before you begin install your doors :
1， prepare your material and tools .
2， measuring your structure opening size .
3， Assemble doors and frames.and find out RH and LH side .
installing into the hole and set door .
1, head right with left ,fix to the wall .
2，Use spacers to adjust the levelness.
3，glue and expansion bolt fixed .
4， casing and architrave cover .