What are the causes of parapet cracking and leakage after roof waterproofing is completed, and how to prevent it?

First, the phenomenon: brick parapets are prone to inclined cracks in the shape of straight and inverted characters at the corners, and there are intermittent horizontal cracks at the intersection of roof ring beams; Vertical cracks often appear every few meters on the coping of parapet.

Second, cause analysis: 1) There is no gap between the roof structure layer and the parapet; 2) uneven settlement of foundation; 3) Poor design and poor construction quality 4) Cement mortar plastering cracks due to temperature difference.

III. Preventive measures: 1) For the bad foundation, reinforcement should be carried out: 2) Reduce the influence of restraint; 3) Strengthen waterproof treatment of detail structure 4) Reinforced concrete parapets should be adopted in important buildings. 5) Different construction measures should be taken in different areas.