What does "mortar bed" refer to in a tiling context?

In the context of tiling, a "mortar bed" specifically refers to a layer of mortar that is applied to the substrate prior to the installation of tiles. This layer serves multiple important purposes. Firstly, it provides a flat and even surface for tile placement, which is crucial for achieving proper alignment and avoiding unevenness in the final surface. Secondly, the mortar bed acts as an adhesive, ensuring that the tiles adhere securely to the substrate, which helps to prevent shifting or cracking over time.

Utilizing a mortar bed can be particularly beneficial when tiling irregular surfaces or when laying larger tiles that require a solid and stable base. This method is often preferred in professional installations because it offers better support and longevity for the tilework.

The other options refer to different aspects of tiling that do not relate directly to the initial preparation and installation process. Therefore, the definition of a mortar bed aligns squarely with best practices in tiling, making it a fundamental concept in the preparation work that precedes tile installation.