"Onetap" wrote in message
...
On 7 Apr, 21:05, "ARWadworth" wrote:
From the post with the title "Between-floor insulation" there is a link
to

http://www.screwfix.com/search.do;jsessionid=1TKB24B535ZJYCSTHZPCFFA?...

It says in the review that it encourages heat to rise. Can someone tell
me
what I am missing out on here as I thought heat did rise.

Adam

Heat does not rise.

Warm air rises (natural convection) because it is less dense than cold
air.

Heat is transferred by conduction, convection & radiation. This
reflects radiated heat back into the occupied space, reducing the
radiant heat loss.

That is what I do not understand. The foil is supposed to be under the
floorboards and if the house has normal radiators then I thought there would
be no radiant heat under the floorboards.

Adam