Leakage of doors and windows, as a common problem in the quality of construction projects, has always been one of the quality issues affecting the use of construction projects, leading to complaints from owners and high repair rates. The following combination of years of engineering practice experience, and through investigations with material suppliers and door and window processing units, on the basis of careful analysis and study of the quality of doors and windows and leakage problems, the reasons for the leakage of building doors and windows project Analysis and how to effectively prevent:

Once the leakage problem of building doors and windows projects occurs, it is more tedious to carry out repairs. The first reason is that it is not easy to determine the location of water leakage, and the maintenance duration is relatively long. Second, it is not easy to repair once, and often requires multiple repairs, which will have a great impact on the daily life of the owners. Therefore, as a professional technician of the construction industry, we are responsible for summarizing and analyzing the leaks in the doors and windows of construction projects to find out the causes of the leakage problems, and conduct detailed measures from the aspects of design selection, material processing, and finished product installation. To strengthen the detailed quality management during construction, and really prevent and control the leakage problem from the source to ensure the quality of the project.

Causes for Leakage of Doors and Windows 1. Larger windows use larger pieces of single glass. There is no reasonable separation. With additional reinforcement frames, when the air pressure is high, the vibration of doors and windows leads to water in the profile gap, and the leakage of the doors and windows is caused by irrational design.

2. There are air bubbles and cracks in the sealant between the door and window frame and the door window wall. Some windows and doors are opened in winter. The sealant loses its adhesive strength and the seal is not leaking.

3. The on-site window frame is directly fixed on the heat preservation layer, and the water-proof strengthening treatment is partially adopted, resulting in leakage between the insulation layer and the wall of the door and the door after the storm.

4. Cracks in the splicing gaps of door and window frames, bolt holes are not glued, or glue is not dense, resulting in leakage.

5, hinge adjustment is not in place, the pvc rubber strip used is relatively poor flexibility, window sash processing deviation is greater, leading to a larger gap between the door and window frame and the door and window fan, leak tight seal.

6. There is no plastic seal between the door and window profile and the glass, and there is no glue seal between the gaps. Under the action of the wind pressure, the sealing between the profile of the door and window fan and the glass is not strict and leaks.

7. The drain hole is improperly set and part of the drain hole cover is closed under the wind pressure to close the drain hole, leading to flooding inwards.

8. There are empty drums, cracks, and sanding on some window sills, resulting in leaky seals. Some of the floating windows (window decoration effect map) have water in the roof, leakage, and flooding of individual windowsills, resulting in water retention, leakage.

Door and window leakage prevention measures 1. Before the installation of doors and windows, “three performances” witness sampling inspection shall be carried out. After installation, a qualified laboratory shall be commissioned to conduct on-site “water tightness” and “air tightness” inspections.

2. After the doors and windows are installed, a qualified inspection agency shall be commissioned to conduct on-site inspections in accordance with relevant regulations and procedures.

3. Check the size of the reserved wall hole before the door window frame is installed and fixed. The size of the door and window frame hole should be set too large and handled improperly, which will easily cause cracking and seepage. When the deviation is too large and the repair thickness is more than 50mm, the reinforced concrete mold should be used to repair the C20 fine stone concrete. When the repair thickness is less than or equal to 50mm, the waterproof mortar can be added to the steel wire to streak and roughen to repair the gap. In order to enhance the waterproof effect of the perimeter of the door frame, the waterproof mortar is applied to the masonry hole and then the outer frame is fixed. After the fixing, the outer frame and the wall are determined according to the decorative material.

4. The installation of doors and windows should be fixed with galvanized iron sheet. The thickness of galvanized iron sheet should not be less than 1.5mm. The spacing between the fixed points should be 180mm at the corner and not more than 500mm at the edge of the box. It is forbidden to use the long foot expansion bolts to penetrate the profiles to fix the door and window frames. Composite window splicing node should take the method of splicing surface.

5, door and window openings should be clean and dry after spraying foaming agent, foaming agent should be continuous playing, a molding, filling full, overflowing the door and window frame outside the foaming agent should be plugged into the gap before the conjunctiva to prevent the foaming agent outer membrane damaged. The sealing rubber strips of the inlaid glass should be appropriately lengthened by 20 mm according to the circumference, so that they are in a natural state and must not be tightened. The length of the brush strips must be in place.

6. 5mm wide rubber slot should be left outside the door and window frame.

7. The glue surface should be cleaned before it can be applied, and neutral silicone sealant should be used.

8. When the plastic door and window hardware is installed, the metal liner must be installed, and its thickness should not be less than 3mm. When tightening the installation, it must be drilled first and then screwed into the self-tapping screw. It is forbidden to hammer into it directly. The result of the prevention and control is that there are no leaks on the site.