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Subject Author Date
Help me identify this type of insulation lawrenceww 08-13-2005
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Posted by on August 13, 2005, 1:30 pm


I have a house that has all exterior walls made from poured concrete,
no wood framing at all. The insulation on the interior is something
I've never seen before and looks to be actually part of the form to
pour the concrete into. It is black in color, very porous yet solid,
lightweight, about 2" thick, and crushes very easily - even between two
fingers. When it is crushed it turns to a sandy texture and emits a
foul odor, kind of like rotten eggs. My first thought was pumice, but
this comes in one foot wide by four foot long sheets. The house was
built in 1953 so if anyone knows what construction methods were used
back then and has any info please let me know. I'm just hoping its not
some type of asbestos, or something else that is hazardous.

Thanks,
LW



Posted by SQLit on August 13, 2005, 2:06 pm



> I have a house that has all exterior walls made from poured concrete,
> no wood framing at all. The insulation on the interior is something
> I've never seen before and looks to be actually part of the form to
> pour the concrete into. It is black in color, very porous yet solid,
> lightweight, about 2" thick, and crushes very easily - even between two
> fingers. When it is crushed it turns to a sandy texture and emits a
> foul odor, kind of like rotten eggs. My first thought was pumice, but
> this comes in one foot wide by four foot long sheets. The house was
> built in 1953 so if anyone knows what construction methods were used
> back then and has any info please let me know. I'm just hoping its not
> some type of asbestos, or something else that is hazardous.
>
> Thanks,
> LW

sounds like asphalt board to me. It is available at the box stores in 4x8
sheets. Where I live they use it sometimes between the concrete and the
earth back fill.

Concrete wall above grade?

Do you live in a Edison house? Pictures please.




Posted by on August 13, 2005, 9:18 pm


On 13 Aug 2005 13:30:43 -0700, lawrenceww@earthlink.net wrote:

>I have a house that has all exterior walls made from poured concrete,
>no wood framing at all. The insulation on the interior is something
>I've never seen before and looks to be actually part of the form to
>pour the concrete into. It is black in color, very porous yet solid,
>lightweight, about 2" thick, and crushes very easily - even between two
>fingers. When it is crushed it turns to a sandy texture and emits a
>foul odor, kind of like rotten eggs. My first thought was pumice, but
>this comes in one foot wide by four foot long sheets. The house was
>built in 1953 so if anyone knows what construction methods were used
>back then and has any info please let me know. I'm just hoping its not
>some type of asbestos, or something else that is hazardous.
>
>Thanks,
>LW

It may be the form they poured the walls in. There is a fairly new
construction technique where they stack foam blocks with spacers built
in them to form the wall, then they pour the center solid.


Posted by Edwin Pawlowski on August 14, 2005, 1:44 am




>
> It may be the form they poured the walls in. There is a fairly new
> construction technique where they stack foam blocks with spacers built
> in them to form the wall, then they pour the center solid.

ICF's, (Insulating concrete forms) are getting very popular. Makes a very
energy efficient house also.
www.integraspec.com
www.standardicf.com




Posted by Rudy on August 13, 2005, 10:34 pm


I had a chunk of that stuff when I was a kid. Like pumice or a volcanic
black glass and it did stink.
Now I know what it was for..Sorry I cant help but I know what you're talking
about

>I have a house that has all exterior walls made from poured concrete,
> no wood framing at all. The insulation on the interior is something
> I've never seen before and looks to be actually part of the form to
> pour the concrete into. It is black in color, very porous yet solid,
> lightweight, about 2" thick, and crushes very easily - even between two
> fingers. When it is crushed it turns to a sandy texture and emits a
> foul odor, kind of like rotten eggs. My first thought was pumice, but
> this comes in one foot wide by four foot long sheets.




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