Hanging and Aligning the Door Leaf on Site: A Practical Guide

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Hanging and aligning a door leaf means setting the frame plumb, level and square, then fitting the leaf so its gap and hinge line are even all the way up. Check alignment at the frame, the hinges and the closing edge before fixing anything permanently. Small adjustments made early prevent sticking, rubbing and uneven gaps later.

Start with an accurate on-site measurement

Before any leaf is hung, confirm the opening against the approved drawing and written specification. Measure width and height at three points each, and check the diagonals to see whether the opening is square. Note any out-of-plumb walls, uneven floors or thresholds that will affect the final fit.

Compare these readings with the leaf dimensions supplied from the factory. If the opening differs from the drawing, stop and report it, because a leaf made to measure cannot be trimmed properly on site without losing its finish and structure.

Plan the hinge line and the gap

Mark the hinge positions on the frame and the leaf before drilling. Keep the same offset from the top and bottom of the leaf so the load is shared evenly. The clearance around the leaf should be consistent on the hinge side, the lock side and the head.

Mark the hinge centres from the drawing
Check the planned clearance at the floor and the head
Confirm the swing direction and handle side

Fit and fix the frame

Set the frame plumb and level, then shim it at the fixing points so it does not twist when the wall fixings are tightened. Check the diagonals again after each fixing. A frame that moves during fixing will carry that error into the leaf.

Only fix the frame permanently once it is stable. Keep the shims close to the fixings to avoid bowing the profile.

Hang the leaf and set the hinges

Lift the leaf onto the hinges with a helper, keeping it supported until the pins are seated. Do not force the leaf into position with the handle or the locking edge. Tighten the hinge screws gradually so the leaf stays aligned as the fixings take load.

Quick checks while hanging

The leaf moves freely without binding
The hinge pins are fully engaged
The leaf is not carrying weight on the lock side

Align the leaf and check the gaps

With the leaf hung, check the gap at the hinge side, the lock side and the head. The gaps should be even along the full height. Use the hinge adjustment where the design allows it, making small changes and rechecking after each one.

Close and open the leaf several times. It should close smoothly and latch without lifting or dropping. Watch for rubbing at the top corner on the lock side, which often indicates the leaf needs slight adjustment rather than planing.

Final inspection before finishing

Once the leaf is aligned, confirm the locking hardware engages correctly and the seals sit evenly. Check that no finish has been scratched during fitting and that any touch-up is done in the same finish as the leaf.

Record the final readings and any adjustments in the installation notes, so the next visit or the building committee has a clear reference.

Frequently asked questions

What is the most common cause of a door leaf not aligning?

The frame is usually the cause, most often because it was fixed while out of plumb or twisted. Check the frame square and level before adjusting the leaf.

Should I trim the leaf if it rubs on site?

Avoid trimming if possible, because cutting can damage the finish and the structure. First try hinge adjustment and confirm the frame is stable, then consult the factory if the issue remains.

How do I check that the gap is even?

Use a feeler gauge or a set of spacers at the hinge side, lock side and head. Compare readings at several heights to confirm the gap stays consistent.

When should the frame be fixed permanently?

Only after the frame is plumb, level and square, and the leaf has been tested for free movement. Fixing too early can lock in errors that are hard to correct later.

Common mistakes to avoid

Fixing the frame before checking it is plumb and square, and forcing the leaf to close instead of correcting the hinge line. Both lead to rubbing, uneven gaps and early wear.

Our recommendation

Hang the leaf before the final wall finish is complete, so you can confirm alignment and adjust the hinges while everything is still accessible. Keep a record of the readings so any later adjustment is quick.

Summary

Accurate measurement, a stable frame, careful hinge setting and a clear gap check give a door leaf that closes smoothly and lasts.

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