How to use a mitre box to cut skirting

 
     
     
 Shop for Mitre Boxes 
     
     
   

Preparing to use your mitre box

 
 Wonkee Donkee Plastic and wooden version of the mitre box 

Step 1 - Choose your mitre box

There are mitre boxes specifically designed for cutting skirting boards but a multipurpose mitre box is the most commonly used by the average DIYer. For more information, see  What are the different types of mitre box?

 
     
 Wonkee Donkee A Tenon Saw is the ideal saw for use with a mitre block or box 

Step 2 - Choose a saw

A tenon saw with its fine teeth is ideal for woodworking and is best suited for cutting skirting board.

 
     
 Wonkee Donkee secure mitre box to vice or workbench  

Step 3 - Secure the mitre box

Securing the mitre box in your vice or attaching it to your workbench will give you added stability when you are sawing.

 
     
 Wonkee Donkee Mitre box with various slots for different angles 

Step 4 - Decide what angle you require

There are slots on the mitre box which allow you to cut at 45 degrees or 90 degrees. Some also have slots for cutting 22.5-degree angles.

 
     
   

How to cut a 90 degree internal corner

 
 Wonkee Donkee Cutting the internal corner of a skirting board 

Step 1 - Place first piece of skirting in mitre box 

For the left hand piece of an internal corner, place the skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you.
 
     
 Wonkee Donkee Cutting the internal corner of a skirting board 

Step 2 - Cut at 45 degrees

Take your saw and simply cut a 45 degree angle from the bottom left to top right of the mitre box. The piece of skirting to the right of the saw can be discarded (Waste Side) 

 

 
     
 Wonkee Donkee Cutting the right side of skirting to 90° 

Step 3 - Place second piece of skirting in mitre box 

For the right hand section of an internal corner, place the skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you. 

 
     
 Wonkee Donkee Cutting the right side of skirting to 90° 

Step 4 - Cut at 45 degrees

Simply cut a 45 degree angle from the bottom right to top left of the mitre box with your saw. The piece of skirting to the left of the saw can be discarded (Waste Side).

 
     
 Wonkee Donkee Finished 90° joint made using a mitre box 

Step 5 - Finished corner 

When both sections have been cut at 45 degrees in the manner above, you will achieve a neat and precise 90 degree joint.

 
     
   

How to cut a 90 degree external corner 

 
 Wonkee Donkee How to cut a 90° external corner using a mitre box 

Step 1 - Place first piece of skirting in mitre box

For the left hand piece of the external corner, you place the skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you. 

 
     
 Wonkee Donkee Cutting the right side of skirting to 90° 

Step 2 - Cut at 45 degrees

Then take your saw and simply cut a 45 degree angle from bottom right to top left of the mitre box. The piece of skirting to the right of the saw can be discarded (Waste Side).

 
     
 Wonkee Donkee Right hand side of external corner cut using a mitre box 

Step 3 - Place second piece of skirting in mitre box

For the right hand piece of the external corner, you place the skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you. 

 
     
 Wonkee Donkee Right hand side of external corner cut using a mitre box 

Step 4 - cut at 45 degrees

Take your saw and simply cut a 45 degree angle from bottom left to the top right of the mitre box. The piece of skirting to the left of the saw can be discarded (Waste Side).

 
     
 Wonkee Donkee Finished external corner cut using a mitre box 

Step 5 - Completed external joint 

When both sections of skirting have been cut as described, a neat 90 degree external joint will be produced.

 
     
   

Joining two pieces of skirting

 
 Wonkee Donkee Joining skirting using a mitre box 

Step 1 - Place first piece of skirting in mitre box

Place the first piece of skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you. 

 
     
 Wonkee Donkee Joining skirting using a mitre box 

Step 2 - Cut at 45 degrees

Take your saw and cut from the bottom right to top left of the mitre box to produce a 45 degree cut.

 

The piece of wood to the left of the saw can be discarded.  

 
     
 Wonkee Donkee Completing the joint using a mitre box 

Step 3 - Place second piece of skirting in mitre box

Place the second piece of skirting in the mitre box with the wall side of the skirting against the side of the box furthest away from you.

 
     
 Wonkee Donkee Completing the joint using a mitre box 

Step 4 - Cut at 45 degrees

Take your saw and cut from the bottom right to top left of the mitre box to produce a 45 degree cut. This time the wood to the right of the saw is to be discarded.  

 
     
 Wonkee Donkee Perfect skirting joint by using a mitre box 

Step 5 - Completed joint

When both lengths of skirting have been cut as described at 45 degrees and butted together you should end up with a neat and precise joint. 

 
     
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