SEO not working properly - wall & roof

[atelier b]

I have a wall that should go until the insulation/wood beam of the roof but the insulation is still above the wall...

I already changed the priority of the wall materials to the max (999) and the priority of the insulation and finishing to the min (0).

Can anyone help me with this?

I've done it before and it has worked...I don't know why I can't seem to be able to do it now...

[Barry Kelly]

If you have done an actual Solid Element Operation with upwards subtraction, then it will always cut the wall at the underside of the roof.

If you want to trim individual skins, you must use the right mouse click 'trim to roof' command.

Then Building Material strengths will come into play - strongest will cut weakest.

Barry.