[TheForge] Concrete forms OT, but important... for me anyhow.

[Dan Brewer]

Isnt expanded polystyrene the same stuff that foam coffee cups are made
of?  White beads?
Dan in Auburn



On Thu, Aug 14, 2014 at 12:08 PM, <wmullett at bright.net> wrote:

> I can't believe they are still selling this stuff as foundation walls.  If
> these are expanded polystyrene forms (most are), then they are worthless as
> insulation in below grade installations.  Expanded is open cell - that lets
> water in and the insulation value is then gone.  Only extruded polystyrene
> is suitable for below grade.  Save your money and don't use this junk.
>
> ---- Original message ----
> >Date: Wed, 13 Aug 2014 22:36:52 -0400 (GMT-04:00)
> >From: "TheForge" <theforge-bounces at mailman.qth.net> (on behalf of K
> Mayer <mayerk at surfree.com>)
> >Subject: Re: [TheForge] Concrete forms OT, but important... for me anyhow.
> >To: theforge at mailman.qth.net
> >
> >>Date: Sun, 10 Aug 2014 20:20:43 -0400
> >>From: Andrew Vida <osan at netlabs.net>
> >>
> >>The excavation under the house is now more or less complete.  I removed
> >>about 400 yards of clay from under and just outside the house.
> >[snip]
> >
> >Have you considered using styrofoam forms?  Stack them with the steel,
> then fill with concrete.  When the concrete cures you have an insulated
> wall.  Google "ICF concrete forms".  You'll need to cover the inside with
> gypsum board if its living space, protect the outside below grade with any
> one of the drainage systems, and cover the above-grade portion with a
> finish system.
> >
> >Ken
> >:-)
> >
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