My question is about insulating the ground floor. I have a crawlspace under the floor which is vented and therefore quite cold (average temp in the winter is 4 °C and in the summer 13 °C plus there are loads of cold winds).
I think I would like to do it without stripping all the flooring - I would like to use the crawlspace to insulate it from below.
I have spoken to some 'well versed colleagues' and there is no consensus - options that have been suggested so far are
- Squeeze blocks of styrofoam between the joists from below
- 'Hug' entire floor with insulation foil from below
- Take glass wool and 'hang it' between the joists with some foil or panels
Now I am not sure which method is best (or none of the above?).
Can you please suggest best course of action?