When it comes to the overall construction market, the quality of current building projects has generally improved. However, during inspections and acceptance of residential buildings, there are still many quality issues in door and window installations that directly affect their functionality and performance. The reputation of the construction company also plays a significant role in determining the quality of residential projects. Here are some professional insights on the quality of door and window works and preventive measures:
First, Wooden Door and Window Projects
Wooden doors and windows are widely used in construction due to their availability and ease of installation. To ensure durability and quality, wood species, material grades, and moisture content must be strictly selected according to construction specifications. If necessary, raw materials should be dried in a drying room before use. Anti-corrosion, insect-proof, and fire-resistant treatments should also be applied as per design requirements. It is essential that the door frame and the groove of the panel fit tightly, with cement used to secure them and rubber wedges for additional support. The surface should be smooth, free from defects, with straight corners and accurate cuts, ensuring tight seams. After installation, the wooden doors and windows should be immediately coated with dry oil to prevent moisture-related deformation.
Common Quality Issues
1. The vertical deviation of the door frame is too large, causing warping or deformation. The diagonal difference is poor, the joints are not tight, and the wood may have planing marks or burrs. The kerf (cut) is not flat. 2. The position of the hinge is inaccurate. Hinge grooves vary in size and depth, edges are uneven, and wood screws are often over-tightened or improperly placed. 3. The vertical and horizontal seams are too wide, making the door or window difficult to open or close. Some doors may not close properly, leading to rebound, instability, or misalignment. The wind hook’s size and angle are not correct. 4. The window frame is not raised properly, with the lower frame embedded in the window sill plaster, affecting aesthetics. As the mortar dries, cracks may form, increasing the risk of water leakage. 5. Poor maintenance leads to uneven appearance, especially on the lower frame of the window, which often lacks proper corner treatment.
Preventive Measures
1. Strict quality inspection and evaluation should be conducted according to construction standards. Only qualified materials should be used, and all work should follow the same batch to avoid inconsistencies. 2. Hardware hinges should be aligned based on the model to ensure uniform groove size and depth. Hinges should be positioned at the top of the door or window, at 1/10 the height from the bottom or at the center of double hinges. Edges must be neat, and wood screws should only be partially driven in before being tightened. 3. The door or window panel should move smoothly and remain stable without rebound or misalignment. Hinge positions must be precise, and the core of the hinge should be straight. Wood screws should be aligned and not twisted. Gaps at the edge should be left, and seams should be tightly closed. Do not adjust the seam width by smashing the head. The fan should open at an angle of 23 cm from the side wall. 4. The lower frame of the window should be raised above the window sill. After applying cement mortar, the top of the slope and the lower frame should be at least 8mm high, with a slightly recessed arc to ensure proper drainage and prevent water infiltration. The side frame and upper/lower frames should be tightly sealed. 5. Proper maintenance of finished products is crucial. Avoid touching the door or window frames, and do not place scaffolding or tools directly on the frames without protection.
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