Thick carpet underlay as temp "box room" insulatio

[bobalong]

gooday DIYnot readers,

I have a loft space, think box room, with sod all insulation in rafters or underneath floorboards. This is above kitchen and is losing a lot of heat. The megaflow is in this space and varous pipes, and electrics for the inset kitchen lights are between joists of kitchen and cieling of kitchen.

My question: should I lift the floorboards as best I can and fill joists up and encase electics in plastic tube, put card caps over lights...etc.

...Or could I put 2 layers of heavy felt carper underlay over the whole floor as a temp solution - i.e. would this work insulate kitchen

NOTE: temporary as this would be for one winter only as upstairs will be reconfigured there and we would insulate properly at that time.

thank you.

 

[AronSearle]

It will feel warm to walk on, compared to bare timber, and it might stop droughts through the floorboards, but its actual insulation factor will be next to nothing.

 

[bobalong]

even with tog rating of 3.5?
had a sneeking feeling someone might say that.
Suppose you don't get by without some graft.

 

[AronSearle]

Off the top of my head, 3.5 Tog, is about the same as 20mm of mineral wool (yes, 20mm not 200mm).

 

[bobalong]

I had tried to work that out, so thank you - very useful info.
I will spend and lift board and insulate properly.