The water pouring test simulates the rain mode and uses pressurized water to inspect the external doors and windows. Set up a horizontal sprinkler belt every 4-6 floors, and the sprinkler test time should not be less than 6 hours. When pouring water, horizontal pipes should be arranged on all walls to check for potential leakage hazards. When using temporary water for the water spraying test, it is necessary to ensure that the water pressure and continuous spraying time of the temporary water in the water spraying pipe meet the test requirements, and to ensure that the water flow rate on the bottom wall meets the test requirements. It is advisable to choose materials with good rigidity such as PPR pipes to make water inlet and outlet fittings. The water inlet pipe should be led out from the temporary water tank on the roof or the indoor and outdoor windows on the upper floor of the water outlet layer, and effectively fixed to ensure that the water outlet pipe does not deform. The diameter of the sprinkler pipe should be 20-25mm, and the distance from the window surface should be 100-150mm. The spray holes should be evenly distributed in a straight line, and the angle between the spray direction and the horizontal direction should be about 30-45 degrees. The diameter of the hole should be 2-3mm, and the distance between the holes should be 150-200mm. The water volume should be the maximum amount under normal water pressure of tap water or pressurized by a booster pump to ensure the formation of a water curtain on the outer window surface.

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After the external window is watered, the on-site engineer will enter the house at regular intervals to visually observe and inspect whether there is any leakage in the external window and its surroundings. Promptly mark the areas where water leakage, moisture infiltration, and water marks are found, identify the cause of the leakage, make detailed written records, and further arrange for rectification and re inspection. After summarizing and analyzing, the prevention and treatment of external wall leakage should focus on the following aspects:

Reason 1: The bottom of the peripheral filling wall has not been reinforced with concrete or laid with three layer solid bricks;

Preventive measures: Three layer solid bricks are installed at the bottom of the wall in the external window area

Preventive measures: Install concrete anti threshold at the bottom of the wall in the external window area

Reason 2: Rough and non-standard sealing of holes reserved for external wall scaffolding and I-beams;

Preventive measures: Use cement mortar to seal the screw joint of the external window, and then apply JS waterproof coating

Preventive measures: Use fine stone expanded concrete to seal the reserved openings and handholes on the exterior wall

Reason 3: The upper part of the window sill was not topped with 6CM concrete, but was built with solid small bricks;

Preventive measures: Pour 60mm thick concrete on top of the external window area

Reason 4: The 150mm high aluminum alloy window frame on both sides and the bottom frame are not sealed with cement mortar/concrete. There are fixed wooden wedges, small bricks, and foam glue at the bottom of the window frame; The 150mm high seam on both sides is not qualified; The closure between the window frame and the wall is not in place, rough, and has large gaps;

Preventive measures: The cement mortar joint between the aluminum alloy window frame and the wall should be in place, and the closure should be aesthetically pleasing

Reason 5: The glue around the window is not applied properly, and the sealant is rough, uneven, and peeling;

Preventive measures: Apply adhesive around the aluminum alloy window frame to ensure it is compact, straight, and aesthetically pleasing

Reason 6: There is no eagle beak/drip line or a sloping phenomenon on the eaves of the window; The window sill is not sloped or has a reverse slope phenomenon;

Preventive measures: The drip line/eagle beak on the eaves of the window should be properly made

Preventive measures: Set a slope outward from the window sill, in accordance with the drawing requirements, and ensure smooth drainage

Reason 7: The gaps between the aluminum alloy window frame profiles are large, and there are no drainage holes at the bottom of the frame. The joint parts of the profiles are not tight, and the gaps are large;

Preventive measures: The aluminum alloy window frame profiles are tightly jointed and equipped with drainage holes

Reason 8: The single-layer air conditioning panel on the south side has no slope or waterproof layer; There is water accumulation in the double-layer panel of the air conditioner, and no slope has been found. There are no drainage holes at the bottom of the louvers.

Preventive measures: The waterproof construction of single-layer air conditioning panels should be sloped in place without water accumulation. After waterproofing, apply mortar to create a slope protection layer

Preventive measures: Leave drainage holes in the bottom frame of the louver, and ensure that there is no accumulated water inside the double-layer air conditioning panel. After waterproofing, apply mortar to create a slope protection layer