architraves fixed to door frame or wall?

[johnhenstock83]

evening,

 

I started working on two doors downstairs, utility and wc. architraves go in first, so I got myself some 40mm nails (no nail gun) and no non-sense grab adhesive.

 

the adhesive is pants, doesn't do much, just makes a lot of mess, has the consistency of wall filler. the nails don't hold much either, MDF architraves.

 

my builder said they get fixed to the door frame, I disagree with my non-professional thinking. what's the consensus here?

 

thanks

[Dave Jones]

 liner of course. unlikely the wall will be dead flat to the liner which should have been fitted plumb and level so no gaps in the archi after its fixed.

[johnhenstock83]

I fixed it to both. Fixing it to the door frame only is an eztremely flimsy connection. Door frame and “wall” (stud) is proper sturdy.

[joe90]

I glue and nail architrave to the door frame and use “no nails” on the outside edge of the architrave to the wall which also acts as a filler.