What sort of leakage reduction could I expect if I try to plug all these tiny gaps?

This is a typical cathedral ceiling around these parts, 2x6 tongue and groove over 4x beams. In this image we're looking at a big valley rafter running diagonally in front, with a beam in the background at right. There are a couple of can lights and a couple of skylights in there too. This is after about 30 minutes with the door running and a 20 degree delta T. All of the beams have strips of trim, about 3/8" x 1", nailed on with brads. Lots of air comes out from behind that trim, where boards end. Relatively little comes out in the field, apparently because there's poly sheeting behind the 2x6.

It would be possible to pull each piece of trim with a flat bar, pull the nails, caulk behind it, drill a hole into each joint, inject more caulk in hopes of sealing the tongue/groove, and renail the trim. Some of this stuff is 16 feet in the air above the grand piano, really hard to get at. 

Ever done a test-in, test-out on leakage like this? Did you get big results? This house is well around 2 CFM50 per square foot, so it needs a major reduction.

Views: 192

Attachments:

Reply to This

Replies to This Discussion

I have sealed this before. IMO, it would be easier to run two beads of caulk on each side of trim rather than removing the trim piece. Unfortunately I didn't individually test the measure when I did the job, so I am not sure how much that contributed.

Hi David,

I've worked above expensive furnishings and either everything has to be moved or protected.  Drop that flat bar and no one is going to be happy.  Thus, I might consider the back door approach.  Do everything else and what is left is some base amount plus that ceiling.  If you can isolate that room in any way, some zone pressure readings might help identify how much is coming from where.  Again, even if you can't read that space, maybe you can read others.  Divide and conquer.

Bud

RSS

Videos

  • Add Videos
  • View All

Latest Activity

Kevin Daly 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
2 hours ago
Bryan Gabriel replied to Larry Nissman's discussion Strange IR Image
"Is this a close up or broad view?"
2 hours ago
Kevin Daly is now a member of Home Energy Pros
3 hours ago
Home Energy Magazine posted a blog post
6 hours ago
Ashique Ibrahim posted a status
"Hello everyone.Please suggest a software to carry out analysis of energy auditing."
10 hours ago
Ashique Ibrahim posted a status
"Hello guys. I am student im doing my project on emergy auditing and benchmarrking. Please suggest the best software to do the analysis."
10 hours ago
Adin Maynard replied to Adin Maynard's discussion 2x DG-700 manometers for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes, one is still available ."
yesterday
Mark Thomas replied to Adin Maynard's discussion 2x DG-700 manometers for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Very interested in purchasing a dg 700. still availible please let me know asap. Thanks!"
yesterday

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported by the U.S. Department of Energy) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service