● Whether it is cement mortar or fine stone concrete, the ratio needs to be reasonable, which is the basis to ensure its strength and rigidity.
● Need to compress and flatten the layer. When using cement mortar to level the level, the cement mortar should be washed twice after receiving water. Flat pressing and complete curing, there must be no brittleness, sanding and flaking. When fine stone concrete is used, a micro-expansion agent can be added to the fine stone concrete to improve the crack resistance of the leveling layer.
● In order to reduce the cracking of the leveling layer, it is recommended to set the roof leveling layer. The spacing of the leveling joints of cement mortar or fine stone concrete should not exceed 6m; when using asphalt mortar, the spacing of the separation joints should not exceed 4m.
● Highlight the intersection of the roof structure (walls, railings, deformation joints, chimneys, etc.) and the roof, as well as the details (water drops, mouths, trenches, ridges, etc.), which need to be curved.
● Before laying the roof moisture-proof layer or waterproof layer, the base layer needs to be clean and dry. The simple drying test method is as follows: put a 1 square meter roll on the leveling layer, let it stand for 3 to 4 hours, and then open it. If the horizontal coverage area and the coil do not see the watermark, it can be laid. Steam layer or waterproof layer.