Outdoor pipe insulation [RE-wrenches]

[Darryl Thayer]

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The problem I have had with fiberglass it gets wet and
holds the water causing a loss of insulation value. 
Daryl 

--- Kurt Nelson <sunwise at cheqnet.net> wrote:

>  
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> I've had bad luck with Armaflex.  It not only photo
> degrades, it also
> does not hold up well to temps nearing 200'F.  Tight
> elbows and
> compressed areas (where taped) start to shrink/melt
> as low as 180', even
> though I think it is rated to something like 208.
> 
> My last job I used standard fiberglass (one inch
> wall) with the PVC
> jacketing and pre-formed elbows and such.  Don't use
> the tape for the
> jackets, rather small wipes of PVC cement.  Pricey,
> but rated to
> something like 1,200'.
> 
> Kurt Nelson
> 
> -----Original Message-----
> From: Ken Schaal [mailto:ken at commonwealthsolar.com] 
> Sent: Sunday, October 24, 2004 12:41 PM
> To: RE-wrenches at topica.com
> Subject: Re: Outdoor pipe insulation [RE-wrenches]
> 
>  
> 
> 
> For really effective UV protection for Armaflex and
> Rubatex  ,
> I use fibered duct mastic, which can be tinted with
> latex paint
> .Virtually
> permanent.!  Be sure to compress the insulation some
> as it shrinks [
> shortens ] with time and temperature, thus causing
> gaps at the joints.
> Be sure not to use the polyethylene insulations for
> exterior or any pipe
> that might see 212+, as it will melt.
> 
> Ken Schaal
> 
> 
> 
> 
> 
> 
> Brad,
> Armaflex and Rubatex are the long-time standards,
> usually available
> through
> plumbing suppliers or Smitty. Paint it with exterior
> latex paint for
> protection against UV degradation.
> Allan at Positive Energy
> 
> ----- Original Message ----- 
> From: "Brad Bassett" <bsbassett at earthlink.net>
> 
> 
> Hi,
> 
> I'm looking for some high quality, easy to install
> pipe insulation for
> outddoor use on solar thermal panels. What is there?
> Where to get it?
> 
> Brad Bassett
> AEE
> 
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