Leon wrote:

Robert, do you see particle or plywood joor jams these days?

I really on see wood. Mostly some kind of Chilean cousin of pine that
is hard as a rock. I am doing a lot of installs and finishing of
interior and exterior doors of a local lumberyard and I have steered
them away from particle board and anything else.

By the time they figured out the price between the mystery South
American hardwood and the particle board it wasn't that great, and if
the mystery wood is to painted (like you would MDF) they use the cheap
finger jointed stuff anyway.

The custom doors they make or sell have hardwood jambs to match the
doors, but that has gotten so expensive due to the cost of solid jamb
material that most people opt out and just get paint grade frames.

I hate the MDF frames as it almost double the amount of shims I have to
put in. That stuff is so limber and moves so much (even with one coat
of primer and two coats finish) that you really have to secure it. It
is hard to get and keep the margins really straight.

So I charge enough extra on the installation of MDF frames to make it
worthwhile for their customers to pick the wood frames. Kinda helps
things go in the right direction.

Robert