Mould under 1930 bay window

[chrisjjr1980]

Do you think I will need the insulation in your picture or would the insulated plasterboard suffice?

 

[JohnD]

The more insulation, the better.

 

[noseall]

Do you think I will need the insulation in your picture or would the insulated plasterboard suffice?

You need to fit as much as you dare between the uprights, whilst leaving a wee air gap on the cold side and then as thick as you dare (without compromising the window board) ACROSS the studs - prior to fixing the plasterboard.

 

[Diver Fred]

Have a look at

Should give you ideas and thoughts on how much you can do.

 

[Jonesy85]

Hi all, decided to tackle this myself. Wasn't expecting straight to brick wall. No going back now, but thinking I'll need to build inwards now with small gap from brick > insulation board > plasterboard?