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

Paul Raymer posted an event
Thumbnail

MA Crew Chief/BPI Building Analyst Training at Bristol Community College at Commonwealth Landing

September 12, 2016 at 9am to September 16, 2016 at 4:30pm
Bristol Community College has created a hands-on training cabin in their laboratory.  This class…See More
1 hour ago
Daniel Morrison replied to John Nicholas's discussion Slab Edge Insulation - A Side Thread to Melissa's Question
"John, I just collaborated with Steve Baczek on a few videos for ProTradeCraft about slab insulation…"
8 hours ago
Profile IconMichael Sumpter and Bill Gartner joined Home Energy Pros
yesterday
Malcolm Jackson joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
yesterday
Amber Vignieri liked tedkidd's discussion What if more efficient homes were actually worth more?
yesterday
Amber Vignieri posted a blog post
yesterday
Eric Kjelshus replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"I have been using air advice for 5 yr or so - I end up with a report in 35 min I can e-mail or show…"
yesterday
Profile IconShane Matteson, Jay Cooper and Mike Harris joined Home Energy Pros
Thursday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service