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khobombed

06:53PM | 10/18/04
Member Since: 10/17/04
4 lifetime posts
Bvhvac
Within the walls of my 1950s era home is a strange type of insulation. At first it looks like blocks of foam rubber but when handled it crumbles into fine dust. I've been wearing a standard mask but don't know what this stuff is. It could be something from the 1970s as well because it appears in parts of the house were apparently renovated then. Thanks in advance

bravey

10:47AM | 10/20/04
Member Since: 06/23/04
162 lifetime posts
What you have is probably foam insulation that was installed with a hose through a hole in the wall. The foam expands and fills the voids in the wall cavity. Early installations (70's-80's) used a foam that, over time, shrank away from the studs and created loose fitting "blocks". The foam also tended to be easily crumbled when touched.

khobombed

06:14PM | 10/20/04
Member Since: 10/17/04
4 lifetime posts
Cool, Thanks.

I'll continue using the gloves/mask cause who knows what's in that stuff. If it's the old foam insulation like you said then it could possibly have urea and ammonia, not good once it's in the dust stage I imagine.
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