Insulation under floor, gap in edge or fill?

[JP_]

Should I ensure nothing touches the external wall to avoid bridging dpc, or shove some insulation along the edge?

 

[John D v2.0]

We just sprayed expanding foam along the edges. If you don't insulate it's important to make sure no air can blow through the gaps.

 

[JohnD]

as you have good access, you can stuff mineral wool down those gaps. Pack it tightly. If there is a risk of damp, I think it is preferable to expanding foam, which I have seen sodden when removing roofs.

Incidentally, I've recently turned to using the pink fire expanding foam (intumescent). I happened to get some for round the linings of fire doors, and on consideration it seems worthwhile on gaps round ducts, ceilings, floors etc.

 

[JP_]

Just left it.

 

[Ady J]

pull it out, that stuff could get damp/wet

use the waterproof lined stuff + leave small air gap

edit -unless its upstairs or there's already a cavity/space underneath & its a bone dry area

 

[JP_]

pull it out,

Pull what out?