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John,<br>
<br>
Great question. It's a brave new world....<br>
<br>
Try one or more of these... as appropriate for your building:<br>
<br>
1. Pressurize the building (works best on a small building with a
blower door). On a large building, carefully reduce exhaust air relief
to obtain certain indoor-to-outdoor positive pressure. Do not overdue
this as your ducts might fail. Then when positively pressurized
(verified by observing smoke at openings at bottom and top of building
on all four compass directions), check calculated leakage area based on
total air supply and return flows (accurate measurement is non-tirival
and not for amateurs. <br>
2. While under substantial positive building pressurization, use
smoke tubes or incense at suspect locations and observe direction of
flow.<br>
3. Thermographic (IR) imaging MAY be helpful in identifying leakage
points - need significant indoor-outdoor delta-T<br>
4. See the work of Terry Brennan (Camroden Associates) on the pencil
test for tracing the moisture barrier<br>
5. Use tracer gas decay (air change rate measurement methods) to
check air leakage with mechanical system off and <u>all</u> openings
closes.<br>
<br>
If any or many of these things work, or if you have other means, share
your knowledge with us all.<br>
<br>
Thanks,<br>
<br>
<i>hal levin</i><br>
<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:bldg-rate-request@lists.onebuilding.org">bldg-rate-request@lists.onebuilding.org</a> wrote:
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Today's Topics:
1. Building envelope commissioning (John E. Beeson)
----------------------------------------------------------------------
Message: 1
Date: Wed, 12 Nov 2008 11:25:35 -0500
From: "John E. Beeson" <a class="moz-txt-link-rfc2396E" href="mailto:jbeeson@quinnevans.com"><jbeeson@quinnevans.com></a>
Subject: [Bldg-rate] Building envelope commissioning
To: <a class="moz-txt-link-rfc2396E" href="mailto:bldg-rate@onebuilding.org"><bldg-rate@onebuilding.org></a>
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<a class="moz-txt-link-rfc2396E" href="mailto:E4DA7CC709C64F418C163E11980245B9010E41C6@a2xeon.quinnevans.com"><E4DA7CC709C64F418C163E11980245B9010E41C6@a2xeon.quinnevans.com></a>
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<pre wrap="">Anyone had any experience with this?
We are installing a spray-on air-barrier within our building thermal
envelope. We'd like to ensure proper installation and some form of
verification that it is working.
For the basic wall areas, it seems straight forward: the spray-on
air-barrier is continuous and complete.
For other areas (penetrations, junctions, openings, etc), it seems
harder to identify roles and responsibilities for verification of a
continuous barrier.
Anyone had experience with this?
John
P.S. Apologies for any cross postings.
QUINN EVANS | ARCHITECTS
John E. Beeson, LEED AP
219 1/2 N. Main Street
Ann Arbor, MI 48104
<a class="moz-txt-link-abbreviated" href="mailto:jbeeson@quinnevans.com">jbeeson@quinnevans.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.quinnevans.com">www.quinnevans.com</a>
d 734 926 0425
v 734 663 5888
f 734 663 5044
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