Guess as its for the kids a wood buring fire is a no.
Get your kids good jumpers.
It's cold mate but you could throw loads of money on kingspan and other insulating things but you need a heat source like my plasma tv.
The war is keeping the heat in.
The problem is ebay and sites like this.
You get it posted in a brown envelope or box that you have to pay import duty on it then you find out its junk.
The strange thing that happened is that you don't understand 2 way switching.
Look it up on here it might help you but you are messing with lots of live switch wires and loop wires so you may need a tester yo help you out.
You need to find the loop wire and the other loop wire that feeds...
Not your thread.
I think its the people that ask about wiring a garage from the house C/U and a garage C/U and the people that ask about light switches and fittings.
Your thread was more about where to put conduit which is a fair question tbh.
Its the roof that needs to breath not the foil so it only needs a gap at the top.
If you ram it full of the other stuff the roof will not be able to breath.
I think the drawings for the loft told us to use 150mm celotex between the rafters leaving a gap between the roof and board letting it breath and I think the other board is acting as a vapor barrier.
Seems to be working ok.