[Greenbuilding] Crawlspace foam insulation -- how much?

[Benjamin Pratt]

Lesley,
the only experience I have with crawl spaces in further south than you. But
don't you need to leave plumbing and other utilities accessible?
Ben


b e n j a m i n p r a t t

professor art+design
the university of wisconsin stout

On Fri, Jun 12, 2015 at 1:18 PM, Frank Tettemer <frank at livingsol.com> wrote:

> Hi Leslie,
>
> You may want to re-consider the idea of foaming the floor in a crawl
> space. My concerns would be that the foam would act too well as a vapour
> barrier, and you may have moisture/mildew problems down the road in the
> crawl space. I AM in Canada, so your geographic climate might create
> different problems than here.
>
> I always design any neccessary crawl spaces as a definite part of the
> conditioned space of the home. That means insulating the walls and the
> floor of the crawl space, and leaving the floor as a vapour-open plane, as
> well as including the crawl space in the heating design. This avoids
> condensation trouble, by keeping the air warm and dry.
>
> Frank
>
> Frank Tettemer
> Living Sol ~ Building and Design
> www.livingsol.com
> 613 756 3884
>
>
>
> On 12/06/2015 2:02 PM, Leslie Moyer wrote:
>
>> I am in NE Oklahoma.  I'm in the process of getting estimates for
>> crawlspace insulation in the floor joists--closed cell foam.  My crawl
>> space is dry now that we've fixed some plumbing problems, but I'm having
>> some cupping issues with some wood flooring and part of the fiberglass
>> batts that were originally in the house when we bought it were taken out
>> over time for this and that. Anyway--closed cell foam seems to be the best
>> solution.
>>
>> The first guy who came this morning wants to quote me 1.5" foam, though
>> said he would quote 2" if that's what I really want, saying that would be
>> enough for "Canada".  I understand about the benefits of air sealing, but I
>> was still thinking I would need more inches of foam according to what I've
>> read on R-value & this area.  Thoughts?
>>
>> --
>> *Leslie Moyer*
>>
>>
>>
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>
> --
>
>
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