This is what I have been doing for nearly 20 years :- end of August ish, after taking all my supers off I add a brood box with with foundation above the brood area no Q/ex, I then feed heavily with syrup, this achieves several things that work for me, firstly they have no need to collect Ivy that crystallizes, for me more importantly the brood will be in the middle of the lower brood box, over the winter they will move one way or the other to a side wall , ( starvation time for a lot of colony) having run out of stores they move up to the box above, warmer and with stores. early spring I take away the bottom box for cleaning etc leaving the brood in a relatively clean new area.