2. Check whether the external window is closed before watering.
3. The water spraying test can be carried out in sections. For high-rise and small high-rise residential buildings, spray pipes are generally hung for a water spraying section every 2-3 floors from top to bottom. The diversion pipes can be led out from the indoor and outdoor windows on the first floor of the drenching layer, and effectively fixed to ensure that the drenching pipes are not deformed (no less than 1 diversion pipes or fixed pipes are set every 2 meters); In order to ensure the pressure and water flow of spray water source, it is not advisable to set up multiple channels.
During the water spray test, it should be ensured that the middle and lower parts of each layer of outer window glass can form a continuous "water curtain" and cover the joint between the window and the wall.
4. Adjust the size of the control valve according to the instructions of the pressure gauge when spraying water. Generally, the water pressure at the farthest spraying point shall not be less than 1.5kg, and the pressure shall not be too high (it will not affect spraying). The amount of drenching water should be controlled at 3L/(m? . Min) above. When temporary water is used for water supply, and the water pressure cannot meet the test requirements, booster pumps and other methods should be used to ensure the water pressure. Ensure that a water curtain is formed on the surface of the external window wall. The continuous watering time should be no less than 1 hour each time, or insist on watering until serious leakage occurs.
5. After spraying water 1 hour, move to the next spraying layer. The technical personnel of the construction unit, the construction unit, the supervision unit and the external window installation unit will jointly observe and inspect the external window, and make eye-catching marks on the parts of the indoor and outdoor windows found to be leaking, damp and watermarked in the water spraying area. Make a detailed written record of the inspection. And fill in the inspection record of the external wall window water spraying test.
Cause analysis:
For the water seepage parts detected by water spray test, all parties must analyze the reasons and make rectification. After the rectification, the water spray test shall be carried out on the leaking part again as required until there is no leaking point. In the self-inspection stage of the project, all households should be investigated. Find out the cause of the leak,
For the quality defects found in the general survey, key inspections should be carried out. After the repair in construction, the water spray test should be carried out again. Through repeated tests, ensure that the waterproof quality of each outdoor window meets the acceptance standard.
In addition, the water drenching test should be carried out in time according to the time required by the owner, combined with the engineering characteristics, fully consider the uncertainty of quality factors, and do a good job in the observation of water drenching in all links.