Timber door joint shrinkage.

[Restoration man]

Hi
My front door is made of larch and is original so is about 90 years old. There are quite large gaps at the timber joints abut 2mm. I am planning to restore the door and paint it.

I presume normal wood filler is cosmetic?Is there anything I can put into the joints that will actually provide strength aswell as acting as a filler?

Thanks

 

[crank39]

Doesn't help that most of the mortice and tenon joint has been chopped out to fit the lock

 

[Hot&Cold]

2 part wood filler can be used in the well raked out joints,similar to car body filler (some say its the same).
https://www.ironmongerydirect.co.uk...riteo&utm_medium=cpc&utm_campaign=lowerfunnel