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How to fit a letter box - DIY Tip 14


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  • First decide where you want to put your letterbox on the door. Use the letterbox as a template and draw around it, you can position it correctly by measuring from the top of the rail (it is being fitted in) to the top of the letterbox.
  • If you are a perfectionist you can make sure that the letterbox is positioned both vertically and horizontally by using a spirit level. Make sure you also take note of the spring mechanism (if there is one) and mark this opening on the door.
  • Cut out the wasted wood by using a jigsaw or padsaw.
  • To help start this off, drill small holes at opposite corners of the template drawing. Remember to use a timber block on the opposite side of the door and at the position where the drill will appear to prevent the door splintering.
  • Mark where the fixing bolts will be positioned. Some letter plates such as the Flapmaster type we sell are screw fixed rather than bolt fixed.
  • Drill the holes for the fixing bolts.
  • Hold a small block of wood on the other side of the door in the same space you are drilling, this will prevent the wood from splintering when the bit passes through.
  • Sand any rough edges of the newly cut apertures.
  • Fix the bolts in position with the fixing nuts - you may need to cut the bolts down at the back if they protrude past the nut. This can be done with a hacksaw.

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