In order to increase the stability of the paste, the embedded part of the T-shaped metal trim is usually designed in various barb or zigzag shapes. In the whole house customization, customized products such as door panels and cabinet doors are combined with aluminum T-shaped to increase the texture of customized products and highlight the style effect. Generally, the threshold of the room will also use aluminum T-shaped, and the floor paving materials have a certain expansion rate (wooden floors are especially prominent), so it is necessary to reserve a certain distance for the floor expansion joints at the threshold to prevent the floor from expanding. The back is arched and warped, and the aluminum tile trim can perfectly cover the expansion joint of the door to achieve the effect of modifying the ground.