Hi all, trying to get rid of glass fibre in roof as going to be spending a lot of time re wiring, comms centre, alarm installing as well as future diy projects and storage etc etc.
having previously considered putting celotex at ceiling level (over joists leaving existing fibreglass between), considering further I have quite a few downlighters cutting holes through the insulation, actually perhaps it would make more sense to insulate the roof level instead and just put some simple boarding over the ceiling level josts for storage.
I can see the advice on celotex.co.uk and understand I can use 50mm under sarking (leaving 50mm air gap) between + 55mm (+) underneath for regulation insulation. Then I can get rid of all the glass fibre in the roof.
What I am unsure about is what I then do about the existing eaves ventilation, do I simply block it up? If so do I need to do anything to provide ventilation elsewhere or is it assumed that the gaps between tiles and sarking is enough?
Thanks for any advice!
having previously considered putting celotex at ceiling level (over joists leaving existing fibreglass between), considering further I have quite a few downlighters cutting holes through the insulation, actually perhaps it would make more sense to insulate the roof level instead and just put some simple boarding over the ceiling level josts for storage.
I can see the advice on celotex.co.uk and understand I can use 50mm under sarking (leaving 50mm air gap) between + 55mm (+) underneath for regulation insulation. Then I can get rid of all the glass fibre in the roof.
What I am unsure about is what I then do about the existing eaves ventilation, do I simply block it up? If so do I need to do anything to provide ventilation elsewhere or is it assumed that the gaps between tiles and sarking is enough?
Thanks for any advice!