[Greenbuilding] best practice

[Matt Dirksen]

Has the architect done a vapor profile to confirm that adding the foam won't raise the risk of vapor hitting its dew point inside the wall? It would sure suck if rotting occurred somewhere in the assembly, due to adding the foam. Due to hygrothermic analysis, it ain't just about R-value any more.

Matt

> On Mar 16, 2016, at 9:42 PM, Sacie Lambertson <sacie.lambertson at gmail.com> wrote:
> 
> A good guy and relatively young architect (in his 40s, 'young' by my standards), tells me it is not worth taking off the siding of an old 1883 house to add insulation and an air space to the outside.  He says the added expense is not worth the additional insulation. That the extra R-value above R 23 in walls is thermodynamically not money well spent as long as the house is very tightly constructed in the retro-fit.
> 
> The siding is original and in very good shape.  The interior has full dimensioned 2x4 walls.  The rooms are too small for me to want to build a double wall on the interior.
> 
> What he suggests I do is simply used closed cell foam between the wall framing.
> 
> I would appreciate your comments please.
> 
> Sacie
> 
> 
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org
> 
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20160317/ec6ad65c/attachment.html>