Insulating basements / Discussions

What is the best way to insulate a basement concrete floor?

...Insulating a slab from above in a cold climate like Winnipeg is a smart move to improve comfort. Since it was built in 2008 it likely has some insulation, but not a lot, so adding 4 inches of insulation will significantly reduce heat loss and keep the floor and your feet warm. There is nothing wrong with EPS foam, you ...

Posted by dean c May 1, 2026 Basements improvements 1 response

Can I use a dimpled membrane and Isorad panels for basement wall insulation?

...basements - Why encapsulation is the best method for basement and foundation upgrades A more reliable approach is to install the dimpled membrane against the wall, followed by a continuous layer of rigid 2-inch XPS foam boards with sealed joints. You can then build an  interior framed wall that is safely protected from...

Posted by David Perreault May 1, 2026 Basements improvements 1 response

What type of green flooring is best for a basement floor?

We just had a rare flash flood which raised the water table and forced water into our basement between the floor and wall. It was a finished basement with carpeting. We don't plan to put carpeting back in but would like something nice looking that would not have to be removed if this ever happened again. It previously ...

Posted by Jeff Krohn Sept. 15, 2019 Basements improvements 1 response

What insulation should I put on basement block walls that is resistant to mold?

Concrete block basement wall. Moisture issue in spring ( and I suspect fall). We get a lot of people asking about the best way to insulate a cinder block (CMU) foundation wall, I would say the first place to go is this discussion here which I think already answers all your questions -   How to insulate a cinder block f...

Posted by Ken Gee July 31, 2019 Basements improvements 4 responses

How do you remove moisture and condensation from basement walls?

...Basements Moldy? How to Fix & Prevent Mold in Homes A dehumidifier is a good thing to have in a basement but it won’t do much to remove moisture from the other side of a vapor barrier. Judging by how the builders designed the interior and the fact that it is still wet 15 years later, I would be surprised if they in...

Posted by Aaron Keating July 27, 2019 Basements improvements 3 responses

What do I in my basement where new insulation meets old?

...basements, and for a few more tips you could check out this page -  How to Insulate Basements Properly And to address your question specifically, in a perfect world yes, you would do it all and continuously. If you are simply not going to insulate your laundry room, you are still better to do the rest of it than not at...

Posted by Steve J July 20, 2019 Basements improvements 2 responses

What is the best way to insulate rim joists with EPS and batts?

I'm trying to insulate Rim joists /cripple walls in basements have read about three methods using EPS & batt with slightly different orders. Plan to insulate concrete walls with 2" of EPS, with 2x4 framing (filled with rockwool batt), and then drywall. Which one of these approaches should I use?  1) Sandwich multip...

Posted by Steve J July 18, 2019 Basements improvements 3 responses

How should I insulate basement Walls in climate zone 5?

I live in climate zone 5 in USA and plan to frame basement walls roughly 3” away from concrete and then place mineral wool between the studs.  I do not plan to apply any vapor barrier to the concrete or between the studs and drywall and the mineral wool has no vapor barrier.  Is this space between concrete and studwall...

Posted by Chad Johnson March 25, 2019 Basements improvements 1 response

Should I insulate my basement ceiling?

...insulating it. Many basements in older homes simply are not insulated at all, and therefore they do have higher heating bills to show for it (which is not great long term), but for one winter I wouldn’t think twice about leaving it uninsulated. The basement may not be suitable for refinishing, but it will for sure be s...

Posted by Nina Hartt March 21, 2019 Basements improvements 1 response

What is your opinion on filling block foundations with concrete?

Our house is a little over 100 years old, with a cinderblock foundation walls in the basement.  We’ve got a minor crack in the grout, and we were advised to fill the block with concrete for strength, in addition to repairing the grout.   Thanks in advance  Hi Nina,  That's a structural question that we would be unable ...

Posted by Nina Hartt March 21, 2019 Foundation and basement improvements 1 response

Basement reno - How do I effectively insulate my basement?

...basements properly in new homes -  Best practices for building basements in new homes Now that we got that stuff out of the way.... here are some more direct answers to your questions. There are a lot of questions in there so I've copied them here below so neither of us get lost :  Question: Concrete Foundation: Durof...

Posted by Steve J Feb. 13, 2019 Foundation and basement improvements 2 responses

Is polyiso board or styrofoam best for insulating when finishing a basement in CO?

...basements walls the same way they build above grade walls, without realizing that they can’t dry to the outside.  So putting organic materials like wood against a wet concrete wall, (yes, your concrete wall is probably wet even if you think its dry) followed by batt insulation and a sheet of plastic should surprise no ...

Posted by Evan B. Nov. 21, 2019 Basements improvements 1 response

What is the best way to renovate a basement after a flood?

Hello, I'm in the midst of a post-flood basement renovation and have been doing some reading on your website only recently. I'm realizing that I may have made some mistakes and would like your advice as to what direction to take in order to minimize future problems. The basement was partially finished when it flooded a...

Posted by Wren Toombs June 18, 2018 Foundation and basement improvements 2 responses

Why is a my basement smelly and humid and how do i fix it?

...insulating your basement. According to the Canada Mortgage and Housing Corporation (CMHC), this part of the home is typically responsible for more than 30% of heat loss. Here is a page that can help, all about how to build a basement properly -  Why basements are moldy and how to fix it  It sounds like you do have prob...

Posted by Jeff O. Feb. 8, 2017 Foundation and basement improvements 3 responses