Tom Walther
  • Portland, OR
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Dense pack cellulose in enclosed rim joist
24 Replies

Hey all,We recently hired a new tech that has previously done a bunch of Home Performance work on the East coast and he has turned me on to a new idea on how to insulate a basement rim joist that is…Continue

Started this discussion. Last reply by Tom Walther Nov 9, 2012.

Any thoughts on the Aeroseal product?
15 Replies

Has anyone had experience with the Aeroseal duct sealing product? I am aware of how it works, but I wanted to see if there are any pros and cons regarding this method of duct sealing.…Continue

Started this discussion. Last reply by Bob Blanchette Aug 23, 2012.

 

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Latest Activity

Tom Walther replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Wow thanks for all the advice! I think this is enough info to prove that this is a valid strategy."
Nov 9, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Something is screwy with the site tonight We use OSB to seal the edges of things like soffits, and extruded styrofoam to seal the tops for energy,  We use the foam to cover the backs of kneewalls, and use it to fabricate top and bottom plates…"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"can you be specific - I am not seeing it"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"In what way are we not complying with the code?"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"In what way are we not complying with the code?"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"In what way are we not complying with the code?"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Practically speaking, we seal all holes less than about 2' with foam.  1/2" OSB does the rest.  We foam gypsum common wall gaps at framing, gaps between double walls, and most items.  Average house will have 3-4 places where…"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Robert: This is an interesting and confusing area.  Acceptable fIreblock materials are specifically spelled out by the code and then it adds "other approved materials".  Dow came out with orange foam in 2004 as the first of these…"
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Fireblocking is much simpler using any of the single part spray foams - even Great Stuff from the big box stores is an approved fireblock material.  And my understanding is that for fireblocking, there is no required depth - but there is for…"
Nov 3, 2012
Richard Scott Mills replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"It would be great if someone did a video and u-tubed it.  "
Nov 3, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"Robert There is a detail for a firewall in multifamily housing that allows cellulose.  Your inspectors are correct."
Nov 1, 2012
Robert Riversong replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"I design and build new balloon-framed two-story homes, densepack the 12" thick double walls, use the air-tight drywall system and get them down to about 2 ACH50. I've had three building inspectors let me use the cellulose as a firestop in…"
Nov 1, 2012
Joseph J. Ilacqua replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"I agree with Robert, burlap is the way to go. You have to control the back pressure of the application by letting the air escape or you will not achieve the 3.5-4.0 for dense pack"
Nov 1, 2012
Robert Riversong replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"You need a bag that allows air to pass through, such as the burlap bags described above, otherwise the air and cellulose blows back in your face and you can't dense-pack."
Nov 1, 2012
Jim Baerg replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"How about this idea that I saw used on mid-floor balloon framed floors;  in the basement ceiling, drill a 2-1/2 to 3" hole in each bay adjacent to the foundation, insert a poly bag into the hole leaving the open end of bag down…"
Nov 1, 2012
Ed Minch replied to Tom Walther's discussion Dense pack cellulose in enclosed rim joist
"We do this technique with success.  We buy burlap bags for about 80 cents each - the ones I use are 22" wide by 22" deep, just folded and stitched along the sides.  If there will be re-finishing to a higher standard in the…"
Nov 1, 2012

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Company
Pyramid Heating and Cooling
Professional Certification
BPI
Professional Interests
To offer high quality service and effective strategies regarding energy retrofit projects.

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At 7:10am on March 14, 2012, Diane Chojnowski said…

Hi Tom,

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo. And add your location on our Member Map!


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