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ThrowawayPermanente ,

You’ll have to buy a machine to heat and mix the chemicals, but two-part urethane foam insulates like crazy and only requires small holes in the wall.

Hazzia OP ,

Isn’t urethane foam really flammable though? That’s why I’ve been avoiding it, fiberglass, and organic types of blown insulation.

legopika ,

Fiberglass isn’t flammable? Or were you avoiding it for some other reason?

Hazzia OP ,

Okay, my mistake I did forget it was inflammable, but yeah, there are other issues with using it for my house, like rodents using it as a nest, and it disintegrating after a few years, which would require me to open the walls to extract it later. Longevity was another reason I was leaning towards mineral wool and perlite.

weariedfae ,

Fiberglass insulation is not inflammable (which means the same thing as flammable), it is fire-resistant. But yeah if you’ve got the money mineral wool is really good.

Hazzia OP ,

But my problem is that the only mineral wool manufacturers I know of have discontinued their loose fill products, hence the post

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