Interior Door Installation in Ottawa
A typical interior door installation starts with the opening, frame and floor. Fit, hardware and trim shape the scope.
What Measurements Are Needed to Replace an Interior Door?
Direct answer
For an initial interior-door assessment, record the existing slab’s width, height and thickness, the visible frame dimensions, swing direction, hinge side and hardware locations. Add photos of the casing and clearance above the finished floor. These homeowner measurements help define the likely scope; they are not final ordering or installation dimensions. A slab replacement and a prehung replacement use different references, and the actual frame condition must be checked before choosing either.
Renovation1.ca · Published
| Item | What to know |
|---|---|
| Slab | Measure the moving leaf, including thickness, and identify existing alterations. |
| Frame | Distinguish the jamb opening from the outside of decorative casing. |
| Before ordering | Have product fit, final dimensions and the replacement method confirmed. |
Record the leaf without guessing from a label
With the door accessible, note its width and height at more than one point where practical, plus thickness at an exposed edge. Use consistent units and label every measurement. Mention any cut-down bottom or visibly uneven edge. A nominal product size or old invoice is useful context, but may not describe the door currently installed.
Separate the different opening measurements
Photograph and record the visible space inside the frame, making clear where the tape starts and stops. Decorative casing surrounds the jamb and is not the same as the structural rough opening, which may be concealed. Do not remove trim just to complete an initial enquiry. The installer can decide what additional access is needed for final measurement.
Show swing and hinge details clearly
Take a photo of each side with the door partly open and identify which room it swings into. Include hinge side, number, shape and positions. Handing terminology can be misunderstood, so a simple sketch and photos are useful alongside the description. JELD-WEN’s slab instructions check existing-jamb suitability; matching a hinge location alone does not establish a correct fit.
Document the hardware and surrounding finish
Photograph the latch edge, handle or lock holes, strike and any unusual hardware. Say whether the handle will stay or be replaced. Record visible casing width and describe its profile and finish, especially if a new frame is being considered. A replacement may require hardware preparation or trim repair even when the leaf dimensions appear to match.
Include the finished floor and operating clearance
Show the space under the door and note where it rubs, if it does. Identify planned flooring or a thick transition that could change clearance. Rugs and thresholds also affect operation. Do not select a trimming allowance from another door model; the product construction and instructions determine permitted alterations, and final fit must be checked in the actual opening.
What Renovation1 checks
We would use the preliminary dimensions and photos to distinguish likely slab fitting from frame replacement, then confirm alignment, dimensions, support and product compatibility on site as needed. If the opening itself changes, assess that as separate work. Ask the estimate to include hardware, casing and finish boundaries so the measured replacement is also a complete installation scope.
What Renovation1 does in practice
Send a labelled sketch with units and photos of both sides, hinges, latch, casing and floor gap. Mark uncertain measurements and include the proposed door link. Do not place a final order solely from these preliminary notes.
Sources
Related service
Project examples
Related homeowner questions
Homeowner guide
Do I Need a Permit to Replace a Door or Window in Ottawa?
How an existing opening, a structural change, and heritage status affect the questions to confirm before replacement.
Homeowner guide
Should I Install a Slab Door or a Prehung Door?
Compare keeping the existing frame with replacing the door and jamb assembly, including the fitting and finishing work.
Homeowner guide
Does My Door Need Replacing or Is the Frame the Real Problem?
Trace rubbing, latch trouble and drafts to the leaf, hinges, frame or surrounding opening before ordering a replacement.
Estimate
Planning a similar project?
Send photos and project details to clarify the scope and next step.
Send your door measurements for an estimate