On Tue, 18 Aug 2009 08:30:59 +0100, Tim Lamb wrote:

Softwood door frames supplied by builder are finger jointed. I suppose
it might reduce warping?

No, it's just cheap. Probably a continious process from logs at one
end to made up frames/frame kits at the other. Logs are cut down,
jointed into a continuios length of timber and cut into the bits for
the frames. Instantly no waste due to log being 6" too short to cut
the required bits from.

--
Cheers
Dave.