Insulation

Loft with no height. How to insulate without raising joist height

Anonymous user 09/03/2024 - 3.04 PM

We have an old cold cottage. There’s minimal room in the attic and you will hit your head by just crawling through. I want to board and insulate the attic to try and keep the house warm. However, the joists are 170mm. I have battened the joints with one inch wood in order to run the electric cables through (as notching and drilling joists I presumed was a no no) I could lay 170mm of earth wool and board it easy etc but this isn’t enough. How do I get 270mm? I can’t raise the floor any more or else I won’t get my stuff in etc. Any ideas? Someone said use celotex boards but what size etc? Is this the correct way to do it for my problem Many thanks