Polyurethane waterproof coating is widely used in indoor and roof waterproof maintenance due to its superior waterproof performance. However, if you pay little attention during the construction process, it will greatly affect the construction effect of the material. Let’s share with you about the failure of polyurethane waterproof coating construction. The major reasons and solutions are expected to be used in future construction to avoid unnecessary mistakes.

1. Inferior materials: Because of the competition in the price of waterproof materials on the market, many polyurethane material manufacturers have cut corners on waterproofing materials and materials, which will cause the physical properties of the waterproofing materials to decline, resulting in waterproof failure.

2. There is water vapor on the bottom layer: Some polyurethane waterproof coatings are oily waterproof materials, so it is necessary to confirm whether the ground is dry before being applied. Otherwise, after the waterproofing is done, the water vapor is wrapped inside and converted into powerful steam by sunlight. It will cause the peeling of the polyurethane waterproof layer.

3. The bottom layer is not clean: Because before the waterproof construction, the ground must be clean, and try not to have dust and loose substances, otherwise there will be a phenomenon that the waterproof layer and the base layer are not firmly bonded, leaving a hidden danger.

4. polyurethane waterproof coating waterproof layer is too thin: polyurethane waterproof layer must reach a certain thickness to have a waterproof effect, because the polyurethane material itself still has low water absorption characteristics, if the thickness of the waterproof layer is insufficient, after a few days of heavy rain, rain through The polyurethane waterproof layer to the bottom, through the weather of the weather, will still produce water vapor at the bottom, causing the waterproof layer to peel off.It is best to apply a glass fiber mesh to all corners for reinforcement to prevent leakage of the polyurethane waterproof layer.

5. lack of construction experience: waterproof construction is best carried out by the waterproof professional construction team, can not go to the hardware building materials to buy some waterproof materials to paint.Before waterproofing, carefully determine the cause of the leak and solve it.

Solution: We must find a professional construction team to carry out the construction. As the saying goes, the construction of “30% materials, 70% construction” directly affects the waterproof effect.