cavity wall insulation

[TheAngryDog]

A topic I am sure has been done to death.

The house we are buying has no cwi or roof insulation. I am aware of grants being available but I suspect that we do not qualify.

Is cwi and roof insulation worth doing in a 40 year old house? And with no grant being available, what does it tend to cost for the walls to be done? I know it's dependent on house size, but ball park?

Are there any issues to take into consideration? We are looking at having new vented fascias and soffits installed as well.

Thanks.

[TheAngryDog]

Thanks for your reply.

The house we are buying in a 4 bed semi, a decent sized one but not huge. 500 quid I would be happy with.

All of the Grant info I have seen seems to rule us out though?