Hi,
For a smooth door installation toronto:
Level and Alignment: Place the door in the frame and use a level to ensure it's plumb. Use shims between the door frame and the wall framing to adjust for level and alignment, focusing on hinge locations and the latch side.
Shims Placement: Insert shims at hinge locations and adjust until the door is level and swings properly. Secure the door by screwing through the hinge plates into the shims.
Sealing Gaps: Use foam or silicone caulk to seal gaps between the frame and wall. For larger gaps, use expanding foam or insulation tape before caulking.
Good luck with your installation!