[Greenbuilding] wall envelope - rainscreen

[Alan Abrams]

SCRUNCH  (skrʌntʃ)  V.T.  To deform an object, posture, or face, by some
means of compression, distortion, bad taste or smell, etc.

the "ban" was the prohibition against hanging siding from furring strips
over foam, in John Salmen territory.

Speaking of John, who, as Lincoln would have it, is "the one who commenced
this fuss" -- my project manager just walked in a few hours ago and handed
me a brochure for "RainDrop Green Guard Building Wrap" by Pactiv.

The product is "scrunched" in some fashion to provide drainage channels, "no
matter how tightly cladding is nailed to the wall."  16 perms.  15 mils
thick.

There you have it.

AA



*Alan Abrams**
Abrams Design Build LLC*
*A sustainable approach to beautiful space*
alan at abramsdesignbuild.com
www.abramsdesignbuild.com
*202-726-5894 o
202-437-8583 c
202-291-0626 f*




On Fri, Oct 15, 2010 at 9:55 AM, RT <ArchiLogic at yahoo.ca> wrote:

> On Fri, 15 Oct 2010 08:52:40 -0400, Alan Abrams <
> alan at abramsdesignbuild.com> wrote:
>
>  would the roxul in this case be rigid
>> enough to scrunch down furring strips against its surface, and stay like
>> that for a while, to support horizontal siding?
>>
>> this of course presumes the ban against furring over exoinsulation does
>> not have a lot of merit.
>>
>
> Huh ? "Scrunch" ? Vass iss dis "scrunch" ? Don't know "scrunch". (Sounds
> like a sugary kiddies breakfast cereal)
>
> And "ban against furring over outsulation" ? I didn't know there was a ban.
>
> But taking a stab into the dark...
>
> Would the word "Z-channels" be of any use here ?
>
> (They are often used here in MooseLand with the semi-rigid mineral wool
> boards to provide attachments for siding.)
>
> WRT the ban on furring strips:
>
> What is the intent of the ban ? Does it have to do with concerns about
> creating leetle chimneys for fire that would schwoop up and make short work
> of foamed plast-eccchh! outsulation and then result in the whole exterior
> falling off in a spectacular flaming mess ?  (I just made that up but it
> sounds pretty good. Eh ?)
>
> If so, the ban may not apply to Roxul since it doesn't burn and the use of
> Z-channels would make the point moot anyway since there would be no air gap.
>
> --
> === * ===
> Rob Tom
> Kanata, Ontario, Canada
> < A r c h i L o g i c  at  Y a h o o  dot  c a >
> manually winnow the chaff from my edress if you hit "reply"
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