Your Views.

[TWR]

Im sure I have it right but I'll ask your views, I have had the Cavity wall insulation, the Loft Joists insulated and Boarded, One area left & that's the inner roof, would you have this done? It's only for storage it's a 1930 semi.

[SlackAlice]

Provided your loft insulation meets the 270mm mineral wool thickness, that should be adequate.

You need to allow for ventilation in your loft to keep the timbers dry so if you are considering infilling the roof timbers make sure you leave a gap at the bottom to allow air in and out.

[The Builder]

Agree with Slackers, but I don't quite understand what you mean by the "inner roof"

[Gizmonster]

I'm also not exactly sure what you mean by the inner roof.
The way I read this, is that you're on about the actual roof itself in the loft space.
My question is, have you had it converted, i.e. stairs going up to the loft, etc, or is it still sealed with a proper loft hatch and only used for storage?
I'm guessing that when you say inner roof, you're referring to the actual roof itself, in which case the only insulation you'll have is the slates, battons, etc.
If the loft hasn't been converted and doesn't have stairs going up, etc, I wouldn't bother insulating the roof.
If, on the other hand, it's been fully converted, I'd suggest you board out the roof with the appropiate boarding, insulation, etc.
I could have completely misunderstood this, in which case .... ignore all of the waffle above :P

[TWR]

I should have said the atic roof, there is access via a ladder I put up, the floor is boarded with 270mm of correct insulation, I did not know if I would be wasting money by doing the roof space and fully insulate the house, there will be vent space within the atic.

[Gizmonster]

.... in that case, I personally, wouldn't waste money insualting it any more. Like I said in my last post, if it was accessible with stairs, then I'd prob insulate the roof, as it would prob get quite cold up there and the cold would prob work its way into the main part of the house via the stairs.

[The Builder]

I agree with Giz, TWR. I guess it's just for occasional use or storage, and unheated.

All insulation has some benefit, but in this case, probably quite minimal.

[TWR]

Thanks for the replies, It has put my mind at rest & has stopped my wallet from trembling. best wishes to you all TWR