Rigid Insulation In Basement - Carpentry - DIY Chatroom Home Improvement Forum

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


Thread Tools
Display Modes
Old 01-21-2011, 10:19 AM   #1
Join Date: Jan 2011
Location: Toronto, Canada
Posts: 1
Rewards Points: 10

rigid insulation in basement

Hi. I rent a +50 year old home with cinder block exposed foundation in my basement. I want to insulate my laundry room 'cause it's really cold down there right now, and the bathroom above is cold as well. I don't have much space, everything is right up against the walls with only a narrow space to be able to open the dryer door. What's the minimum thickness of rigid foam I could use, and not make it a complete waste of $ investment? Also can I leave the rigid foam just exposed after? I'm not interested in fully finishing the laundry room, so don't want to put the $ into a stud wall, and lose the precious inches.
belindapotter is offline   Reply With Quote
Sponsored Links
Old 01-21-2011, 10:45 AM   #2
ccarlisle's Avatar
Join Date: Jul 2008
Location: Montreal, Quebec, Canada
Posts: 1,889
Rewards Points: 1,000

I'd be looking at extruded polystyrene - the blue stuff - that comes in 2'x8' sheets. Not the white stuff, that's not as efficient an insulator for the $$. Thickness will depend on what you fit in, but in Toronto, I'd be looking at 1.5" thick...those are about $18 each, I think. Look at gluing them to the walls with appropriate glue and tape the joints; look into doing the same for the space above your joists.

The codes say they should be covered with drywall, but what you do is of course your own responsibility.
“The average American woman is about 25 pounds heavier than she was in 1960...Recognizing obesity as a disease will help change the way the medical community tackles this complex issue that affects approximately 1 in 3 Americans,”
ccarlisle is offline   Reply With Quote
The Following User Says Thank You to ccarlisle For This Useful Post:
belindapotter (01-21-2011)
Sponsored Links
Old 01-22-2011, 12:36 AM   #3
Registered User
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526

The foam board should be taped and sealed so no interior air can get to the concrete block to condense there, Fig. 17; http://www.rlmartin.com/buildingscie.../enclosure.htm
Laundry rooms are moisture producing rooms.

Don’t forget the rim joists, as CC said; http://www.rd.com/57548/article57548.html

I would be concerned leaving foam board exposed next to the washer/dryer, possible ignition sources. Especially a gas dryer, if so equipped. Check with your landlord on this and your Renter Insurance Policy, to be safe. Even if you used the blue foam below , covered with drywall and the upper wall covered with foil faced polyiso board (some B.D. let it be exposed, check with yours), fig. #12; http://www.buildingscience.com/docum...lation-systems

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
Sponsored Links
Old 01-22-2011, 01:01 AM   #4
Join Date: Apr 2008
Location: Rural northern NJ
Posts: 592
Rewards Points: 524

You can buy foam that's recessed for furring strips. I'm putting in two layers of 2" foam, but the first 2" layer really made a difference.

If you get really ambitious and you want to put down tile in this rental, look into Wedi board to provide a thermal break.

Check out this video from Owens Corning:
benjamincall is offline   Reply With Quote
Sponsored Links

basement , insulation

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
How To Install Rigid Foam Insulation on Concrete earthad1 Building & Construction 9 10-26-2010 10:49 AM
basement insulation - condensation behind the batt insulation natalie Building & Construction 3 01-31-2010 11:19 AM
Basement Insulation and humidity control mcwolfe6 General DIY Discussions 11 01-28-2010 07:02 PM
Basement Insulation raulakh Building & Construction 2 10-13-2009 01:36 AM
basement insulation and vapour barrier coolnes Remodeling 11 02-01-2009 09:56 AM

Top of Page | View New Posts