The picture shows the 4th floor of my house which has stairs coming up into the room. I have some issues with how to insulate different parts of the roof but in this post I am specifically asking about the highlighted area in the voids.
There is nothing between the roof and the ceiling on the floor below in the void space, which I'm guessing makes the rooms on the 3rd floor colder than it could/should be. Therefore, I was going to lay 170mm loft roll in between the struts in the voids and tuck it in as far under the floorboards as i can. And run 100mm accross this to create the 270mm thickness. Is this ok? Any issues?
Thank you in advance.