[Greenbuilding] Remodeling concerns

[Norbert Senf]

Foamglass is rigid and does not flex. It will crack if subjected to
flexing. It is commonly used for high temperature insulation around steam
pipes in factories, etc. However, it is also used in industrial roofing.

On Wed, Feb 21, 2024 at 12:43 AM Beatrice Dohrn <beatricedohrn at yahoo.com>
wrote:

> Is it true that foamglass is vulnerable to cracking — that’s my worry
> there. It’s a masonry house (faswall) so things are not so perfectly flat
> and square always…..
> Sent from my iPad
>
> On Feb 20, 2024, at 10:51 AM, Norbert Senf <norbert.senf at gmail.com> wrote:
>
> 
> Check out Owens Corning Foamglas:
>
> https://www.foamglas.com/en-gb/products/fgbt3boards
>
> <image.png>
>
>
> On Tue, Feb 20, 2024 at 12:35 PM Beatrice Dohrn via Greenbuilding <
> greenbuilding at lists.bioenergylists.org> wrote:
>
>>
>>
>>
>> ---------- Forwarded message ----------
>> From: Beatrice Dohrn <beatricedohrn at yahoo.com>
>> To: Green Building <greenbuilding at lists.bioenergylists.org>
>> Cc:
>> Bcc:
>> Date: Tue, 20 Feb 2024 17:29:24 +0000 (UTC)
>> Subject: ***SPAM***  Re: [Greenbuilding] ***SPAM***  Re:  Remodeling
>> concerns
>> I also am facing a very labor intensive repair this spring of a low slope
>> roof insulated with Polyiso, an EPDM membrane over top and sleepers and a
>> deck over that.  Seems that insects have chewed enough tunnels to
>> compromise the integrity of it all.
>>
>> Suggestions for replacement?  Is there rockwool that can be structural at
>> about 7"?  I haven't started research.  The un-install and re-install will
>> be a nightmare and I won't completely know what it going on until I open it
>> all up. I am in Western Oregon (Eugene) and I ain't opening it until the
>> rains leave....
>>
>>
>> Beatrice Dohrn
>>
>>
>>
>> On Sunday, February 18, 2024 at 10:39:57 AM PST, Mike O'Brien <
>> obrien at hevanet.com> wrote:
>>
>>
>> Hi, Ben—
>>
>> Our house plans specified closed-cell foam in our roof, but without
>> asking, our general contractor installed open cell foam. Now, 16 years
>> later, there is rot in the roof sheathing and a very expensive repair job
>> ahead. So I would caution against ever specifying either foam, as a mistake
>> can be catastrophic years later.
>>
>> Best, Mike O’Brien
>> Sent from my iPhone
>>
>> On Feb 18, 2024, at 8:13 AM, Benjamin Pratt <benjamin.g.pratt at gmail.com>
>> wrote:
>>
>> 
>> Hi. I've been on this forum for many years, but I am not an architect or
>> qualified expert.  I came across this article today and had some concerns
>> about this project.
>> 1. By air source heat pump, I assume they mean mini-split(s). I did some
>> calculations rencenty and found that electricity is about 9 times more
>> expensive per therm than gas. Combining with the very cold temperatures we
>> typically get, I imagine The bill will be higher than if they had a gas
>> boiler. Also, they now have to deal with uneven temperatures throughout the
>> house and leaving doors open to all the rooms they want heated.  What do
>> you think?
>> 2. I have read about dangers of using spray foam in an old
>> house--especially the potential for rot.  What do you think?
>>
>> This article reads as an advertisement for doing this sort of remodel
>> without mentioning any of the potential downsides.  I'd love to hear your
>> thoughts.
>>
>> https://www.mprnews.org/story/2024/02/18/renovating-old-1909-st-paul-house-into-all-electric-green-home
>>
>> Ben Pratt
>>
>> --
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>>
>> ---------- Forwarded message ----------
>> From: Beatrice Dohrn via Greenbuilding <
>> greenbuilding at lists.bioenergylists.org>
>> To: Green Building <greenbuilding at lists.bioenergylists.org>
>> Cc: Beatrice Dohrn <beatricedohrn at yahoo.com>
>> Bcc:
>> Date: Tue, 20 Feb 2024 17:29:24 +0000 (UTC)
>> Subject: [Greenbuilding] ***SPAM*** Re: ***SPAM*** Re: Remodeling concerns
>> _______________________________________________
>> Greenbuilding mailing list
>> to Send a Message to the list, use the email address
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>>
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>
>
> --
> Norbert Senf
> Masonry Stove Builders
> 25 Brouse Road, RR 5
> Shawville Québec J0X 2Y0
> 819.647.5092
> www.heatkit.com
>
>

-- 
Norbert Senf
Masonry Stove Builders
25 Brouse Road, RR 5
Shawville Québec J0X 2Y0
819.647.5092
www.heatkit.com
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