How to Fit a Concealed Rose Door Knob

Author: Carl Benson

Carl is the founder of Suffolk Latch Company, with a background in engineering and over 20 years’ experience in home hardware. He works closely with suppliers and designers alike to develop quality ironmongery that stands the test of time. Read my full bio.

How to Fit a Concealed Rose Door Knob

Fitting a concealed rose door knob is all about accurate marking and careful alignment. The visible result looks simple, but the spindle, latch and two concealed rose plates all need to line up properly for the knobs to turn smoothly.

This guide explains how to fit Suffolk Latch Company’s concealed rose door knobs, using Carl’s fitting video as the practical companion. It covers measuring the latch backset, marking both sides of the door, fitting the concealed plates, trial-fitting the second side and checking the final operation.

This article focuses on fitting the door knobs and concealed rose plates. It does not cover fitting the tubular latch from scratch. If you are also fitting the latch, read our guide to How to Fit a Tubular Latch first.

The method is relevant to concealed rose products such as our Beehive Door Knobs, Solid Brass Beehive Door Knobs and Hammered Reeded Door Knob, where the product uses the concealed rose fitting method.

Table of Contents

Before You Start

Before fitting the knobs, check that your latch is suitable for the door knob set. The demonstration uses unsprung concealed rose knobs with a heavy-duty tubular latch. With unsprung knobs, the latch provides the return action, so the latch needs enough spring strength to return the knobs properly after use.

You should also check that the door is suitable for the hardware. The fixing points for the concealed plates need to bite into sound timber or the correct fixing area of the door. If you are working with a hollow or lightweight door, check the door construction and fitting position before drilling.

The most important point is this: measure your own latch before marking the door. Do not copy a measurement from a video, product page or guide unless it matches the latch you are actually fitting.

Watch the Fitting Video

Carl’s fitting video shows the practical process from preparation through to final operation. The written steps below follow the same general sequence and explain the key points to watch for.

Captions have been requested in the embed where an English caption track is available. If captions do not display automatically, use the YouTube controls on the video player.

Tools and Small Parts

Before starting, lay out the parts and keep the small components together. A small container is useful for screws, grub screws, spindle parts and the Allen key.

The demonstration uses tools for measuring, marking, aligning and fixing the concealed plates. These include measuring tools, a square, pencil, centre punch, clamp, drill, self-centring pilot bit, screwdriver, Allen key and brush. Tool sizes are not covered in this guide.

If your door knob set includes multiple spindle options or small threaded parts, keep everything organised before loosening grub screws or separating the concealed components. This reduces the chance of losing a small part during the fitting process.

Measure the Latch Backset Before Marking

The backset is the distance from the front face of the fitted latch faceplate to the centre of the square spindle opening. It is not the same as the full latch case length.

Before marking or drilling, measure the backset of your own latch. Fit the separate latch faceplate before taking this measurement, because the faceplate forms part of the final front face of the latch.

In Carl’s video, the demonstration latch measures 82.5 mm from the front face of the assembled latch faceplate to the centre of the spindle opening. This 82.5 mm measurement applies only to the latch used in that demonstration. It should not be treated as a universal measurement for all latches or all 4-inch tubular latches.

If you are unsure about backset, read our guide to Door Knobs and Backset Explained before marking the door.

Mark the Spindle Centre on Both Sides

Once you have measured the latch backset, transfer that measurement to the door. The centre of the spindle needs to align with the latch spindle opening.

Use a square to mark a clean horizontal reference line. In the demonstration, Carl chooses the centre of the cross rail on the door, but you should mark the correct position for your own door and latch.

Mark the backset carefully from the front edge of the door. Check the final mark rather than relying on a rough pencil line. A small marking error can affect the position of the concealed rose plate and may cause the knobs to bind later.

The spindle centre must match on both faces of the door. Mark both sides carefully rather than assuming that one side will automatically transfer accurately to the other.

Working Around an Existing Spindle Hole

If the door already has a spindle hole, marking the exact centre can be harder because the centre point may be missing. Do not assume that an existing hole is automatically suitable for the new concealed rose knobs.

In the video, Carl uses a practical marking aid matched to the rose, with centre reference marks that help position the plate around the spindle centre. This is a homemade aid used for the demonstration, not a supplied accessory.

Where an existing hole is present, use reliable horizontal and vertical reference marks and check the measured latch backset carefully. The concealed plate still needs to sit correctly around the spindle position, and the fixing holes need to clear the latch body.

Check Fixing Clearance

Before drilling pilot holes for the concealed rose plate, check where the fixings will sit in relation to the latch body. Some fixing points may line up close to the latch case, so it is worth checking before committing.

The demonstration discusses fixing positions and the relevance of bolt-through openings in the latch body. Your own latch may differ, so check that the fixing positions you use are suitable for your hardware.

This guide does not give a universal fixing count or screw specification. The important point is to make sure the concealed rose plate can be secured properly without the fixings clashing with the latch body.

Fit the First Concealed Rose Plate

Position the first concealed rose plate over your marks and check the alignment carefully. A clamp can help hold the plate steady while you start the fixing process.

Use a centred pilot hole through the plate’s existing countersunk fixing hole to reduce drill wander. Fit one screw first, then re-check alignment before adding another fixing.

Once you are happy with the position, complete the remaining suitable fixings for that side. Clear away dust and debris before assembling the threaded parts shown in the product demonstration.

The purpose here is not speed. It is accuracy. If the first plate is not aligned correctly, the spindle and opposite rose are more likely to sit at an angle.

Trial Fit the Opposite Side Before Final Fixing

This is one of the most important stages of the fitting process.

Position the second concealed rose plate and secure it lightly with one screw first. Pass the spindle through and trial-fit the knobs before completing the remaining fixings.

This trial fit gives you a chance to check that the two sides are aligned and that the spindle runs cleanly through the latch. If a small adjustment is needed, it is much easier to make it before every fixing has been tightened.

Once the knobs have been trial-fitted and the alignment is correct, remove the trial-fitted parts as needed and complete the remaining fixings for the second concealed plate.

Assemble the Knobs and Roses

With both concealed plates fixed, assemble the knobs and roses according to the product instructions. Make sure the grub screws are clear before pushing parts together, and align the grub screw with the recess in the spindle where applicable.

If you feel resistance, do not force or hammer the components together. Stop and check the alignment, the spindle position and whether any small part has been tightened too early.

In the demonstration, Carl recommends placing the access hole underneath where possible, then seating the visible rose against the door face and tightening the grub screw onto the spindle. This helps keep the visible fixing access discreet while still securing the knob as demonstrated.

Check the Door Knob Operation

Once both sides are assembled, test the knobs with the door open. Turn each knob and check that the latch retracts and returns cleanly.

If the knobs grind, bind or fail to return properly, do not force them. Re-check alignment first. A spindle running at an angle can cause poor operation, especially where the two rose plates are not lined up cleanly.

After checking the action with the door open, close the door carefully and check that the latch engages with the keep or strike plate. If the latch does not engage properly, that may relate to the latch or strike plate position rather than the concealed rose knobs themselves.

Useful Video Timestamps

Use these points in the video to find the main fitting stages quickly:

• 0:46–2:30: Parts, small components and preparation.
• 2:45–4:10: Tools and marking aid used in the demonstration.
• 4:10–5:01: Measuring the latch backset.
• 5:01–7:24: Marking the spindle position on the door.
• 7:24–8:37: Working around an existing spindle hole.
• 8:37–9:41: Checking fixing clearance around the latch.
• 9:25–12:30: Fitting the first concealed rose plate.
• 12:30–13:26: Trial-fitting the opposite side.
• 13:26–15:25: Assembly stage.
• 16:12–17:06: Final operation check.

Related Products and Guides

Products shown or supported by this fitting method include:

• Beehive Door Knobs
• Solid Brass Beehive Door Knobs
• Hammered Reeded Door Knob

These related guides may also help before fitting:

• How to Fit a Tubular Latch
• Door Knobs and Backset Explained
• Door Knobs Explained
• How to Choose Door Knobs

Conclusion

Fitting concealed rose door knobs is a careful marking and alignment job. The most important step is to measure the backset of your own latch before marking the door. Do not copy the 82.5 mm measurement from the video unless your own latch measures the same.

Once the latch position is understood, take time to mark both sides accurately, check fixing clearance, secure the first concealed plate, trial-fit the second side and only then complete the final assembly.

If the knobs turn smoothly and the latch returns cleanly from both sides, the fitting is working as intended. If the action feels tight, stop and re-check alignment before tightening or forcing anything further.

FAQ

Do I need to measure my own latch before fitting concealed rose door knobs?

Yes. Always measure the backset of your own latch before marking or drilling the door. Measure from the front face of the fitted latch faceplate to the centre of the square spindle opening.

Is 82.5 mm the correct backset for every concealed rose door knob?

No. The 82.5 mm measurement shown in our video applies only to the latch used in that demonstration. It should not be treated as a universal measurement for all latches or all 4-inch tubular latches.

Does this guide cover fitting the tubular latch?

No. This guide focuses on fitting the concealed rose door knobs after the latch position is understood. If you need to fit the latch first, read our separate guide to fitting a tubular latch.

Can I fit concealed rose door knobs over an existing spindle hole?

Sometimes, but you need to check the existing hole carefully. The concealed rose plate still needs to sit correctly around the spindle centre, and the fixing positions need to suit the latch and door construction.

Why might newly fitted door knobs bind?

Binding can be caused by poor alignment between the rose plates, spindle and latch. If the spindle runs at an angle, the knobs may grind or fail to return smoothly. Re-check alignment before forcing or tightening the parts further.

Do unsprung concealed rose knobs need a suitable latch?

Yes. With unsprung door knobs, the latch provides the return action. A suitable heavy-duty latch is recommended so the knobs return properly after use.