1. Preparing the Installation Site

• Verify the door opening matches the pre-cut WPC door dimensions.
• Clear debris and ensure the floor/flooring is level.
• Check wall integrity; repair any uneven surfaces.

2. Installing Decorative Board Connectors

• Horizontal boards: Fix 2 connectors per piece.
• Vertical boards:
  • Up to 2400mm: 4 connectors per piece.
  • Above 2400mm: 5 connectors per piece.
• Critical note: For the latch-side jamb, ensure the smaller edge-to-hole distance faces outward.

3. Assembling the Main Door Jamb

1. Align the main jamb (latch side) and auxiliary jamb (hinge side).
2. Temporarily secure with a nail gun, then reinforce with 4×40mm self-tapping screws.
3. Use a level to ensure perfect vertical alignment, especially around the latch hole.

4. Installing the Door Jamb into the Opening

• Place the assembled frame into the opening.
• Leveling:
  • Top/bottom boards: Ensure horizontal with a spirit level.
  • Side boards: Check vertical and parallel.
• Reinforcement:
  • Insert wooden shims (4 per side, 2 at top) for stability.
  • Apply expanding foam sealant between the jamb and wall.
  • Cure time: ~20 minutes.
• Nailing:
  • Use a nail gun only in hidden areas (e.g., jamb junctions, hinge zones).
  • Avoid visible spots or screw holes.

5. Installing the Door Stop & Silencer

• Attach the door stop at jamb junctions using glue + nails.
• Leave a 3–5mm gap for the door leaf.
• Secure the silencer strip in its groove.
• Pro tip: Use temporary wooden braces to prevent frame warping during foam expansion.

6. Hanging the Door Leaf

1. Hinge Installation:
   1. Attach mother-son hinges to the door leaf (aligned with opening direction).
   1. Spacing:
      1. 1st hinge: 150mm from the top edge.
      1. 2nd hinge: 384mm below the first.
2. Gap Adjustment:
   1. Top: 3mm
   1. Sides: 3mm
   1. Bottom: 7mm (for ventilation/clearance).
3. Hang the door and test swing smoothness.

7. Installing Hardware

• Handles/Locks: Ensure precise alignment; tighten screws firmly.
• Concealed Floor Suction: Align with the door’s closed position.
• Final Test: Verify smooth operation of all components.

8. Cleanup & Inspection

• Remove shims, trim excess foam, and wipe down the door.
• Confirm no scratches or misalignments.