Best way to joint a window mullion to the surrounding frame

[markturner]

Hi, as title, making a couple of windows by hand rather than the usual buy them in option and while I have the cross joint worked out for the mullions, I scratching my head a little for the best way to locate / attach the mullions to the horizontal and vertical frame members around them. They looked too small and fiddly for dominoes, so some kind of joint is required.......Suggestions welcome. Thanks!

 

[RobinBHM]

Mullions are normally mortice and tenoned, scribed as required.

In a window frame the mullions run through and any transoms go in between - with small stub tenons for location.

Generally they are screwed the same as the outer jambs


Note: Mullions are vertical components, transoms are horizontal)

I should add you need to think about water shedding if the sashes are flush fitting - sometimes the transom has a small drip added, and the transom and head of sash have a drip groove to carry the water to the side.

 

[markturner]

Thanks, I think I have it figured out now, a mortice and tenon should do the trick

 

[Agent_zed]

Thanks, maybe I used the incorrect terminolgy....The mullion I refer to is the profiled section in the picture these need to be jointed into the frame of the window. I was going to use dominoes for assembling the frame sections and planned to drop in the assembled glazing mullions after......

If the frame is complete the only way I can see you can do this is to have an open mortice/tenon, so you slide your mullions in from the rear and it is then all locked into place when you glaze it.