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Insulating Basement Walls

DawgPaw

Well-known member
Joined
Mar 8, 2014
Messages
313
Location
USA
I’m working on my basement shop. Is there a good site on how to insulate the concrete walls? I see a lot of strong opinions. Is there a best practice?
 
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kj_mustang

Well-known member
Joined
Feb 9, 2011
Messages
1,212
Location
Harrisonburg, VA
Big factor to consider is how well the exterior wall is waterproofed. That would dictate, what I would do first on the interior wall.
 

66Caprice

Well-known member
Joined
Nov 15, 2009
Messages
899
Location
Stanwood, Washington
There are some very good video's on youtube by one of the universities. I believe it was the university of Minnisota that did a very good breakdown of how and why to insulate for proper ventilation. I can't do a search right now because I am at work.

Also the Dricore compant has some video's on their site as well as a whole basement wall system that you just install. It's pretty slick.
 
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TurnipTruck

Well-known member
Joined
Aug 28, 2005
Messages
1,550
Location
Southcentral Alaska
I used 1-1/2” sheet foam floor-to-joists, then built a 2x4 wall inboard of that with R13 Fiberglas and drywall. NO VAPOR BARRIER UNDERGROUND.
 

Nitrousbird

Member
Joined
Mar 15, 2021
Messages
9
Location
Powell, OH
I finished part of my basement (completed in early '19). I contracted out two items - drywall (I **** and got a killer deal) and spray foam insulation, as it was cheaper for a pro to do it than DIY by me.

IMO, closed foam insulation is the way to go. You can just do all your studs, electric, low voltage wiring, etc. without dealing with any insulation. When you are ready, get it foamed (closed cell for basements).

Spray foam is a great insulator but is also mold and moisture resistant.
 

foodie

Well-known member
Joined
Mar 16, 2018
Messages
1,342
Location
Michigan
Because I live in Michigan, and I have a concrete wall, I used 2 inch XPS glued to the wall with PL Foam board adhesive. But 1st I had corrected by a basement waterproofing company any rod holes that looked suspicious that might leak. Then I had a contractor use metal studs. I filled that cavity with Roxul then had him drywall over that. The drywall was kept 1/2 inch off of the floor. I had him install a plastic J channel under the drywall so no moisture if any would wick to the drywall. (I hope not at least). I had asbestos tile on my floor and rather than pay the insane amount of money to have it removed (it was in great condition) I had porcelain tile placed over the top of it.
I purchased cabinets from Lily Ann cabinets they are RTA but incredibly strong, actually better than the ones in my kitchen! I also had a granite countertop put in. This overall was not a project I had planned to do, it was because of water leakage and mold in my basement.
Prior to all of this I researched on Green Building Advisor website as well as Matt Risenger websites and videos. My basement is as dry as a bone and this winter it was warmer than the rest of my house. I love it! Good luck with your project. This was one of the best investments I made besides having my garage floor porcelain tiled.
 

nadogail

Well-known member
Joined
Jan 23, 2009
Messages
31,904
Location
Coronado, CA
As you can see by the other posts, there are lots of ways. There are also lots of opinions, just like horse races.
 

shaune

Well-known member
Joined
Dec 5, 2006
Messages
186
Location
La Ronge Sask
Make sure there NO water issues or you will hate your basement. Weeping tile, downspouts, rubber membrane...what ever but NO water ! Then build what ever your codes say for inside.
 
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