[Greenbuilding] (no subject)

[Bruno M.]

Gary,

Some info on XPS : www.xpsa.com/

See also :
Isofoam South Africa (Pty) Ltd    www.isoboard.com/
Insulpro - Insulation Products     www.insulpro.co.za/

Could't find a quick link for Owens Corning ( pink stuff ) ,  Dow ( 
Styrofoam XPS,  blue stuff )
or BASF ( Styrodur, aka green stuff ) distribution, ... in South Africa.

Grts
Bruno M.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 23:20 29/10/2007, Lawrence Lile wrote:

>Yes, XPS stands for Extruded Polystyrene.  It is a closed cell
>insulation that doesn't mind moisture. Usually I've seen it in a blue
>board, with a smooth surface, rather strong for a foam.
>
>There is also an Expanded Polystyrene, which has the disadvantage of not
>being closed cell, so it can sop up moisture.  Usually it is a white
>beadboard, and seems to be kind of fragile, with a mottled surface.
>
>XPS Extruded polystyrene is commonly used below grade.  It hates sun,
>and termites can chomp through it, other than that it is pretty good
>stuff, for plastic.
>
>Lawrence Lile, PE, LEED AP
>Project Solutions Engineering
--------------------------------------------------------------------------
>-----Original Message-----
>From: Gary Viljoen [mailto:gary at humanworks.co.za]
>Sent: Friday, October 26, 2007 12:52 PM
>To: Lawrence Lile
>Subject: RE: [Greenbuilding] (no subject)
>
>Thanks Lawrence,
>Is XPS a polystyrene-based material?  Don't know how to source it 
>here in South Africa.
>Gary
>
>-----Original Message-----
>From: Lawrence Lile
>Sent: 26 October 2007 05:10 PM
>Subject: Re: [Greenbuilding] (no subject)
>
> >The straw will likely get damp, rot and provide no insulation, and
>promote mold growth. Perhaps a foam, like polyisocynurate, or pumice or
>perlite will be more effective.
>
>-Rob Vadurro AIA, LEED AP
>
>I'd agree, a non-rottable, less moisture sensitive insulation would be
>best between masonry layers.  XPS (the blue stuff) would be my pick, but
>polyisocyanurate (the foil stuff) would work fine, too.  XPS would allow
>a little moisture transmission, which might be an asset, whereas
>foil-faced is a moisture barrier, and might not allow things to dry out.
>
>Top build with straw, you need to design the building from the ground up
>to be a straw building - deep overhangs, straw up away from grade,
>structure planned for a material that can shrink vertically.  Straw
>isn't really very good insulation, but it is cheap so it is easy to buy
>a two foot thick section of it.  A few inches of straw, IMHO, would not
>be worth much.
>
>--Lawrence Lile
========================================================== 


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