sealed soffits near fan exhaust

sealing some soffits to fix ice damming

Views: 748

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.

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Tom White's video was featured

Net Zero Energy Building Definition

Myongji University’s Zero Energy Design Research Group, with the investment provided by MOLIT, City of Seoul and Nowon District, also with research and administrative management by KAIA, is putting efforts into Zero Energy Housing in 2016.
1 hour ago
Diane Chojnowski posted a discussion

Update your Home Energy Pros profile

Home Energy Pros now has over 4800 members and we're growing!To make it easier for you to connect…See More
1 hour ago
Profile IconArpita Basu, mnar taha, Boilers Prices and 5 more joined Home Energy Pros
1 hour ago
Duncan Cumming posted a photo
2 hours ago
Anthony Adams posted a status
"Trying to figure heat load for HVAC on bonus room over a garage. Lots of wall space exposed to arttic."
4 hours ago
Hamed Ghanbari replied to Brian's discussion Everything you need to become a energy auditor for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hello, I am interested to buy a Minneapolis Blower Door DG700. How much is your unit? Thanks. "
16 hours ago
Hamed Ghanbari 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
16 hours ago
Colin Genge updated an event
Thumbnail

Measuring HVAC Performance webinar at Online

February 23, 2016 from 11am to 12pm
If you install, service or test HVAC systems you will want be there for this special webinar.…See More
20 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service