1. Put the combined door frame into the door hole, adjust the gap between the sides and the top, use a wooden wedge to level and straighten the door frame.
2. For installation with expansion screws, use an impact drill to align the expansion screw holes on the side frame to drill holes on the wall, install the expansion screws and lock them; if install with fixed iron plates, align them with the reserved iron plates Drill holes, insert the gecko, and fasten with self-tapping screws.
3. Fill the gap between the wall and the door frame with styrofoam or cement paste.
4. After the styrofoam or cement paste is air-dried, remove the temporarily fixed wooden square and saw off the excess protruding wooden wedges.
5. Paste the front door frame line and the back door frame line on the door frame with universal glue. The corners must be cut at a 45-degree angle in the width direction. The front door frame line is 70MM, and the rear door frame line is 100MM, 150MM, 250MM and other specifications.
6. Use universal glue to paste the door cover line and insert it into the unique 3mm wide and 30mm deep groove on the door frame, and adjust the insertion depth according to different wall widths. When combining, the corners must be cut at a 45-degree angle in the width direction.
7. Directly use a nail gun to nail the door stop line to the door frame line. After fixing it, press the entry stop line buckle and mute bar. The fixed door stop line just presses the seam of the front and rear door frame lines. When assembling, the intersection angle must be cut at 45 degrees in the width direction.
8. Use Bi Lizhu to clean the construction surface. After the door opening is installed, prepare for the next door leaf installation.