if the base surface is not smooth enough, the third putty batch scraping is needed;

33. polishing the surface of the putty;

34. the putty is polished by sand paper, the polishing must be operated from the periphery to the center, and the corners are polished by extra care and can be straight as much as possible; the sand paper is not worn or the putty is not worn, and after the scraper is printed and ground by the sand paper, the floating dust is cleaned.

35. And finishing polishing within 48 hours, otherwise, increasing the strength of the putty and increasing the polishing strength.

36. Testing the water content and the PH value after the putty construction is finished, wherein the national standard of the water content is less than 8 percent or the enterprise standard of the water content is less than 14 percent, and the PH value is less than 10, and the primer construction can be carried out after the requirement is met;

37. the roll coating primer specifically comprises the following steps:

according to the product specification, adding water to dilute the primer, and fully stirring to construct;

carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing primer construction when the weather is clear after the water content of the base layer is checked to be less than 10%;

necessary wrapping and covering metal parts such as doors and windows, air conditioner supports and the like before the base layer is sealed, and removing the whole finished product to prevent pollution and corrosion;

rolling and coating a primer by using a roller;

during the construction of the primer, the primer is constructed from small surface to large surface from top to bottom. In order to obtain the best leveling effect, the operation of keeping the wet edge is carried out in the construction, the continuous construction is kept on the whole wall surface, the midway stopping is not allowed, and the construction is interrupted at the position where the natural breaking can be carried out;

the primer construction ensures no bottom leakage, no sagging and no primer leakage;

after the construction is finished, the next procedure can be carried out only by drying after the construction is finished;

if the local repair occurs during the process of the project, the repair position should be re-primed after the wall body is dried.

38. Pointing, adopting elastic ink line parting, and brushing check seam paint at the ink line. The pointing specifically comprises the following steps:

typesetting the elastic lines according to the designed position and size, arranging the elastic lines into blocks as much as possible according to the size of the wall, and calculating the seam width and the whole size requirement if the size of each block is adjusted properly and difficultly to ensure that each wall is consistent at least;

checking whether the ink line is correct after the ink line is ejected;

rolling and coating check paint at the position of the bullet line;

covering the check paint by using adhesive tape paper, and finishing the joint pointing twice, so that the edge of the paint is straightened and attractive;

sticking adhesive tapes according to the independent construction surface and the construction amount every day;

when the adhesive tape is pasted, the adhesive tape is pasted from left to right along the elastic line uniformly and transversely, and from top to bottom vertically, so that the slot line is ensured to be penetrated and aligned front to back, left to right;

the crossed and overlapped parts are cut off according to the direction which is favorable for construction;

the adhesive tape needs to be tightly adhered to prevent falling off during coating;

the moist substrate or climate is not favorable for the sticking and adhesion of the adhesive tape, so the adhesive tape should be stuck at any time according to the construction progress.

39. And pasting the masking paper along the check seam paint.

40. The roller coating finish paint specifically comprises the following steps:

adding water to dilute the finish paint according to the product specification, and fully stirring the mixture to construct the paint;

carefully inspecting the base surface from details to a large area, removing impurities such as floating ash and the like, confirming that the base surface meets the requirements, and performing finish construction when the weather is clear after the water content of the base layer is checked to be less than 10%;

necessary wrapping and covering metal parts such as doors and windows, air conditioner supports and the like before the bottom sealing of the base layer, and removing the whole finished product to prevent pollution and corrosion;

rolling and coating finish paint by using a roller;

during finish paint construction, small surfaces are firstly constructed and then large surfaces are constructed from top to bottom, in order to obtain the best leveling effect, wet edge operation is kept during construction, continuous construction is kept on the whole wall surface, stopping in the midway is not allowed, and construction is interrupted at a position where the wall surface can be naturally broken;

and the finish construction ensures no bottom leakage, no sagging and no finish leakage.

41. Tearing the beautiful line paper.

Secondly, the window edge seam plugging and waterproof steps comprise:

1. flushing dust between the window frame and the wall body with clean water;

2. filling a gap between the window frame and the wall body with mortar to ensure that the gap is fully filled;

3. uniformly rolling and coating the polymer cement waterproof coating along the periphery of the window frame;

4. after the polymer cement waterproof coating is dried, a butyl waterproof adhesive tape pasting process is carried out;

5. and (5) performing compaction treatment by using a roller.

Thirdly, the step of processing the external corner of the parapet wall comprises the following steps:

1. cleaning foreign matters on the surface by using a scraper knife;

2. coating a sealing primer on the construction part, and sealing dust and a base surface;

3. the waterproof adhesive tape sticking process is carried out, and the adhesive tape is stretched to stick on a vertical surface when sticking the vertical surface under the condition that the waterproof adhesive tape on the horizontal surface is compacted;

4. compacting by using a concave angle roller and a convex angle roller respectively.

The embodiment improves a renovation method for the outer wall of the existing building, so that the existing building can be continuously used for a longer time, and the energy conservation of the building is realized. In addition, the outer wall renovated by the method has a smooth base layer and a good appearance effect. The problem that the joint of different materials of window frame node department is easy to appear the fracture is improved to stopped the emergence of the hidden danger of leaking water of later stage, can effectively improve the emergence that later stage window limit leaked water, reduced the expense that later stage industry owner complains and property maintenance takes place.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.