Yes, this is very helpful and thank you very much. On Dec 29, 2009, at 9:07 AM, Dale Leavens wrote:
> Hi Scott, > > Some of the modern spray-in foams are probably a little better than glass > fiber but they can be pretty expensive to have installed particularly a small > area like you describe. The main advantage is that they will fill the space > snugly and completely and in the process probably help seal some air > infiltration points. This will require an installer though so a small area > becomes relatively expensive. > > Sealing all air infiltration leaks is the first an most helpful. This might > include where the wall meets the floor if you can get some access to that. > > The main advantage to using fiberglass bats is that you can more easily fit > them into the spaces if you cut and fluff them with care. Snug but not tight > or compressed. > > If the joist bays run over the basement wall then my advice is to extend the > bats through the bay space a foot or more over the basement wall so you are > insulating some part of the floor over the edge of the basement. Don't be shy > to fill the entire bay, if a 2 by 10 bay then fill it with fully 10 inches of > fiber glass. Depending on the design and how much exterior wall extends below > the floor you can install what ever thickness of extruded foam board under > the fiber glass to hold it up under the floor and to form another contiguous > layer of insulation over the under side of the joists. This will hold the > fiber glass up into the bay space and provide some insulation to reduce the > thermal bridging through the wooden joists. > > I have a similar situation to yours, where I extended the master bedroom out > over the first story wall by 2 feet. I filled the space with fiber glass and > had room for 3 and a half inches of the blue foam under then strapping and > soffit. We have had it as cold as minus 40 with no perceptible additional > cold on the hardwood floor along the edge of that room. Mind you the poly air > barrier up the wall also wraps under the fiber glass and on up the second > story wall as well then on up over the ceiling. > > Hope this is helpful. > > If I was Han Solo I'd probably pet my wookie > > ----- Original Message ----- > From: Scott Howell > To: [email protected] > Sent: Tuesday, December 29, 2009 8:35 AM > Subject: [BlindHandyMan] insulation question > > Hi all, > > I have a question about a type of insulation that would best fit this > specific application. I don't know if this particular application is so much > unique, but any thoughts are appreciated. > The way my house sits on the foundation, results in one section hanging over > the basement walls by about 14 inches or so. When I first moved here there > was no insulation and you can bet the floors in the bedrooms over that short > area got quite cold. So, I stuffed some insulation in there and can't recall > what R rating etc. is in there, but it is faced. So, I'm thinking that > perhaps I'll add or replace that insulation with something, which may be even > more effective. So, I'm looking for some ideas for what might be a proper > insulation such as maybe attic insulation? Would the fiberglass be best in > this application or some of that foam material or maybe a combo of the two? I > think what is there does help, but I've noticed some cold air getting in, so > I wanted to remove what is there, inspect, plug any holes or gaps and then > re-insulate. > > THanks, > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] ------------------------------------ Send any questions regarding list management to: [email protected] To listen to the show archives go to link http://www.acbradio.org/pweb/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=33&MMN_position=47:29 Or ftp://ftp.acbradio.org/acbradio-archives/handyman/ The Pod Cast address for the Blind Handy Man Show is. http://www.acbradio.org/news/xml/podcast.php?pgm=saturday Visit The Blind Handy Man Files Page To Review Contributions From Various List Members At The Following address: http://www.jaws-users.com/JAWS/handyman/ Visit the archives page at the following address http://www.mail-archive.com/[email protected]/ If you would like to join the JAWS Users List, then visit the following address for more information: http://www.jaws-users.com/ For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: [email protected]! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/blindhandyman/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/blindhandyman/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
