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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-19-2013, 10:57 AM   #1
_h9
Newbie
 
Join Date: Apr 2013
Posts: 4
Share |
Default

Insulating old walls top down


Hello.

I have access from the second floor to two fairly un-insulated exterior walls (on the first floor)
I am in Minnesota so it would probably be a pretty significant upgrade adding some sort of insulation.

My walls are "Insulated" with an airspace that has lathe and plaster on both the inside and outside. The interior has sheet rock over the plaster, and the exterior has cement siding. At the bottom between each pair of studs is a big hunk of plaster that is hard, resting on the sill.

I've thought about trying to find a foam insulation machine that will fill the cavities.
I've also thought about buying a few crates of "Great Stuff" insulation and just going to town with it. I would do this in a gradual process maybe filling a foot at a time if its from cans, I know it expands a lot.

Also considered pour-in or blow-in especially with how dry it is between the walls (from what I can tell). I've heard both settl and leaves air gaps.

I've also considered just re-sealing the space with solid foam and a layer of canned spray foam.

Just looking for suggestions, ideally I wouldn't have to rent a machine or something to do spray, but if its the right way to do it I'll consider it.


Last edited by _h9; 04-19-2013 at 11:03 AM.
_h9 is offline   Reply With Quote
Old 04-19-2013, 11:29 AM   #2
Member
 
Join Date: Oct 2012
Location: new mexico
Posts: 344
Default

Insulating old walls top down


gut the walls and do it right.

redman88 is offline   Reply With Quote
Old 04-19-2013, 11:47 AM   #3
_h9
Newbie
 
Join Date: Apr 2013
Posts: 4
Default

Insulating old walls top down


Quote:
Originally Posted by redman88 View Post
gut the walls and do it right.
I guess thats more work than I want to do. In that case I will just reseal the air spaces with rigid foam

Last edited by _h9; 04-19-2013 at 11:50 AM.
_h9 is offline   Reply With Quote
Old 04-19-2013, 11:57 AM   #4
Member
 
Join Date: Mar 2012
Location: Lynnwood, WA
Posts: 725
Default

Insulating old walls top down


If you decide to foam, make sure you use a low-expansion foam, so there's less chance of blowing out your walls. I wouldn't use GreatStuff or the likes. It's not meant to fill wall cavities and may not cure properly.

And, since you have plaster walls, do you know if you also have knob & tube wiring? Don't want to foam, if you do.

Here's a video showing DIY method of applying 2-part spray foam to a closed wall cavity.
Seattle2k is offline   Reply With Quote
Old 04-19-2013, 11:59 AM   #5
_h9
Newbie
 
Join Date: Apr 2013
Posts: 4
Default

Insulating old walls top down


If thats the black, double insulated stuff, that makes your hands filthy, then i've removed almost all of that and replaced it with romex. A lot of crawling on my belly in my crawlspace.

I'll look into the low-expansion stuff. Thanks for the suggestion!
_h9 is offline   Reply With Quote
Old 04-19-2013, 12:02 PM   #6
Member
 
Join Date: Mar 2012
Location: Lynnwood, WA
Posts: 725
Default

Insulating old walls top down


Just found this video.... Not sure if it was bad foam or some other proplem that caused it to shrink, but it's worth looking into further.

Uh oh, and here's another! http://www.youtube.com/watch?feature...s2AQT-2gs&NR=1 I think I would just use blown-in insulaton. Take note, though, that there may be different types of spray foam insulation.


UPDATE: According to literature on he NACHI website, I think those videos may be showing UFFI foam, rather than SPF foam. http://www.nachi.org/uffi-insulation-inspection.htm Yeah, probably UFFI foam in those videos: http://www.3news.co.nz/Foam-insulati...1/Default.aspx and http://www.branz.co.nz/cms_show_down...504c58456067a6

Last edited by Seattle2k; 04-19-2013 at 12:18 PM.
Seattle2k is offline   Reply With Quote
Old 04-19-2013, 01:58 PM   #7
_h9
Newbie
 
Join Date: Apr 2013
Posts: 4
Default

Insulating old walls top down


Thanks for the replies. I'm looking at a low-expansion kit by "Tiger Foam" for $600. Might just be the thing.

_h9 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Insulating basement walls bryanp22 Insulation 15 04-05-2013 10:24 PM
insulating brck form foundatrion walls ocdman Insulation 1 03-31-2013 10:00 AM
Insulating existing exterior walls....... DM3 Insulation 6 03-23-2013 11:11 PM
Insulating Superior Walls stradt03 Insulation 9 05-11-2011 06:09 PM
Framing & Insulating basment concrete walls harddy Building & Construction 8 12-02-2009 12:04 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.