Rim Joist Insulation - Insulation - Page 2 - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Insulation


Thread Tools Display Modes
Old 05-16-2012, 05:40 AM   #16
Join Date: Oct 2011
Location: Ohio
Posts: 2,780
Rewards Points: 2,516

Originally Posted by GBR in WA View Post
Is there soffit venting, as I don't see the air chutes there?

You can see the air chutes better in this before photo. WIth the new pink insulation you cant see the chutes from the angle I took the photo but the chutes are definitely not blocked.


Last edited by hammerlane; 12-04-2013 at 12:10 PM.
hammerlane is offline   Reply With Quote
Old 05-16-2012, 07:57 AM   #17
Exterior Construction
Windows on Wash's Avatar
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 16,310
Rewards Points: 5,554
Blog Entries: 5

Looks good.

Not sure why they wouldn't use blown in but that is my only question/concern with it.

They insulation schedule looks fine but blown in cellulose is so much easier and better.
Windows on Wash is offline   Reply With Quote
Old 05-16-2012, 03:09 PM   #18
Registered User
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526

Chutes are there! You are almost done.....

Have you seen a hot-air balloon rise on the thermals, then sink back down when the air temperature rises past early morning? There are convective loops in your (all) attic when temperature differences exist. The sun heats the roof deck/house to start the loops. If you blocked the holes from wiring/plumbing from the basement/crawl which help cause the "stack effect", you will be ahead of the game.http://www.wag-aic.org/1999/WAG_99_baker.pdf

Some of the remaining attic heat will be removed by the intake/exhaust venting, but you still have convective looping above your f.g. insulation--- Fig. 7"h"; http://digitalcommons.unl.edu/cgi/vi...ventilation%22

Read "Conclusions", pp.9 and 10 above--- you will always have convective loops over your batts which are------ air-permeable (goes through it like a sieve). http://findarticles.com/p/articles/m...6/ai_n8582994/
You do have the heat from below countering the wind-washing... somewhat. Also if you used high-density batts rather than low-density; The "biggest loser" in fiberglass insulation....

My point: cover the batts with a housewrap like Tyvek for an air-barrier or 3" of cellulose insulation (blanket); to prevent cool air from degrading it's R-value.

If any ads are present below my answer or words underlined/colored, I do not condone/support/use the product or services listed/linked to, they are there without my consent.
17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
Gary in WA is offline   Reply With Quote
Old 05-17-2012, 07:27 AM   #19
Exterior Construction
Windows on Wash's Avatar
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 16,310
Rewards Points: 5,554
Blog Entries: 5

+1 Gary.

Another reason that fiberglass is a PITA in my world. Blown in cellulose is a 1 stop deal.
Windows on Wash is offline   Reply With Quote
Old 07-29-2012, 09:48 AM   #20
Join Date: Jul 2012
Posts: 4
Rewards Points: 10

my basement rim joists are insulated like the pic from hammerlane- unfaced fiberglass stuffed in. Is this bad? The house is 32 years old. Of what I've pulled out, I don't see any moisture issues. It looks like you guys like to use the foam panels and foam/caulk to seal out moisture. This would take me forever with the hvac vents and electrical running thru. I would just like to replace the unfaced fiberglass to make it look nicer...and add more. Some original areas are half full...just stuffed in/or one small piece...looks messy. Lots of cobwebs, etc. I want to use the pink to make it look new and clean(yeah, im nuts). I'm worried about moisture after reading some posts. Also, if I fill up the whole cavity(maybe 2 ft. deep), is there any issue of over-insulating? I did a few with unfaced r-30 and was able to put in about 3 pieces. It looks nice and clean.....I just dont want to cause any damage. I'd appreciate any advice. Thanks.


ANDYK. is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Floor joist insulation help Drewkernovich Insulation 3 01-05-2012 09:50 AM
insulation of rim joist sherryne Building & Construction 1 01-04-2011 12:12 PM
Floor joist insulation Arky217 Building & Construction 0 12-29-2010 11:56 AM
Jacking and Sistering Floor Joist Captain.Sassy Building & Construction 17 08-11-2010 01:30 PM
Rim Joist Insulation ja191992stg Building & Construction 53 03-22-2010 08:41 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1