What are the disadvantages of PVC waterstop

※PVC waterstop is not as elastic as rubber waterstop: it may not perform as well as rubber waterstop when adapting to large deformations. PVC waterstops are prone to deformation when subjected to compression or tension, which affects the waterproof performance of the material. For example, in buildings in earthquake prone areas, rubber waterstops can better cope with possible large displacements.

※Environmental impact on lifespan: Due to the influence of external environment during use, the lifespan of PVC waterstops may not be very long.

※Poor cold resistance: It is easy to harden and become brittle in low temperature environments, which may affect the waterproofing effect.

※In projects in cold regions, if the temperature is too low, the performance of PVC waterstops may be limited to some extent.

※The bonding strength with concrete is relatively weak: the thickness of PVC waterstop is thin, so its strength is weaker. During construction, mortar should be used as a protective layer to prevent the PVC waterstop from being damaged in the next step of construction. In environments with high acidity and alkalinity, PVC waterstop is prone to erosion and water leakage.

※High price: The high cost of PVC waterstops results in higher construction costs per unit area compared to rigid waterproof materials, making them not economically practical in some low-cost projects.

※Although PVC waterstop is easy to construct, it has very high requirements for the waterproof base layer. Usually, it can only be constructed on a flat and smooth base layer with a moisture content of less than 9%, otherwise it is prone to bulging or layering. If the construction base is made of cement, the bonding between PVC waterstop and it will be inferior. It is not easy to use PVC waterstop on the exterior wall facade during construction, and a mesh needs to be hung to ensure that the wall will not fall off.