[Greenbuilding] ***SPAM*** Re: Remodeling concerns

[Mike O'Brien]

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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