Concrete block / Discussions

What is the best way to insulate a concrete block house?

...Concrete block walls are not as strong as poured concrete, since they are only held together by the mortar between blocks. Kent, did you ever come up with a pro...

Posted by kent wardecke Oct. 17, 2020, 11 a.m. Foundation and basement improvements 2 Responses

Can you insulate a concrete block basement walls with only rockwool?

...concrete block and we have 2 sides done with interior plastic membrane to french drain and sump pump, one side exterior waterproofing, and one side with no wate...

Posted by Aarne Valikangas Jan. 1, 2021, 9:22 p.m. Basements improvements 1 Responses

What is your opinion on filling block foundations with concrete?

...block 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 r...

Posted by Nina Hartt March 21, 2019, 8:06 a.m. Foundation and basement improvements 1 Responses

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) ...

Posted by Ken Gee July 31, 2019, 3:25 p.m. Basements improvements 4 Responses

Is sealing basement concrete floor against radon a good idea?

...concrete floor and walls. I have heard of a product called radon block, I believe this is a sealer of some kind. Just wondering if sealing my floor is worth...

Posted by Tim Hanrahan Sept. 18, 2020, 3:11 a.m. Radon in Homes - Mitigation 3 Responses

Should I install a poly moisture barrier before the rigid foam board against a basement wall?

...concrete block) at +/- 10% slope. Inside, I want to the best job I can, (without breaking up the concrete floor in the basement for an interior drainage syste...

Posted by DONandCATHY Crenna Dec. 14, 2020, 2:21 p.m. Basements improvements 3 Responses

I have many issues with my house where should I start?

...concrete basement and concrete block foundation addition. The basement is not insulated, the roof has very little insulation with vermiculite ( been tested ok) ...

Posted by Bryan Squirrell Sept. 29, 2019, 3:08 p.m. Wall assemblies - renovation 1 Responses

How do you insulate a crawlspace with dirt floor?

...block foundation that slide open with a little screen. We have rigid foam panels on the concrete block walls (2 inch) The cottage is 900 square ft. To complicat...

Posted by sal Bellicoso Oct. 30, 2019, 4:56 p.m. Crawl spaces 2 Responses

What is the best way to do exterior foundation styrofoam finishing?

I have never done exterior foundation insulating because I have never seen a good looking and long lasting finish. Even parging on concrete only lasts so long ...

Posted by Castor River Farm Jan. 31, 2021, 12:56 p.m. New foundations and slab-on-grade 1 Responses

Can you Insulate a cinder block basement foundation with Rockwool?

...concrete block foundation, with a channel at the bottom for drainage, either a surface drain in the concrete, or we would remove the concrete from the floor alo...

Posted by Victor B June 19, 2019, 11:41 p.m. Basements improvements 5 Responses

How do you apply vapor barrier and insulation to a CMU house?

...block for seismic resistance and attach the studs to the block. The block walls will basically become a veneer. Can I apply a paint vapor barrier, and which sid...

Posted by Scott Brekke Nov. 22, 2019, 9:37 a.m. Basements improvements 2 Responses

What is the best practice to insulate a crawl space floor?

...concrete block foundations are not as strong as poured concrete, so in very cold climates they are more susceptible to cracking if left to freeze and thaw. H...

Posted by austin Fanning March 16, 2020, 8:55 a.m. Crawl spaces 4 Responses

Why does interior insulation cause a freeze/thaw cycle- cinder block foundation?

...block foundations (or CMUs - concrete masonry units) are more at risk of cracking when insulated on the interior because they no longer have the interior heat t...

Posted by P Mci July 5, 2021, 11:17 p.m. Foundation and basement improvements 1 Responses

Should I vent the space between a block wall and vapor barrier?

...blocks to lift the bottom plate off the concrete. It is less than ideal, but better to have that moisture drain out below the wall onto the concrete floor where...

Posted by Nick Santore Oct. 10, 2020, 2:03 a.m. Basements improvements 1 Responses

What is the best way to insulate a Multi-material wall?

...concrete block visible on the outside. The outside of the house is brick to poured concrete. The inside of my cold room, with the three materials (concrete, c...

Posted by Steve J Sept. 29, 2020, 10:15 a.m. Wall assemblies - renovation 7 Responses

Should I bother testing for radon in a gutted and uninsulated house?

...block on top of roughly poured concrete. It has a dirt floor. It will not be used as living space. I will have to check to see if the 20mil radon block membra...

Posted by Luba Sharapan March 27, 2021, 12:04 p.m. Radon in Homes - Mitigation 3 Responses

Do I need to spray foam the ceiling of my crawl space to help winterize it?

...concrete blocks and a concrete floor. I cannot put a gas furnace in it as it doesn't meet the code---only 30" deep. If I have the spray foam done should that in...

Posted by Sheilagh Thompson Jan. 21, 2021, 1:48 p.m. Crawl spaces 1 Responses

How do you fix moisture problems in basement?

...concrete blocks and sit it up on small 1 inch high foam blocks (one cheap sheet of EPS from a local building supply store would be all you likely need) so the s...

Posted by John rodrigues Nov. 27, 2020, 8:50 a.m. Basements improvements 3 Responses