Why is a cleavage membrane used in flooring installations?

A cleavage membrane is utilized in flooring installations primarily to isolate the mortar bed from the substrate beneath. This separation is vital as it allows for movement and helps prevent any moisture or other materials from the substrate from affecting the mortar bed. By doing this, the cleavage membrane protects the integrity of the flooring installation, ensuring that it remains stable and free of potential issues that could arise from direct contact with the substrate. The use of a cleavage membrane can also facilitate proper drainage of moisture that may accumulate within the mortar bed, preventing damage to the flooring material over time and contributing to a longer-lasting floor.

While other benefits such as improved insulation, soundproofing, and adhesive strength may be relevant to flooring in general, they do not specifically pertain to the primary function of a cleavage membrane in this context. The distinctive purpose of the cleavage membrane as a barrier for the mortar bed makes it a critical component in many types of flooring installations.