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spray foam in the loft
My mother (bless her boomer cotton socks), had the loft in her Georgian house sprayed.
When she came to sell, only cash buyers would be entertained, as nobody would sell a mortgage on a property that age with that insulation.
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Happy to be corrected as that makes me feel a bit better!
Practically though with a solid wall you do still need to come up with a system to fix it to the external wall, provide weatherproofing etc. It's more work and more expensive than putting insulation in a cavity, which is mainly what I meant by harder, even if you're less likely to encounter problems when it's done.
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Although it's also cowboy retrofit territory
Hah, yeah. In that dangerous nexus of naive customers, cheap shit products, little up-front investment required, no specialist skills required, mechanical delivery, mostly invisible, all future problems can be waved away or blamed elsewhere.
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NotThamesWater
Fox
Howard
@hoefla
Disagree. Least likely to be problems doing EWI on a solid wall. With cavity there's a lot that can go wrong in terms of moisture and I think much of what has already been done has caused a lot of damage to the existing buildings. Although it's also cowboy retrofit territory (see also spray foam in the loft, snake oil rising damp solutions).