Loft Insulation - Best Type and Tips for Installation

[IMM]

The eves

Good idea.

If they have hollow walls then yes.

Then your walls were too thick. Don't use cavities.

[N. Thornton]

Unlined slate roofs let in quite a bit of water, as you say. To dry out they must also let in the wind. You therefore should not be using any type of insulation that doesnt let the wind go through it, such as vapour lined boards. Trap water like that and you've got real problems.

Of course this limits how much insulation value you can get in there, but thats secondary to the roof staying up.

I could take a guess at loose fibreglass being suitable, but being unclear about the construction details it would only be a guess. Anything more substantial would need to be applied to the interior. But, even 4" or 6" of fibreglass makes a big difference.

Regards, NT

[IMM]

If the roof is coming off it is best to fit a warm roof and be done with it.