We are going to run through some background on what joints are used when fitting architraves and skirting boards.

When installing skirting boards and architraves there are lots of situations where joints need to be used. In this article, we will focus on the main six uses


The Butt Joint:- Used to join 2 pieces of skirting board along its length

Although this method is the easiest and quickest way to join 2 lengths;of skirting board together it will probably remain highly visible after decorating and will also be prone to cracking

The Butt Joint


The Headed Mitre Joint:- Used to join 2 pieces of skirting board along its length

When you need to join lengths of skirting board together to make it longer the best and neatest way is to use the Headed Mitre Joint. This method has several advantages over the easier Butt joint method. This joint will be easier to sand down and blend in, than a Butt Joint and the joint line will be far less visible after decorating, if the joint is cut correctly.

Headed Mitre Joint


The Internal Mitre Joint:- Used to join 2 pieces of skirting baord at an internal corner.

This method of joining internal corners is probably much quicker and easier than the correct scribe joint. It is not normally recommended because there will be gaps in the joint if the walls are not square to each other and the joint will crack and open up when the boards shrink or expand with changes in room temperature and humidity.

Internal Mitre Joint


Internal Scribed Joint:- Used to join skirting boards together at an internal corner.

Although this joint is trickier to cut than the internal mitre, this is the correct and best way to join skirting boards at an internal corner. Only the one board needs to be scribed and it will be okay to use on corners under 90° and if it is undercut it can be used in corners above 90°.

The Scribed Joint


The External Mitre Joint:- Used to join 2 pieces of skirting baord at an external corner.

Probably the only way to join 2 skirting boards together at an external angle. Normally this joint is cut at 45° each side to create a 90° corner but with care can be adjusted to suit joints above or below 90°.

External Mitre Joint


The Architrave Mitre:- Used to join together the legs and head of architrave door sets.

Unless you plan to fit Rosette Blocks this is the only way to join basic architrave legs and heads together.

Architrave Mitre Joint