A. cause analysis:

1. the slope of the slope of the slope of the roof, tiger window and roof connection, in this part of the reinforcement is insufficient, can not meet the stress and deformation requirements.

2. Improper structural design.In order to pursue the type of building, the flooding height is excessively reduced, so that the roof and roof connection, roof and wall at the junction of the waterproof height, lower than the instantaneous water under the rainstorm height, is to form a big hidden danger of roof leakage.

3. corrugated tile roof is suitable for the roof waterproof rating is class Ⅳ industrial and civil buildings, is not suitable for senior house and villa, application do not match.

4. corrugated tile tile paste is not true.Insufficient size of lap joints, resulting in roof rainwater infiltration into the base.Cracks appear in the concrete slab, which can easily lead to leakage.

5. Improper selection of slump in construction of cast-in-situ reinforced concrete slab.If the water-cement ratio is too large, the concrete will produce more fine water channels and the impermeability will decrease.They are also prone to fractures.Water - cement ratio is too low, easy to produce honeycomb and other defects.The above situation directly affects the waterproof performance of roof structure.6. Improper construction methods.Inclined roofing slope in more than 30 °, still using the plate bottom shuttering method placing, is easy to cause the construction quality accident, such as local thickness does not meet the design requirements, the structure cracks;The reinforcement is not in place, the negative reinforcement is easy to be tramped low, can not resist the bending moment with the concrete, and make the plate cracks;Concrete vibration is not solid, is also the hidden danger of roof leakage.

B. treatment plan

1, wave tile and cement mortar base bond is not strong, empty drum, cracking maintenance.First of all, remove the empty drum tile and cement mortar, clean the base, rinse clean, brush the corresponding waterproof coating film or brush the polymer cement paste after the batch wipe polymer cement mortar.At the same time, the Po tile re - shop, do a good job lap joint, lap joint gap seal materials.

2, the roof slope joint, tiger window and roof joint leakage repair practice is to take the place of the wave tile, the corresponding waterproof coating film or polymer coating on the basic level (should be based on the original roof waterproof level), and do a good lap and close the head, the joint with synthetic polymer elastic sealing materials sealed.Then spread or fixed tile, tile joints with sealing materials sealed.

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