1. The surface uneven: under the condition of the ground not level off the shop floor, use after a period of time, floor glue off produce gap between; Sizing: less floor have central heating in winter, baking, air drying, the floor surface shrinkage, joint glue is insufficient, the strength is not enough, does make the floor glue produce crevices;

2. To have a heavy: need to repair the parallel to the opposite direction of the floor with heavy pressure, make the floor cannot free shrinkage, cracks; This room will be bulging phenomenon in the summer, and heating in the winter came and there will be a crack phenomenon;

Maintenance plan: pull down the floor, the ground handling after leveling, dry resurfacing; According to the size of the crack, decided to wax, back glue; With special tools or heavy; Remove the weight, glue fixed again.