Painted internal brickwork wall - cons?

[Rubyblueshoes]

I've posted a similar thread with regards to building regs but what I'd really like to know now is if a painted internal brick wall (so not insulated) makes a room REALLY cold in the winter?
I'm hoping to do a dormer loft conversion with a bedroom in it and wanted to leave the wall on the right uninsulated and painting the bricks instead.
I could put up with having to have the heating on a bit higher but if it's very obviously different I probably wouldn't do it.

Anyone know or have any experience in this?

 

[freddiemercurystwin]

Honestly, its a mystery why people bother with insulation at all!

 

[Rubyblueshoes]

Helpful answers only please

 

[freddiemercurystwin]

To bother insulating or not?