Insulation between floors on a 1960s Chalet style house?

[wue57cysd]

I removed some of the tiles on the rear tiled section between the ground and first floor on my 1960s Chalet style home to remove an unused old extractor vent. A piece of sarking felt was missing (for the old vent tube), and I could see half way towards the front of the house until an internal brick wall. Essentially there is no insulation for the cavity created by the floor joists and the internal brick wall, all that is insulating this space from the outside world is some tiles. The upstairs bathroom has been cold in the winter due to some draughts, and the kitchen downstairs has also been cold, they both share an inernal boxed in waste stack that rises close to this area.

Should the void between the ground floor brick wall and the first floor wood construction wall be insulated? I have heard that some of these older houses were built with these sorts of gaps to avoid problems with damp. But it does seem like Im probably losing a lot of heat to the outside world.

Thanks

 

[^woody^]

 

[Koolpc]

Amazing art work! Are you related to Banksy?

 

[wue57cysd]

Thanks Woody, but this is not loft insulation, but insulation of the eaves between the ground and first floors.