Lowering ceiling

[Danielscrable]

i plan on doing up a bedroom which has an old lath and plaster wonky artex ceiling. It's an old house so theres plenty of height in the room. I plan on building a timber frame just underneath the old ceiling to board and plaster,
should I use 2 x4 or 2 x 5 to stop sag?
Iv heard some put banding strap half way along to the original joist to stop sagging, but I was hoping to not touch the old ceiling as would be to messy.
The max span is only 2350
Thanks

 

[foxhole]

Should be no sag on short span, even 3x2 would do .Stick some insulation in there as well.

 

[Deleted member 292770]

89mm cls

 

[Danielscrable]

Thanks for the reply guys, I thought so but heard so many mixed reviews, very appreciated thanks