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<p><font size="-1"><font face="Verdana">Hi Lynelle, <br>
<br>
<font face="Verdana">I hope you consider <font face="Verdana">cellulose.
Using cellulose, especially the brands manufactured that
use recycled newsprint, will off-set climate change
immediately, by sequestering a few tons of carbon in your
attic. Using foam immediately sends carbon into the
atmosphere during it's manufacturing, and during it's
spraying, and sequesters nothing except future land fill
and slow petrochemical breakdown over the next while.
Cellulose is a winner, and always worth considering into a
reno or design.<br>
<br>
<font face="Verdana">My 2 cents<<br>
<font face="Verdana">Frank Tettemer</font></font></font></font></font></font><br>
</p>
<br>
<div class="moz-cite-prefix">On 2018-07-06 12:54 PM, Norbert Senf
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAGYvK4exYi6gMfYjAMvPyZdBU6rSW08RJkEZe7mK+pnTncjLmw@mail.gmail.com">
<div dir="ltr">It depends on how tight you actually are. If you
are tight, foam won't add tightness. If you are not, it depends
on the height of your building envelope and how much positive
pressure there is at the ceiling to drive exfiltration on a cold
night. Loose pack cellulose won't provide any reduction for
pressure driven exfiltration. ... Norbert<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Jul 6, 2018 at 12:26 PM,
Lynelle Hamilton <span dir="ltr"><<a
href="mailto:lynelle@lahamilton.com" target="_blank"
moz-do-not-send="true">lynelle@lahamilton.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">Thanks, Jeff. I've
never used open cell foam or indeed any foam in an attic
space, so had no idea it was advantageous at all.<br>
<br>
<div class="gmail_quote">On July 6, 2018 11:45:10 AM EDT,
Jeff Martin <<a href="mailto:jeff@open2learn.ca"
target="_blank" moz-do-not-send="true">jeff@open2learn.ca</a>>
wrote:
<blockquote class="gmail_quote" style="margin:0pt 0pt
0pt 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="auto">Lynelle, <br>
<br>
</div>
<div dir="auto">From your description, the area is
already well air sealed and 16 inches or so of
cellulose should provide fairly good resistance to
air infiltration where there are small leaks. I
don't see any advantage to using foam, especially at
twice the price. <br>
<br>
</div>
<div dir="auto">Jeff <br>
<br>
</div>
<div dir="auto">Sent from <a
href="http://www.bluemail.me/r?b=13187"
target="_blank" moz-do-not-send="true">BlueMail</a>
</div>
<div class="gmail_quote">On Jul 6, 2018, at 9:03 AM,
"Lynelle A. Hamilton" <<a
href="mailto:lynelle@lahamilton.com"
target="_blank" moz-do-not-send="true">lynelle@lahamilton.com</a>>
wrote:
<blockquote class="gmail_quote" style="margin:0pt
0pt 0pt 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<p><font size="+1"><font face="Gill Sans MT">Hi
All,</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">Again,
I ask this group for advice! Am insulating
an attic space. It's 720 sq feet. The roof
is a north facing slope and gets a lot of
wind all year, including winter. There is a
48 ft ridge vent and hand-built vents.
Location is Greater Toronto area, so
definitely a heating climate.<br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">We've
installed vapour barrier, in anticipation of
using blown in cellulose to attain R60.
We've been careful to seal all openings,
including the area around the access hatch
and there are no pot lights. The one duct
that runs in the attic (bathroom vent fan)
is insulated. <br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">I've
had two contractors (both in the field for
some time) suggest using open cell (1/2
pound) foam, as it will fully seal the attic
area and allow less heat, condensation, etc.
At R60, it's about twice the price of
cellulose, though.<br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">I've
no concern about the ability of either
contractor to appropriately install.<br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">I've
pored through all of John Salmen's videos
and articles that I can access about best
approach in this setting but confess that
I'm no less perplexed. <br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">Any
thoughts, folks?</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">Thanks
in advance!</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">Lynelle</font></font><br>
</p>
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<br>
-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">Norbert
Senf<br>
Masonry Stove Builders<br>
25 Brouse Road, RR 5<br>
Shawville Québec J0X 2Y0<br>
819.647.5092<br>
<a href="http://www.heatkit.com" target="_blank"
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