How to do waterproof repair of buildings? Fully understand the construction acceptance of waterproof and leakage-patching materials.

Due to the aging of buildings or irregular construction, the roof or wall of buildings may leak, and building leakage is one of the most common housing problems. Timely repair and maintenance of houses can improve the living environment and prolong the service life of houses. So how to do a good job in waterproof repair of buildings? What waterproof and leakproof materials are there? Let's take a look at the encyclopedia of waterproof and leak-proof knowledge, and introduce you to the encyclopedia of waterproof and leak-proof materials construction acceptance knowledge!

1 Brief introduction of waterproof and plugging.

Waterproof and leak-patching

In a narrow sense, it is the construction of indoor and outdoor waterproof treatment of buildings and the construction of indoor and outdoor leakage areas. Broadly speaking, this is the waterproof treatment of space objects and the treatment of liquid and liquid leakage.

Definition of leak-proof device

No matter the water pressure, no matter whether it rains in the next few days, no matter the roof, in short, the paint in the room does not change color or blister.

Characteristics of water

Water is pervasive. It gradually penetrates into the building by wind pressure, convection, impact, adhesion, capillary and other forces, and it is not easy to be found from the surface during the infiltration process. In other words, to find the cause of water leakage, we must go deep into the "five internal organs" to analyze and judge, so as to suit the remedy to the case.

Air pressure change

Once water permeates into the building, in a limited space, when the sun shines, it generates heat energy, which will form steam. These vapors will generate great pressure, which is enough to destroy the original waterproof layer, even the surface decoration and decorative materials (such as paint peeling off, wallpaper blackening, tile swelling, wood floor swelling). In other words, if a unit of water turns into steam, it will produce 65438 in the limited space inside the building.

Grassroots requirements

There must be no expansion, sand, honeycomb, wood, scraps of paper, sludge and pebbles on the interface next to the waterproof material, nor can it be made on a loose and unstable surface, because of poor adhesion, coupled with the destruction of solar ultraviolet rays, the building itself expands with heat and contracts with cold, and the destruction of water vapor pressure is easy to cause the waterproof layer to age and fail.

Positive is better than negative.

If the roof is waterproof, it should be done directly on the roof, and the wall waterproof should be done directly on the outer wall and the inner layer of the water tank. If there is pressure, the water will spread to other places, and the dead corner in the house is not easy to construct. The "superiority" mentioned here is relative, not absolute. Because with the development of science and technology, waterproof materials for back construction and expanded crystals produced by high and low pressure injection of synthetic resin have been introduced in the market, which can also be waterproof, but not all occasions can be successfully constructed, so unless necessary, front waterproof construction should be adopted.

2 roofing waterproof material 1, CH- 108ZYY polymer cement waterproof coating

A two-component waterproof coating is based on acrylate synthetic polymer emulsion, and special cement, inorganic curing agent and various additives are added. It has good film forming, impermeability, cohesiveness, water resistance and weather resistance, and can be solidified and molded on wet base.

YY composite waterproof coating is divided into ZYY- 1 ZYY-2 models:

Among them, ZYY- 1 is mainly used for waterproofing of buildings with large deformation such as roofs, walls and bridge decks.

ZYY-2 is mainly used for building waterproofing in long-term immersion environment, such as basement, toilet and bathroom, swimming pool, reservoir, subway, tunnel, garbage disposal site and other projects.

2, HG203 waterproof sealing coating

A truly environmentally friendly one-component water-cured polyurethane waterproof sealing coating developed from imported raw materials.

HG203 waterproof sealing coating is suitable for wet base surface.

The solid content can be as high as 100%, with less materials per unit area; The required thickness can be realized in one structure. 100% environmental protection product, which is nontoxic, odorless and pollution-free after curing, and is suitable for drinking water engineering.

3.YYA special waterproof and impervious slurry

It is a new type of impervious and waterproof material, and it is a gray powder composed of dozens of pure inorganic components. Non-toxic and tasteless, flame retardant and environmentally friendly, and can be used in food and drinking water engineering. After adding water, a series of redox reactions will occur. After hardening, it has the characteristics of high strength (more than 7 days C35), water resistance, high temperature resistance (400℃), ultraviolet resistance, freezing resistance (-50℃), aging resistance, no shrinkage, oil stain resistance and strong adhesion. It can be used for water operation on a backward-facing surface.

Waterproof and impervious, with high strength and high water pressure resistance, it can be used in various underground concrete and masonry structures, such as subways, tunnels, basements, underground garages, underground passages, civil air defense projects, cable trenches, elevator shafts, mines, culverts and other difficult water leakage projects.

High and low temperature resistance, ultraviolet resistance, aging resistance, good freeze-thaw resistance (more than 400 times), used in various outdoor projects and indoor buildings, reservoirs, dams, bridges, power stations, pump houses, reservoirs, canals, dams, foundation pits, squares, roofs, bathrooms and so on. Details >>

3. External causes of water leakage on the top floor

Due to the unreasonable roof structure, the external walls of some old buildings in the past leaked after the rain or the walls were moldy because of their concrete slabs.

1, the house is old, it has lived for a long time, the maintenance measures are not done well, and the waterproof material of the roof layer of the house is aging and damaged, so the water leakage of the house is also a normal reason.

2. Many plants are planted on the top floor of some houses, which actually has a certain influence on the waterproof materials of houses.

It is not normal for builders to cut corners and use inferior waterproof materials to make the house watertight. However, with the strictness of the national construction quality supervision department, this situation is becoming less and less.

internal cause

The internal causes of water leakage at the top floor of a building mostly come from the waterproof layer or various pipes.

The leakage points on the top floor are generally concentrated in the kitchen and bathroom. When checking the water leakage point, we can do a closed water test first. If problems are found during this period, we should redo waterproofing. If there is no leakage, the problem may be in the pipeline. Details >>

4 waterproof plugging construction scheme 1. Before leveling cement mortar, mark the slope as required, and then install frame joints. In order to make the surface more flat and dense, and can be fully maintained, after the cement mortar is leveled, it should be calendered twice, the corner of the ground should be painted with a trowel, and the leveling layer with a diameter of 50cm around the impinges mouth should grind out pits.

2. The upper part of the separation seam is split at 1/2, and the lower part can be continuously opened or completely disconnected. The separation seam is embedded with sealing material.

3. Dust, gravel, oil stain and mortar bumps on the base should be cleaned first, and then waterproof layer construction should be carried out.

4. If there is a high-low span, the waterproof layer should be constructed according to the construction method from high to low. Within the same span, it should start from the lowest point and proceed from far to near.

5, coating waterproof layer before construction, to ensure that the construction base is dry, so to test it, waterproof coiled material can be laid flat on the leveling layer, wait for three to four hours before opening the waterproof coiled material for inspection. If there is no watermark on the waterproofing membrane and leveling layer, then the construction of coating waterproof layer can be carried out.

6. If large-scale coating construction is required, additional reinforcement shall be made before construction in places such as impinges mouth, gutter and cornice.

7. The thickness of waterproof coating should be determined according to the specification requirements of purchased waterproof materials. The thickness of synthetic polymer waterproof coating should be greater than or equal to 2miD_, and asphalt-based waterproof coating should be greater than or equal to 8mlTl.

8. After the waterproof coating is constructed, the second construction can only be carried out after it is completely dried to form a film, and the brushing direction of each time should be perpendicular to the brushing direction of the previous time.

9, corner and facade coating waterproof layer, can't have accumulation and flowing phenomenon, should brush a few times.

10, if you want to use cement mortar or fine stone concrete as protective layer, wait until the coating is completely dry and spread isolation layer before construction. Cement mortar or fine stone concrete shall be calendered and framed as required. The width of separation joint is 10mm, and the horizontal spacing should not be greater than 6m, so it can be filled with sealing material. Details >>

5. Acceptance of waterproof and leak-filling works 1. Acceptance of grass-roots units: before the waterproof layer construction, clean up the dust and sundries on the surface of grass-roots units that have passed the acceptance. At the grass-roots level of coiled material waterproof layer, the flashing slope should meet the design requirements, and the surface should be free of sand and air cracks, flat and clean, without water accumulation, and the angle of yin and yang should be made into circular arc or obtuse angle.

2. Acceptance of base treatment agent: the base surface treatment agent is diluted by adding chloroprene rubber asphalt binder into industrial gasoline, stirred evenly, and evenly coated on the base surface with a long roller brush or shotcrete machine. The coating should be uniform, without showing the bottom or accumulation, and there are no defects such as brush leakage and dripping leakage.

3, additional layer acceptance: parapet, impinges mouth, pipe root, eaves, Yin and Yang Angle, separation seam and other details must be additional layer, the additional range on both sides of not less than 250 ㎜; That is, the width of the additional layer is 500㎜, the width of the additional layer around the pipe root should not be less than 500㎜, and the separation seam should not be less than 250㎜. The material of the additional layer is SBS coiled material of the same material. Quality requirements cover baking, and the lap width is100 mm. Empty drum and folding are not allowed.

4. Large-area overall acceptance: The laying, overlapping and closing of waterproofing membrane shall meet the design requirements and technical specifications of roofing engineering. Bonding is firm, and there are no defects such as hollowing, slipping, warping, warping and breakage.

5. Lapping mode and width requirements: the coiled material shall be laid by lapping mode. During double-layer construction, the overlap between the upper and lower layers and the adjacent coiled materials is staggered 1/2, and the paving method is full adhesion, and the lap width of the long and short sides is not less than 100㎜. Lap joints parallel to the roof should be lapped in the direction of running water.

6. Acceptance of empty drum rate: when the coil is laid, the base is not dry, the shop is not carefully laid, and empty drums are easy to appear at the corners; When paving the coil, you should master the moisture content at the grass-roots level. If it doesn't meet the requirements, you can't lay the coil. At the same time, when paving the coil, it should be flat and solid, with tight blank holder and firm bonding.

7. Leakage: It mostly happens in details. When laying the additional layer, the additional layer should be attached, sealed and compacted from the cutting and pasting operation of the coil, and there should be no warping phenomenon.

8. Water storage test: After ground acceptance, it is required to conduct water storage test as a whole, and the water storage height should be at the highest point. The roof with a slope greater than 5% shall be subjected to water spraying test, and the water storage (water spraying) test time shall be no less than 24 hours. No leakage is qualified. Details >>

6 How many years is the warranty period for building waterproofing? When submitting the project completion acceptance report to the construction unit, the construction project contractor shall issue a quality guarantee to the construction unit. The quality warranty shall specify the warranty scope, warranty period and warranty responsibility of the construction project.

"Regulations on Quality Management of Construction Projects" Article 40 Under normal conditions of use, the minimum warranty period of a construction project is:

1. The infrastructure engineering, foundation engineering and main structure engineering of the building are the reasonable service life of the project specified in the design documents;

2, roofing waterproof project, bathroom, room and exterior wall waterproof requirements, for 5 years;

3. The heating and cooling system consists of two heating periods and cooling periods;

4, electrical pipes, water supply and drainage pipes, equipment installation and decoration engineering, for 2 years.

The warranty period of other projects shall be agreed by the employer and the contractor.

The warranty period of the construction project shall be calculated from the date when the project is completed and accepted.

Forty-first construction projects in the warranty scope and warranty period of quality problems, the construction unit shall fulfill the warranty obligations, and be responsible for the losses caused.

Forty-second construction projects need to continue to be used after a reasonable service life, the property owner shall entrust a survey and design unit with corresponding qualification grade for appraisal, and take measures such as reinforcement and maintenance according to the appraisal results to re-determine the service life.

Which company is better for waterproof and leakage prevention? Before choosing a company, we should first look at its construction qualification and business license, and then look at the online evaluation of the company. Today's waterproof repair is to be waterproof and leak-proof, just outside the tile, in the former place. The specific methods of trapping can refer to the specific methods on the Internet. We must pay attention to keeping the building itself dry before filling the leak. Check whether there is any gap in the leaking place, and fill it with cement if there is. Brush the brush directly on the leaking part of the building once, and don't splash water on the brushed part within 12 hours. But remember, don't make a waterproof layer in rainy days, and don't splash water on the construction site for 12 hours, so as not to affect the effect. Details >>

Building waterproof repair brand

Keshun repair

Beixin waterproof

Dongfang yuhong building maintenance

Century Hongyu SJHY

Hongxing Dongsheng

Gorga Gorkiya

Yuanda Hongyu

Hongyuan waterproof

Qinglong Building Materials Qinglong

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