Layering refers to the use of some strip-shaped objects to press on the edge for fixation in order to install something firmly. For example, when installing the glass in the wooden window, after the glass is installed in the frame, some wooden strips are nailed on the edge of the glass for fixation.

Generally used for the seam between the floor or door, because the wood floor is composed of blocks and blocks, in some cases there must be a large gap, for the sake of beauty, so lay a wooden strip on it.