I've just completed installing 200mm off glass mineral wool under floor insulation. I've got a fair amount of headroom in the crawlspace....so installed from beneath.
I would recommend using the follow netting from Tenax:
http://www.tenax.co.uk/showcategory.asp?category=166&menu=3
It...
I have a Volkera compact SE boiler and use a Drayton Digistat +3 programmable thermostat.
Can anyone advise if it's possible to retro-fit a weather compensator; if so, do you think it's worth it in terms of savings.
Cheers from a newby.