The correct construction method of waterproof coatings includes the following steps and precautions:
Preparation before construction
Cleaning the base layer: Before construction, it is necessary to clean the dust, dirt, oil stains, etc. on the surface of the base layer to ensure that the base layer is clean, flat, free of oil stains, cracks, sand and other defects.
Moistening the base layer: If the base layer is relatively dry, it is necessary to moisten the base layer with clean water to prevent the waterproof coating from cracking due to excessive water loss.
Ingredients: According to the mixing instructions provided by the manufacturer of the waterproof coating, mix the coating and water in proportion and stir evenly. Pre-coating: Apply a layer of pre-coating on the wall where waterproof coating is required to enhance the waterproof effect.
Construction steps First layer brushing: Apply the first layer of waterproof coating on the pre-coating. The brushing direction should be perpendicular to the pre-coating, and the brushing thickness should not be too thick. Second layer brushing: After the first layer of waterproof coating is dry, apply the second layer of waterproof coating. The brushing direction should be opposite to the first layer to enhance the waterproof effect.
Treatment of special parts: For special parts such as kitchens and bathrooms, special waterproof coatings need to be used for construction. For example, special waterproof coatings for the ground are used for construction on the floor, and special waterproof coatings for the wall are used for construction on the wall.
End treatment: The end of the waterproof coating should be sealed to prevent moisture penetration. Sealant, waterproof coating and other materials can be used for treatment.
Inspection and maintenance after construction
Water-tight test: After the waterproof coating is completed, a water-tight test is required to test the waterproof effect. During the test, it is necessary to observe whether there is any water leakage and deal with it in time.
Check the coating surface: Before the water-tight test, first check whether the coating surface is flat, and focus on checking the inner corners, outer corners, floor drains, pipe roots and other parts.
Drying time: About one day after the waterproof construction is completed, the water-tight test can be carried out after the waterproof layer is completely dry.
Common problems and solutions
Bubble problem: Bubbles cannot be wrapped into the coating when brushing. If bubbles are encountered, they should be eliminated immediately.
Thickness control: The thickness of the coating should be controlled at about 0.5mm to avoid being too thick or too thin.
Drying time: Each coat of paint can be applied only after it is dry to ensure that the coatings are firmly bonded.
