Correctly insulating a single skin wall

[ILoveMondeo]

Morning all,

Short Version
Can a PH guru point me in the direction of the correct insulation and boarding/studwork I need to correctly insulate a single skin wall so the room can be classed as "inside".

Long Version
Have a half brick conervatory / lean-to at the back of the kitchen. Just a single glazed window, door and wood panel makes the separation between inside and outside. No insulation to speak of, but likely built well before modern building regs (70's or 80's), It's rotten as hell and is getting replaced with UPVC for the lean-to and I'm removing the adjoining window/door/panel at the same time.

Strictly speaking this means I'm in breach of all find of regs with regard to insulation, so need to insulate and damp proof the single skin brick bit properly.

So What to do?
I know it can be done with the right stuff, there's a variety of kingspan products available, but that's where I get lost. A bit of stud work and plasterboard is easy stuff, I can handle that, but I'm unsure of what products to use, if I need a damp membrane, there seems to be a variety of ways of doing it and the more I search online the more confused I get!

Thanks!

[B17NNS]

Even if you insulate the single brick walls the room will not be classed as a habitable space due to the new conservatory. There needs to be an exterior door between house and conservatory.

If however you just want to make an improvement in terms of damp and insulation I'd go with an air gap membrane on the walls. Batten and then clad in insulated plasterboard.

[ILoveMondeo]

B17NNS said:

Even if you insulate the single brick walls the room will not be classed as a habitable space due to the new conservatory. There needs to be an exterior door between house and conservatory.

If however you just want to make an improvement in terms of damp and insulation I'd go with an air gap membrane on the walls. Batten and then clad in insulated plasterboard.

Oh dear, this might be another thread... what am I missing? to be clear, it's a small lean-to, not a massive conservatory, 5m x 1m at a guess. Less than 1/3 the size of the kitchen floor space, but opens the rooms up massively. Total glazed area of the room will be way under 50% (which I thought was the tipping point).

Is it the glass roof that'll be the problem?

How does it work with those mega open-plan conservatory/kitchen/living space things I see? A lot on modern builds/re-furbs?

[ILoveMondeo]

I should add, building regs is the target here, I personally couldn't give a toss about the thermal insulation properties, it's a 200 year old solid brick wall cottage. Insulation is pretty crap throughout the house and isn't going to change.

[V8RX7]

ILoveMondeo said:

I should add, building regs is the target here

Then you want to get a private co. and ask the Inspector what he will be happy to sign off.

IME they don't care - I've got a load of glass in my extension that in no way passes Regs and it's signed off.