sealed soffits near fan exhaust

sealing some soffits to fix ice damming

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.

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Sean Lintow Sr commented on Chris Laumer-Giddens's blog post Mini-Split Heat Pumps are Quirky, Especially their Capacity
"Quick question Chris - the set & forget (for temperature setbacks) is that with any or just…"
9 minutes ago
Martin Smith joined Hal Skinner's group
Thumbnail

The RCC Classroom (Radiant Control Coatings)

A group where energy professionals can learn about all the different energy saving aspects of…See More
2 hours ago
Anthony Cox added a discussion to the group Job Board
Thumbnail

PROJECT MANAGER/BUILDING SCIENCE TRAINER Community Housing Partners Christiansburg, VA

We are hiring and below is link to apply for the position we have available at Community Housing…See More
2 hours ago
Anthony Cox joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
2 hours ago
Profile IconBrendan Reid, Brian Keech, Bob Reuther and 1 more joined Home Energy Pros
4 hours ago
Hal Skinner added a discussion to the group The RCC Classroom (Radiant Control Coatings)
Thumbnail

Improved acoustics

Some RCCs claim to improve acoustics .  Here are a few examples of ours.…See More
yesterday
Patrick Carter replied to Patrick Carter's discussion Minneapolis Blower Door & Test Equipment for Sale! in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"As of yesterday 09/19/2014, the equipment has been sold..."
Saturday
Hal Skinner replied to Hal Skinner's discussion An example of what an RCC can do with no R- insulation in the walls.
"Mornin Brett. 90 to 85, yes a slight variance there.  Same ASTM test, different scientists,…"
Friday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service