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I think it was as much for sound insulation as much as heat. Lot of ash underneath tenement floorboard here in Glasgow
Keep it if you're going to be walking around I guess?
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Removing the old stuff should let you get a neater install of better performing insulation, so maybe worthwhile.
If its lath and plaster, removing all the old stuff may damage the integrity of the ceiling by breaking off the mushrooms.
Id carefully remove obvious loose rubbish and manky insulation. -
Found similar in mine the other day leaving it there as most of it is boarded out now and fuck moving insulation around, horrible job.
Small win, finally got around to foaming the big gap around our door as it became very obvious that cold air was pouring in. Just have to sort out the utility meter cavity now which appears to have a whole brick missing where it joins the door and replace the door seal which seems to have been crushed by the latch, though not sure that won't just happen again.
Getting a bloke in to fit vented caps to the disused chimneys too, mostly to prevent water ingress though I'm hoping it's going to reduce draughtyness further.
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Ours was similar, seemed a bit of a fire risk too but in the end it was so filtthy and gross i pretended like 'extra' insulation is better so left it under the new loft insulation.
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Attic has layer of rockwool, then what appears to be straw, string, soil etc. Is this the remains of original victorian insulation? Should I remove before adding another layer of insulation or just leave? would be a massive job but have the opportunity I suppose.
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