The term references a specific notched tool used for applying thin-set mortar when installing a Schluter-DITRA uncoupling membrane, commonly found at a major home improvement retailer. This implement is designed with particular notch dimensions to ensure the correct amount of mortar is applied, facilitating proper bonding between the substrate and the membrane. For example, a 1/4″ x 1/4″ square-notched tool is often specified for DITRA installations.
Correct application of the mortar is vital for the successful performance of the DITRA system. Insufficient mortar can lead to a weak bond and potential failure of the flooring installation, while excessive mortar can hinder the uncoupling function of the membrane. The availability of this specialized tool at a widespread retail location simplifies the process for both professional installers and DIY enthusiasts, contributing to broader adoption of the DITRA system in tile flooring projects. The system itself revolutionized tile installation, moving away from traditional methods which were prone to cracking as the subfloor shifts.
