Bsement Blanket Wall Insulation?? - Insulation - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 11-07-2012, 12:33 PM   #1
Member
 
Join Date: Jan 2008
Posts: 38
Rewards Points: 25
Default

Bsement blanket wall insulation??



I have a 1500 sq feet unfinished walkout basement. 1/3 of the walls is framed and lined with R-11 fiberglass batts with no drywall covering the batts..The rest of the walls are the concrete foundation.
We do not utilize the basement for anything but storage. But in the winter, it is significantly colder down there than upstairs and the furnace ductwork stays cold so that it seems to have an effect on the heat that the furnace puts out upstairs.
Would adding blanket wall insulation all around the basement help significantly so that the expense of adding it would be offset by the energy savings?
Any and all opinions would be welcome. Thanks.

Advertisement

billyg is offline   Reply With Quote
Old 11-07-2012, 11:59 PM   #2
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 1,000
Default

Bsement blanket wall insulation??


Bag the blanket insulation. Search here and/or buildingscience.com. You should use rigid foam, taping/sealing edges, or closed cell spray foam. No vapor barrier, esp below grade, and no batt insulation. Is it economical? Probably so; it depends on your heat loss, of course; you or someone else will have to run the numbers on that.

Advertisement

jklingel is offline   Reply With Quote
Old 11-08-2012, 08:46 AM   #3
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,400
Rewards Points: 2,462
Default

Bsement blanket wall insulation??


What temp is the thermostat set at? Also, have you sealed all air leaks around windows, doors, outlet boxes, and insulation in the attic space? The basement insulation would not have an affect on the main living area.

My basement only has R-13 batts around the Sill & Rim joist areas, none on the walls, and during winter, it will get around and stay at about 58, but the upstairs is 68 with no cold feeling.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 11-08-2012, 09:25 AM   #4
Member
 
Join Date: Mar 2011
Location: As always..beside myself.
Posts: 4,226
Rewards Points: 2,000
Default

Bsement blanket wall insulation??


For your comfort and added energy savings my opinion is to insulate the walls. Seal everything Greg mentioned as well as the exterior window trim.

My basement temp is the same or even a degree or two warmer than the upstairs. Its significantly cooler in the summer. Thats with no a/c running just the furnace fan circulating from May to Sept.

Read this:

http://www.cmhc-schl.gc.ca/en/co/mah...efcosa_002.cfm
creeper is offline   Reply With Quote
Old 11-08-2012, 12:21 PM   #5
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 1,000
Default

Bsement blanket wall insulation??


One addendum to what was mentioned above: "The basement insulation would not have an affect on the main living area." True, as long as the heat source can keep up with the heat loss to the basement. However, you are dumping btu's to the basement as long as it is cooler than upstairs. Insulate the walls and you may even find that your upstairs floor is warmer.
jklingel is offline   Reply With Quote
Old 11-08-2012, 12:58 PM   #6
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,400
Rewards Points: 2,462
Default

Bsement blanket wall insulation??


jklingel, actually I find that it does not affect my upstairs, with just two vents for downstairs, and a return. The OP problem is most likely going to be found upstairs, but without knowing where they live, for all we know is that they may reside in the Artic Circle, which yes, insulating the downstairs helps.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 11-08-2012, 02:32 PM   #7
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 1,000
Default

Bsement blanket wall insulation??


My point is this: Regardless of location, if the basement is cooler than the upstairs, as the OP mentioned, then heat is going to it from upstairs. P, EOS. If the heat source outpaces the losses, then, no, you won't "feel" the losses, but they are there nonetheless. After all, we don't necessarily "feel" the heat losses out of our house in ANY direction, assuming we can keep the temp "comfortable". Again, is the ROI such that investing in insulation is economical? Dunno. As I said earlier, that depends on the amount of heat loss, cost of fuel and foam, labor (if it is the traditional DIY 60-minutes/hr, labor is cheap), etc.
jklingel is offline   Reply With Quote
Old 11-08-2012, 03:57 PM   #8
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,400
Rewards Points: 2,462
Default

Bsement blanket wall insulation??


Actually it won't. Convection currents will keep th upstairs warm, and as long as there are vents opn in the basement, the basement area would stay reasonable.

If they did insulate the basement, thwre is more to it than just slapping a few blankets of insulation on the walls.

I would suggest to the OP to place some type of remotw thermostat down there, so that you an read the temps from upstairs, and compare to those in the main living area

Even if the furnace is running like it should and cycling normal as it should, the basement will have no affect on thw main floor.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 11-08-2012, 05:40 PM   #9
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 1,000
Default

Bsement blanket wall insulation??


"... the basement will have no affect on thw main floor." One last time.... I don't know if we are maybe looking at this from different angles. Maybe you are talking about "perceived effect"? The colder basement has an effect on the warmer upstairs, perceived or not. If the basement is colder, it is taking heat from the house, just like the colder outside air is doing(when it is colder outside. When it is warmer, the reverse holds true.) That is not debatable; it is physics: Heat goes to cold (in our jargon. Entropy and all that for the physics folks.) If you want to save energy, stop air movement and insulate. If you heat the basement to the same temp as the upstairs, only then will the basement have "no effect" on the upstairs. It is the "heat the basement" part; that takes fuel. How much insulation depends on.... see above.
jklingel is offline   Reply With Quote
Old 11-08-2012, 06:48 PM   #10
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,400
Rewards Points: 2,462
Default

Bsement blanket wall insulation??


It has never had an affect on our main living area. Our furnace cycles 2 times a hour, and stays at a stable temp. It would be different if I did not go around and air seal around windows, outlets, insulate the rim & sill joists. Yes, everyones homes are different along with the hvac systems, but not placing insulation on the concrete walls, with most basements at least 8 feet underground, or like mine, at least 6 feet under ground.

Now if the OP is way up north, and has at least one side open to the air, yes it will make a difference if they do not have ground or even XPS along that wall.
__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 11-08-2012, 08:40 PM   #11
Registered User
 
Join Date: Mar 2009
Posts: 9,983
Rewards Points: 2,032
Default

Bsement blanket wall insulation??


Down to the frost line for your area would help: http://www.quadlock.com/technical_li...Insulation.pdf

Scientific results, pp. 69: http://www.buildingscience.com/docum...study-analysis

Gary

Advertisement

__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Reply


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
Insulating your attic Bob Mariani How To Guides 5 07-07-2013 09:49 PM
Where to apply vapor barrier(s) for wall insulation patented Insulation 6 10-30-2012 12:17 AM
Exterior wall insulation iowa climate strategery Insulation 1 02-16-2012 03:34 PM
attic insulation / knee wall oscarMadison Building & Construction 2 01-19-2010 09:37 PM
Marrying a sloping stone wall to a cinder block wall. mrdol Landscaping & Lawn Care 1 11-09-2007 05:08 PM




Top of Page | View New Posts