Installing pre-hung door with trim

[DaveC]

Bought pre-hung door with frame (obviously) and trim already installed.

The only way I can see to install this door is to remove the trim from both sides and, after installing the door and frame, reinstalling the trim.

Is this correct? If so, what reason is there for installing the trim onto the frame?

I need to install the shims on all sides of the frame, so I can't see how to install the shims with only one side of the trim removed...

Ideas?

Thanks,

[Timothy Lange]

Are you sure it is not a split jam that just pulls apart and you then install the side with the door first, shim it, nail it, and then install the other side and nail it? Mine are like that. Found a couple that were not nailed on the non-door side.

Tim.

DaveC wrote:

[DaveC]

Thus spake Timothy Lange:

-=-=-=-

Lo an' behold! It is a split-jamb.

But the question still rears its head: how do you install the shims to give you a plumb-and-square install, when the casing is already nailed to the (half) jamb? Access to the space between the rough opening studs and the door frame is accessible from only one side (the non-casing side).

Ideas?

Thanks,

[Joe]

You can keep the jamb assembly square by nailing a diagonal brace to the non casing side. Use the 3 4 5 rule to ensure square. Then install shims using a Jamber level set or at minimum a 2' and 4' level set. HTH

Joe

[david ashworth]