Hi
I have a reasonable size loft with 50mm of insulation in it and 100mm joists.
Having scoured the web for feedback I'm wondering how best to proceed to get closer to 270+mm.
Everything seems to focus on 100mm between the joists then 170mm run perpendicular to the joists over the top.
To do that, I'd have to lay another layer of 50mm across the loft before running the perpendicular rolls.
Is that my only option? Could I just run the perpendicular rolls or would the air gaps underneath defeat the point of extra insulation?
Would another option be to run 150mm over the existing 50mm between the joists (which would then be 100mm proud of the top of the joists) then run 100mm rolls over that at right angles? (i.e. 50mm+150mm between joists then 100mm rolls running perpendicular)?
Any feedback welcomed.
I have a reasonable size loft with 50mm of insulation in it and 100mm joists.
Having scoured the web for feedback I'm wondering how best to proceed to get closer to 270+mm.
Everything seems to focus on 100mm between the joists then 170mm run perpendicular to the joists over the top.
To do that, I'd have to lay another layer of 50mm across the loft before running the perpendicular rolls.
Is that my only option? Could I just run the perpendicular rolls or would the air gaps underneath defeat the point of extra insulation?
Would another option be to run 150mm over the existing 50mm between the joists (which would then be 100mm proud of the top of the joists) then run 100mm rolls over that at right angles? (i.e. 50mm+150mm between joists then 100mm rolls running perpendicular)?
Any feedback welcomed.