How To Fit A Suffolk Latch

Suffolk Latch on ledge & brace door


What Is A Suffolk Latch?

The traditional Suffolk Latch is a simple drop bar latch, usually fitted to a ledge & brace door. Also known as a Thumb Latch, these door latches are the perfect choice for period properties. Most hand forged Suffolk Latches are only suitable  for internal doors, due to the risk of rusting, however there are latches with a UV and rust resistant coating that are suitable for external doors. Gate Latches are the ideal choice for sheds, gates and other external buildings. Before purchasing a Suffolk Latch or Gate Latch, make sure it is suitable for your doors.


How To Fit A Suffolk Latch

Follow our step-by-step guide for fitting a Suffolk latch to an internal ledge & brace door. This guide can also be used if you are fitting a Gate Latch to a shed or gate. 

1. Preparation

Before starting, you need to confirm which way your door opens. Does your door swing into the room when opened? The design of a Suffolk Latch enables the door to be opened from both sides, however the latch bar and the handle with thumb lever can only be fitted to certain sides of the door.

Important: The handle with thumb lever has to be fitted to the side of the door that opens away from you, and the latch bar is fitted to the side of the door that opens towards you.

If you have a cupboard door, where access is only possible from one side, it would be best to fit a Latch Set (this is essentially the back end of a Suffolk Latch).

2. Parts Checklist

Suffolk Latch Parts



    • Thumb Latch Handle with Bar
    • Latch Bar
    • Knock-in Staple/Screw-on Staple
    • Keeper

    Please note: You need to choose whether you are going to use the knock-in staple OR the screw-on staple. Do not use both. The knock-in staple is the most traditional part for keeping the latch bar in place, however, you will need absolute accuracy when fitting it. For this reason, most people prefer to use the screw-on staple.

    Now, let's fit this latch!

    3. Marking Out


    Marking out the door for fitting a suffolk latch

    Mark on the door, in pencil, the points you will need for creating the slot for the latch bar. You will first need to decide where your Suffolk Latch is going to Here are some helpful guidelines:
    • A Suffolk Latch usually sits approximately 130cm from the bottom of the door, but this is not a rule. Fit the latch at a height most suitable for your door and your personal preference.
    • Once you have decided upon the height for fixing the latch, draw a faint vertical line in pencil, 50mm in from the door edge (please note: 50mm is a standard guide and can be altered according to your specific door/door jam specifications)
    • Draw a horizontal line intersecting the vertical line at the point where you want the thumb part of the latch to sit.
    • Then draw a second horizontal line 30mm up from the first line - this will be the upper and lower limit of the slot you will need to create.

    Important Points:

    • The latch should be at a height that is comfortable - you don't want to be reaching up or bending down to open the door.
    • It is generally good practice to have all hinges and latches on the doors in your home at the same levels. If you have other latches, fit your new latch at the same height as the others.
    • The 50mm measurement from the door edge is an absolute minimum - please adjust according to your door/door jam specifications.

     4. Creating The Slot


    Creating the slot for fitting a Suffolk Latch


    Tip: A router is neat and fast. Cut the slot in three equal passes and remember to clamp a piece of wood on the other side of the slot to prevent any breakout.

    If you don't have a router you can use a 10mm drill. Create a a line of holes along the marked out area and drill the holes. Then use a round rasp and carefully join up the holes to create a slot.


     5. Fixing The Handle & Bar


    Fixing the handle and bar for fitting a suffolk latch


    Carefully pass the bar through the the slot that you have just created.

    Lower the handle so that the bar sits on the bottom of the slot and is at 90 degrees to the door front when looked at from the side

    When you are happy that the handle is in the correct position, mark the holes with a pencil then remove the handle

    Tip: Slotted dome head screws can be hard to fit, especially if you are screwing into an oak door. Use a conventional pozi drive screw to create pilot holes first. It is also important to use a screwdriver where the driver blade properly fits into the screw slot, otherwise it can leave a sharp burr.


    6. Fitting The Latch Bar


    Fitting the latch bar of a Suffolk Latch


    • Lay the latch bar over the lever on the reverse side of the latch, allowing for about a 10-20mm overhang from where the keeper will be finally fixed. You may need more than 20mm in some instances, depending upon your door configuration.
    • The latch bar should be horizontal to the the floor. 
    • When you are happy that it is in the correct position, mark out the hole.
    • Create a pilot hole with a pozi drive screw, then reposition the bar and fix in place with a slotted woodscrew.  Please note the screw should not be fully tightened - back the screw off, to allow free movement, but not too much as to create a sloppy fit.

    7. Fitting the Staple


    Fitting the staple to a suffolk latch


    With the lever and latch bar now firmly in place, it is now time to fit the staple. Traditionally, the staple would be hammered through and the spikes showing the other side would be bent over.  If you are going through a ledge or brace this will not be a problem because of the thickness of the combined material.  Some people, however, don’t like this option which is  why we offer an alternative with the screw on staple.

    Offer the staple up to the latch bar making sure it is upright then give it a firm tap with a hammer leaving two small indentations. 

    • Using a small drill 4-5mm in diameter drill two pilot holes - this will help with knocking the staple into hard material such as oak and also prevent the timber from splitting.  

      Tip: I cut the spikes so they don’t quite go all the way through the door. Then I drill two pilot holes that I fill with PVA glue before I hammer home.  This maintains the traditional look without the unsightly knocked over spikes showing on the reverse side of the door.

      8. And Finally: Fitting The Keeper


      Fitting the keeper of a suffolk latch
      Finally, you need to fit the keeper of the Suffolk Latch. Although it is an easy-to-fit part, you want to ensure you get that reassuring clunk when the latch is closed. Each of your doors will be slightly different and each Suffolk Latch is individually hand-made, therefore you will need to measure carefully to get the keeper in the right place.

      Close the door and make sure the latch bar is resting against the door surround.

      With a pencil, draw a faint line on the underside of the latch bar.  This line is the inside edge of where the latch bar will fall into the keeper.

      Drill a small pilot hole just under the line and the correct distance in from the edge. 

      Carefully knock the keeper into the frame and screw into place. It is important to note that there is a degree of license at this point,  you can tap the keeper up, down, left and right until you have got it in exactly the right position. 

      When you are happy, secure the keeper with one of the screws provided.

      And now you have a perfectly fitted Suffolk Latch!

      If you have any further questions or queries please drop us a line at: