Is it better to use tile glue or hang buttons to stick the facade wall tiles (400x800)?

Use tile adhesive. In particular, most of the tiles used for decoration and tiling now have low water absorption. If the tiles are still pasted with traditional paving materials, they will fall off easily. It is recommended to use ceramic tile adhesive, especially paste ceramic tile adhesive (please refer to brands such as Xiajianke and Datang Yipin).