Insulation advice

[StephenStephen]

My amateur response would be - why not just fix insulation underneath the passageway boards? (as aveatry is suggesting), maybe insulated plasterboard?
I'd also insulate under the floor from above

 

[aveatry]

My amateur response would be - why not just fix insulation underneath the passageway boards? (as aveatry is suggesting), maybe insulated plasterboard?
I'd also insulate under the floor from above

Not sure if plasterboard will be happy outside. If access is easy from above then you could do both I suppose

 

[Seanchadwick2k3]

I'm just unsure of the best option and dont want to do anything which could make things worse.

The passage way is split 50/50, next doors front bedroom overhangs the entire front half and our rear bedroom overhangs the entire back half.

I do have access from above if I pull up the boards and was planning on ripping up the carpets anyway.

I guess if I can avoid disturbing those potentially harmful boards then that would be the preferred option although a bit more fiddly.

Obviously I want to try and get rid of the cold/damp without going nuts too and going over the top.

 

[Harry Bloomfield]

I do have access from above if I pull up the boards and was planning on ripping up the carpets anyway.

I guess if I can avoid disturbing those potentially harmful boards then that would be the preferred option although a bit more fiddly.

Obviously I want to try and get rid of the cold/damp without going nuts too and going over the top.

I would discuss it with your neighbour, and maybe make it a combined job for the outside part at least. You will both benefit.

 

[hllns]

I would discuss it with your neighbour, and maybe make it a combined job for the outside part at least. You will both benefit.

Probably not as It looks identical to the passageway alongside my 50s newtown place, the party wall is normally one side of the passage rather than on the centre, my neighbour has all of the space above the passage and a flying freehold over half of it for a bit of their house.

Edit: Apologies, just read the newer bit above about it being a front/back split

 

[freddiemercurystwin]

Not sure if plasterboard will be happy outside.

Correct, there are suitable insulated boards that can be used for external soffits or insulation + the board mentioned earlier in the thread. Or just do everything form above and ignore the soffit, also mentioned earlier.