The core conclusion is: Indoor wooden door installation requires focusing on pre-installation preparation, on-site standard operation, and post-installation inspection/adjustment to avoid problems like warping, jamming, or air leakage.
Check the door opening: Ensure the opening is square (vertical and horizontal angles are 90°), with no cracks or unevenness. The size should match the door leaf—reserve a gap of 2-3mm on both sides and 3-5mm at the bottom (for floor covering thickness).
Treat the opening environment: The wall and opening should be dry (moisture content ≤10%), especially for new houses. Avoid installing in humid environments to prevent the door core from absorbing moisture and deforming.
Inspect door and accessories: Check if the door leaf is flat, the coating is intact, and hardware (hinges, locks, door stops) is complete and undamaged. Confirm that the door frame’s wood texture is consistent and there is no warping.
Fix the door frame firmly: Use expansion bolts or wooden wedges to fix the frame to the opening. Space the fixing points 50-60cm apart, and reinforce key positions (hinge side, lock side) to prevent the frame from loosening or shifting.
Ensure verticality and levelness: Use a level to calibrate the door frame repeatedly. The vertical deviation should not exceed 2mm, and the horizontal deviation should be within 1mm—otherwise, the door will jam when opening/closing.
Control gaps reasonably: The gap between the door leaf and frame should be uniform (2-3mm on both sides, 3-5mm at the bottom). Too small a gap causes jamming; too large leads to poor sound insulation and air leakage.
Seal and waterproof: Fill the gap between the door frame and opening with foaming agent (choose waterproof, environmentally friendly types). After foaming, trim excess agent and seal the edge with neutral silicone to prevent moisture penetration.
Install hardware correctly: Hinges should be installed vertically and symmetrically, with screws fully tightened (avoid missing or loose screws). The lock body and bolt should align accurately—test opening/closing repeatedly to ensure smooth operation without jamming.
Test door operation: Open and close the door 10-15 times. It should be light and smooth, with no creaking, jamming, or rebound. The door lock should latch and unlock smoothly without tightness.
Check sealing and sound insulation: Close the door and observe if there is light leakage from the gaps. Press the door leaf gently—there should be no obvious shaking, and the sound insulation effect should meet expectations.
Protect the door after installation: Avoid hitting the door leaf or frame with heavy objects within 24 hours. Do not hang heavy items on the door handle to prevent deformation of the door frame or hinges.
Confirm after-sales service: Ask the installer to explain daily maintenance precautions (e.g., avoiding direct sunlight, wiping with a dry cloth). Keep the manufacturer’s contact information for follow-up adjustments if problems arise.
Do not install in humid environments (e.g., unventilated new houses, newly painted walls) to prevent door core moisture absorption.
Do not use excessive force when fixing the door frame—over-tightening bolts may cause the frame to deform.
Do not ignore gap adjustment—uneven gaps are the main cause of subsequent jamming and sound leakage.
