sealed soffits near fan exhaust

sealing some soffits to fix ice damming

Views: 769

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Adin Maynard on July 30, 2011 at 4:47am
Bryce, thanks for the comment. Yes the flat was fully airsealed and brought up to R-60 with cellulose.  Each standard chute vent was improved, as can be seen in far left bay in image above. The few soffits near the bath fan were sealed to prevent exhaust air from bring brought back into the attic.  THere was plenty of 'low/high' ventilation, so this approach was taken. 
This past winter was crazy for ice damming. As a result, for attic retrofits, we are careful to improve and maintain soffit vents whenever possible.
Comment by Bryce Cramer on July 29, 2011 at 10:52am
Not sure if I understand how sealing the flow of air through the soffit will reduce ice damns. The better approach would be to stop the heat loss through the attic floor with a better insulation job. Then provide proper ventilation so that the roof deck remains cold and does not therefore melt snow that refreezes over a cold soffit. If the bathroom vent is just vented into the soffit area, I would think this would cause additional issues. The warm air (moist) air will hang inside the soffit area since the soffit is now sealed from the rest of the atiic....this should lead to moisture, mold and other problems in the roof deck above this soffit area.

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Anna commented on Mary Desilva's blog post Finding Professional Water Damage Restoration Services
"Mary Desilva thanks for sharing such a great article. I always think why we  should hire…"
2 hours ago
Profile IconNathan St.Germain, Lisa Sweet and Kevin joined Home Energy Pros
3 hours ago
Michael Dunseith's photo was featured
16 hours ago
Adrian Sheils's photo was featured
16 hours ago
Tom White replied to Quinn Korzeniecki's discussion BPI Phrase of the Month: Building Envelope
"Quinn, would you be willing to cross-post Matt's entire article to the HEPros forum?  We…"
16 hours ago
Diane Chojnowski's discussion was featured
16 hours ago
Tom White replied to Jan Green's discussion Retrofitting a 1979 Home to NAHB Silver or Gold - Pending Cert
"Jan, Thanks for sharing the details in your comments. I'm glad we got to meet at RESNET this…"
16 hours ago
Jan Green's discussion was featured

Retrofitting a 1979 Home to NAHB Silver or Gold - Pending Cert

I'm excited to be the lone speaker for the last in a series of lectures for the Scottsdale Green…See More
16 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service