I have a Victorian mid-terrace house with a large loft. So I could use it for storage, I had a loft conversion company install two steel beams between the party walls and then strap up a floor between them. This is great but the temperature fluctuates massively at different times of the year and even in the day/night. I would like to insulate the rafters to try and stabilise the temperature a bit so the stuff I'm storing doesn't deteriorate over time.
I have read that for a full blown loft conversion, the regs require 200mm of insulation slab with a 50mm gap between the insulation and the roof felt for ventilation. This seems excessive for my needs but what thickness should I go to?
I can see that insulation slab is available in 50mm and 100mm thickness. My rafters are approximately 70mm deep so if I do 100mm and leave the 50mm for ventilation then I will need to add 80mm battons all the way around.
I have read that for a full blown loft conversion, the regs require 200mm of insulation slab with a 50mm gap between the insulation and the roof felt for ventilation. This seems excessive for my needs but what thickness should I go to?
I can see that insulation slab is available in 50mm and 100mm thickness. My rafters are approximately 70mm deep so if I do 100mm and leave the 50mm for ventilation then I will need to add 80mm battons all the way around.