[Greenbuilding] Question about attic insulation
Jeff Martin
jeff at open2learn.ca
Fri Jul 6 10:45:10 CDT 2018
Lynelle,
>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.
Jeff
Sent from BlueMail
On Jul 6, 2018, 9:03 AM, at 9:03 AM, "Lynelle A. Hamilton" <lynelle at lahamilton.com> wrote:
>Hi All,
>
>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.
>
>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.
>
>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.
>
>I've no concern about the ability of either contractor to appropriately
>
>install.
>
>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.
>
>Any thoughts, folks?
>
>Thanks in advance!
>
>Lynelle
>
>
>
>---
>This email has been checked for viruses by Avast antivirus software.
>https://www.avast.com/antivirus
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Greenbuilding mailing list
>to Send a Message to the list, use the email address
>Greenbuilding at bioenergylists.org
>
>to UNSUBSCRIBE or Change your List Settings use the web page
>http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20180706/87c4828f/attachment.html>
More information about the Greenbuilding
mailing list