[Greenbuilding] attaching 2" rigid foam

[Alan Abrams]

if the exterior walls are considered to be "braced wall panels," then the
IRC requires "gypsum wall board installed on the side of the wall opposite
the bracing material." I have little doubt that glued and screwed polyiso
with GWB on the interior would be an adequate substitute, but I'd clear it
with a structural engineer or your building dept, before going forward.

-aa

Alan Abrams, CPBD, AIBD
*Associate Designer Helicon Works Architects
<http://www.heliconworksarchitects.com/>*
*Certified Passive House Consultant PHIUS <http://www.phius.org/home-page>*
*Certified Professional Building Designer, American Institute of Building
Design <http://aibd.org/> *

*President, National Council of Building Designer Certification
<http://ncbdc.com/>*
cell     202-437-8583
alan at abramsdesignbuild.com




On Wed, Nov 30, 2016 at 5:14 AM, Lynelle Hamilton <lynelle at lahamilton.com>
wrote:

> I used a nail with a green plastic ring/washer to attach rigid board here.
> Worked well.
>
> Lynelle
>
> On 2016-11-30 2:50 AM, Reuben Deumling wrote:
>
> I got what seemed to me like a great deal on a bunch of 4'x4' panels of
> rigid foam at my local Habitat ReStore. It is apparently actually 1.8"
> thick and labeled as Polyiso Roof Insulation (=R10.3). The backing is some
> sort of fuzzy paper. I was planning on attaching these panels to the inside
> of a fiberglass batt insulated 2x4 stud wall, figuring I'd get a bit more R
> without the extra thickness of another stud wall. Are there nails or screws
> with large washers that are used with these? Can I glue sheet rock to the
> exposed face? Or is there some other method recommended?
>
> Thanks for any and all suggestions.
>
> Reuben
>
>
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