How to install timber doors

🪚 How to Install Timber Doors — Professional Joinery Guide

What is involved in installing a timber door professionally?

Installing a timber door correctly is a core joinery task that directly affects clearance, operation, latch engagement, acoustic performance and long-term stability. On Australian new builds and renovation projects, the key to a professional result is accurate opening assessment, controlled trimming, precise hinge gains, and correct hardware alignment to suit the jamb, floor finish and seasonal movement.

This guide covers standard internal timber door installation into a prepared jamb, with notes relevant to common site conditions including out-of-square openings, existing frames and renovation clearances. Work should align with manufacturer specifications and applicable tolerances, with framing and openings generally assessed in accordance with AS 1684 Residential Timber-Framed Construction where relevant.

What skill level is required to install timber doors?

Intermediate — Estimated time: 2–4 hours per door

What tools are essential for timber door installation?

What materials are needed for a standard timber door installation?

Safety Requirements

Step-by-Step Guide

Step 1: Assess the opening and confirm door suitability

1️⃣ Check opening condition

Inspect the jamb for plumb, level and wind. Measure the opening width at head, mid-height and bottom, then measure height on both sides and through the centre. Check diagonals to identify whether the frame is out of square.

For a professional fit, confirm the required clearances before trimming the door. Typical internal clearances are commonly:

On renovation work, account for existing floor coverings, future carpet, tile build-up or uneven timber floors. If the door is prefinished or veneered, verify maximum allowable trim with the manufacturer before cutting.

💡 Where the jamb is significantly out of plumb, correct the frame first rather than trying to force the issue through uneven door margins.

Step 2: Set out the door leaf and mark trimming lines

2️⃣ Mark to finished size

Transfer opening measurements to the door leaf, allowing for consistent margins. Mark the top edge clearly and confirm handing before any machining.

If trimming is required:

Use a straightedge and marking knife for clean cut lines, especially on veneered doors. If using a circular saw or track saw, apply masking tape over the cut line to minimise breakout.

Seal any exposed timber or engineered core after trimming.

Step 3: Trim and true the door

3️⃣ Cut and plane accurately

Place the door on stable supports and cut to the marked size. Use:

Maintain a slight back-bevel on the latch side, typically around 2 mm across the thickness if needed, to prevent binding as the door swings closed. This is particularly useful where jambs are not perfectly square.

Check the cut edges are straight and square unless intentionally introducing a slight bevel. Re-test the door in the opening before machining hinge gains.

💡 A clean, straight trim saves time later. Do not rely on hinge adjustment to correct an oversized or winding door leaf.

Step 4: Set out hinge positions

4️⃣ Mark hinge locations

Standard internal hinge positions are commonly:

Match existing jamb hinge positions exactly on replacement work unless the frame is being re-machined. Mark hinge positions on the door edge and transfer them to the jamb using a knife line for accuracy.

Confirm hinge thickness and leaf width before cutting gains. Poor set-out here will cause misalignment, twist and uneven margins.

Step 5: Cut hinge gains in the door and jamb

5️⃣ Rebate hinges cleanly

Use a router with a hinge jig for consistency, or chop gains by hand with sharp chisels. The gain depth should equal the hinge leaf thickness so the hinge sits flush with the timber surface.

Avoid over-depth gains. If the hinge sits too deep, the door can bind at the stop or throw margins out across the frame. If too shallow, the hinge knuckle will hold the door off and create inconsistent gaps.

Test-fit each hinge in its gain before fixing. Pre-drill all screw holes to reduce the risk of splitting, especially in hardwood species.

💡 On painted joinery work, knife the perimeter of the gain before routing or chiselling to keep arrises clean and reduce fibre tear.

Step 6: Fix hinges to the door first

6️⃣ Install hardware to the leaf

Screw the hinges to the door using the manufacturer’s supplied screws or upgraded screws of the same gauge and finish if required. Start with one screw per leaf to allow minor adjustment, then fully fix once the fit is confirmed.

For heavier timber doors, use 3 hinges as standard practice. Solid core doors, oversized doors and high-traffic applications benefit from the added support and reduced long-term sag.

Check all hinge knuckles are aligned and free-moving before hanging.

Step 7: Hang the door in the jamb

7️⃣ Lift and support the door

Use wedges, packers or a door lifter to hold the leaf at the correct bottom clearance. Present the door to the jamb and fix the top hinge first, then the bottom, followed by the middle hinge if fitted.

Open and close the door through its swing and inspect:

If needed, adjust by:

Do not proceed to lock preparation until the door swings freely and closes with even margins.

Step 8: Mark and fit the latch or lockset

8️⃣ Prepare lock furniture accurately

Mark latch height to project specification or match existing doors, commonly around 900–1050 mm above finished floor level depending on the job standard.

Drill the lock cross-bore and latch bore to manufacturer dimensions. Keep drilling square from both faces where necessary to avoid breakout and misalignment. Fit the latch body, then rebate the faceplate flush into the door edge.

Install the handle set or knob set and test operation. The latch should retract fully and return freely without binding.

On high-finish joinery, protect the door face during drilling to avoid surface bruising from the hole saw arbor or chuck.

Step 9: Set and fit the strike plate

9️⃣ Align latch engagement

Close the door against the stop and transfer the latch position to the jamb. Mark the strike accurately so the latch enters cleanly without lifting or pulling the door.

Mortise the strike plate flush, then drill or chisel the keeper recess deep enough for positive latch engagement. Fit the strike and test for smooth closing action.

The door should close with light, even pressure. If the latch is too tight against the strike, adjust the plate position or keeper tab rather than forcing the door shut and risking long-term wear.

💡 A poorly aligned strike is one of the most common causes of call-backs on otherwise well-hung doors.

Step 10: Final adjust, seal and finish

🔟 Complete final tuning

Check all margins again after hardware is fitted, as the door can settle slightly once fully loaded. Tighten all hinge screws and replace one screw in the top hinge jamb leaf with a longer fixing if extra pull-in is needed and substrate allows.

Seal or prime all cut edges, gains and drilled penetrations. This is particularly important on bathroom, laundry or coastal projects where moisture movement is a concern.

Complete finishing as specified:

Confirm final operation, stop contact and latch function before handover.

Common Mistakes to Avoid

Pro Tips

Recommended Tools

🔧 Recommended Tools