Source lei told you | waterproof coating the thicker the better?

Release time:

2024-01-29 09:35


source lei told you | waterproof coating the thicker the better?


Now,The problem of water leakage in housing construction is frequent, and the global building leakage rate remains high.The root cause is the problem of materials and construction. First of all, the material is the problem of fake and shoddy, and the construction is what we often say to cut corners, blindly reduce the use of materials and reduce costs.Since "material reduction" will cause problems, is it better to brush as thick as possible?


Waterproof coating is not the thicker the better

First of all, waterproof coating is too thick will causeUneven brushingAfter drying, the uneven places willdelamination cracking, and even accelerate water leakage (Especially at the junction between the ground and the wall, around the sewer pipe; Secondly, when laying ceramic tiles, too thick waterproof coating will lead to cement mortar or ceramic tile glue smeared on ceramic tiles,Water cannot penetrate quicklyGet in there. The tiles that are laid in this way cannot be tightly fixed to the wall, and the tiles willEasy to hollow drum loose, even peeling.

Finally, in terms of price/performance ratio, overcoatedTime-consuming, labor-consuming and material-consumingUneconomic.


Regarding the thickness of waterproof coating, relevant standards and specifications have clear requirements, suchJGJ298-2013 Technical Code for Indoor Waterproofing of Residential BuildingsThe minimum thickness of the waterproof layer of indoor waterproof engineering is required to be standardized, and the thickness of the waterproof layer is different for different types of waterproof coatings.


For example: if selectedPolymer cement waterproof coating, the plane should be not less than 1.5mm thick, the vertical plane should not be lower1mmThick; if selectedWater emulsion type asphalt waterproof coating, the plane should be not less2mmThick, the vertical plane should not be lower1.5mmThick; if selectedThe thickness of waterproof mortar mixed with waterproof agent shall not be less20mm(The thickness can be appropriately adjusted depending on the technical performance of the product).


How to ensure the thickness of the coating waterproof layer


Waterproof thickness, height should not be too thick too high, to ensure that the thickness of the waterproof coating can be achieved by controlling the amount of material per square meter.The construction principle of waterproof layer is "thin brush multi-layer", the correct operation should be: generally brush twice,From top to bottom, from far to near, the second time of brushing, the waterproof layer should be brushed on the premise that the waterproof layer is not sticky before brushing, and the two times before and after brushingA cross, thickness to reach 1.5~2mm thick.

 The waterproof of the ground needs to be painted from the inside out, and in the process of paintingEnsure uniform and delicate. If it is molded at one time, if it is coated too thickly, the surface of the coating will be dry but the inside will not be dry, and the water will not evaporate, resulting in soft and thin waterproof layer, which will be broken when touched.


Housewaterproof coatingConstruction Dosage Reference


Waterproof coating is too thick, but if the coating is too thin and easy to aging failure, so the thickness must be moderate. The following is a reference for the amount of several common construction environments:


1. Toilet, kitchen


When making waterproof layer in toilet, waterproof coating is usually applied twice. It is necessaryPay attention to the waterproof of yin and yang corners and whether there is any crack around the sewer pipe.. The recommended waterproof layer thickness for toilet and kitchen parts is 1-1.5mm, and the permeable parts such as floor drain and pipeline must be repeated (4-7Over) brush, it is about required per square meter.1.5-2.5Kilograms.



2. Building roof and balcony


It is recommended that the thickness of waterproof layer is 1-1.2mm for intermittent waterproof (non-long-term immersion) projects such as roofs and balconies of buildings, and the easily permeable parts such as floor drains and pipes must be repeated (4-7Over) brush, it is about required per square meter.1.5-2Kilograms.



3. Wall waterproof

It is suggested that the thickness of waterproof layer is 0.8-1.2mm, and the permeable parts such as floor drain and pipeline must be repeated (4-7Over) brush, it is about required per square meter.1.2-2Kilograms.


4. Indoor moisture-proof


Indoor moisture-proof (no obvious water seepage) treatment, can add 1-2 times of water dilution, brushing1-2You can do it all over. About per kilogram can be painted2-5Square meters.




Note:Above the waterproof layer, cement mortar/anti-crack mortar protective layer shall be made. On a smooth cement plane, if the thickness of the waterproof layer is required to be1mm, then approximately per kilogram of area can be painted0.6About square meters. Because the actual construction amount is related to the construction technical level, the flatness of the construction surface, the ambient temperature, the product consistency (water dilution) and other conditions,Need to be flexible depending on the situation.Some wrong operations that are easily overlooked



Some wrong operations that are easily overlooked


Waterproof coating construction in addition to the brush is too thick/too thin, there are the following wrong operation will also affect the waterproof construction effect:

1. Roof base is uneven, The waterproof coating is not leveled before construction, resulting in uneven thickness of the waterproof coating and cracking in thick places.

2. Waterproof coatingWatering construction with watering method, resulting in uneven coating thickness.

3. Waterproof coatingThe base surface is not wetted before constructionThe base layer is too dry to cause bubbles in the coating.


4.Yin and Yang angle do not do arc transition,Lead to paint in the Yin Angle accumulation is too thick, cracking.



The coating thickness of the waterproof layer affects the waterproof age of the building, and the appropriate waterproof coating must be selected. During construction, neither "material reduction" nor blind "material addition!

The better, thickness, waterproof coating, brushing, waterproof layer, construction, waterproof, resulting in, approximately, not less

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