Installing an interior door may seem simple, but it’s one of those projects where precision truly matters. Even a small mistake during installation can lead to uneven gaps, sticking doors, and long-term frustration. Here are the most common interior door installation mistakes we see in Toronto homes — and how to avoid them.

1. Incorrect Door Measurements

The most common issue starts before installation even begins — inaccurate measurements. A door that’s even a quarter inch too large or small can cause major alignment problems once installed.

  • Always measure the width, height, and depth of the existing frame (including jamb thickness).
  • Check if the frame is square using a level before ordering your new door.
  • For older Toronto homes, measure in multiple spots — walls and frames can shift over time.

Pro Tip: A professional installer can take precise measurements and account for uneven flooring or drywall thickness — small details that make a big difference.

2. Not Leveling the Frame Properly

An unlevel frame causes one of the most frustrating issues: a door that won’t close evenly or swings open by itself. This happens when the jamb isn’t plumb or the hinge side isn’t shimmed correctly.

  • Use a 6-foot level to ensure the jamb is perfectly plumb before fastening.
  • Install shims behind each hinge location for stability.
  • Secure the frame with finish nails only after confirming proper swing operation.

3. Over-Tightening Screws or Nails

Driving screws or nails too tightly into the frame or hinges can twist the jamb and affect the door’s movement. This can lead to a door that binds, rubs, or sticks along the top or latch side.

  • Fasten hinges securely but avoid overtightening — snug is enough.
  • Check that the reveal (the gap between the door and frame) stays even on all sides before final fastening.

4. Ignoring Wall and Floor Irregularities

Many older Toronto homes have slightly uneven walls or sloped floors. Ignoring these imperfections leads to misaligned doors, visible gaps, and poor seals.

  • Shim the frame carefully to compensate for uneven surfaces.
  • Always check swing clearance at both the top and bottom of the door.
  • Use flexible trim caulking to close small wall gaps for a clean finish.

5. Using Low-Quality Hardware

Cheap hinges, handles, and latch hardware can cause squeaks, loose fits, and faster wear. Investing in durable, high-quality hardware ensures smoother operation and longer lifespan.

  • Choose solid brass, steel, or heavy-duty hardware for better durability.
  • Match hinge quality to door weight — heavier doors need 3 hinges minimum.
  • Upgrade to soft-close hinges or magnetic latches for a premium finish.

6. Poor Finishing and Caulking

Even when installed perfectly, a door can look unfinished if the trim, casing, or caulking is rushed. Gaps, visible nail holes, or uneven paint lines can make a new installation appear sloppy.

  • Use high-quality filler and caulk for all nail holes and joints.
  • Sand between coats of paint for a smooth, professional surface.
  • Match trim color and sheen for a seamless look.

7. Skipping Professional Installation

While DIY installations might save money upfront, they often lead to uneven alignment, drafts, and premature wear. Professional installers have the tools and experience to ensure every hinge, reveal, and latch fits perfectly.

A small investment in professional installation saves time, prevents costly rework, and guarantees a longer lifespan for your doors.

Professional Installation Makes the Difference

With 25+ years of experience serving Toronto and the GTA, JK Luxury Home Remodeling specializes in precise, high-quality interior door installations. Every door is measured, leveled, and finished to perfection, ensuring a smooth swing, tight seal, and long-lasting performance.

📞 Contact us today or Request a Free Estimate for professional door installation services in Toronto, Mississauga, Vaughan, Markham, and Richmond Hill.

Final Thoughts

Even the best doors can fail without proper installation. Avoiding these common mistakes ensures your doors look great, function flawlessly, and last for years to come. Trust the professionals at JK Luxury Home Remodeling for results that combine craftsmanship and attention to detail.