Block foundation / Discussions

What foundation is best for a cottage on an island?

...foundations and that a slab would be better. Also the neighbour built a similar chalet using pier foundations on the island and was asked by the municipality to fill in between the piers with concrete blocks, but I thought this might create problems with condensation. So my questions are : 1. What is the best way to in...

Posted by Ben Barr Aug. 11, 2025 Foundation choices 1 response

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

...foundation/walls are 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 waterproofing but also no moisture penetration issues. Our plan after consulting several sources was to frame with 2x4s painted with mold resis...

Posted by Aarne Valikangas Jan. 1, 2021 Basements improvements 1 response

How do you fix moisture problems in basement?

...block foundation would it be ok if I put Delta MS against the block foundation then apply the rigind insulation Thanks for your help. Putting a membrane like Delta MS against a foundation wall before studs is a great idea. Keep in mind though, that moisture may drain down the interior or the wall, so ideally you would ...

Posted by John rodrigues Nov. 27, 2020 Basements improvements 3 responses

Can you build foundations and slabs with field stones?

...foundation is not as strong as a poured concrete foundation, so while many of them exist, including entire homes made from them, I imagine you would have a very difficult time getting a permit to build one new. You could of course ‘physically’ do it and it works (evidenced by the fact that so many exist a century or mo...

Posted by Bryan Squirrell Jan. 3, 2022 Foundation and basement improvements 1 response

What is the best insulation for concrete block foundation wall and basement stud wall system?

...block wall foundation. I have a 1975 home with a block wall foundation. Both of us want to insuate the basement walls. She wants to spray foam the rin joists and  apply 2" of foam on the walls with the stud wall being installed 1" from the block wall. However I  am concerned that concrete block needs to breath, based o...

Posted by Don Fraser Dec. 8, 2021 Foundation and basement improvements 2 responses

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

...block wall would also be heating the ground. Being uninsulated doesn’t mean it won’t freeze at all as it probably feels frozen to the touch, but without interior insulation the majority of the block would not be frozen, it would only be the very exterior, if that, that would be below zero degrees. So for a block wall t...

Posted by P Mci July 5, 2021 Foundation and basement improvements 1 response

How do you improve an old block foundation with no insulation or exterior moisture barrier?

...block foundation which is 42" to 48" below grade; walls 30-32" above grade which slopes down and away from foundation/wall intersect.  Basement walls parged and painted with mold resistant paint; floor painted. Auto dehumidifier always on 24/7 year after year; fan oscillating at rear of basement; try to keep humidity a...

Posted by Wilhelmina Lange March 11, 2021 Foundation and basement improvements 2 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 repairing the grout.   Thanks in advance  Hi Nina,  That's a structural question that we would be unable to answer unfortately, since a crack in a block foundat...

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

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

...block walls, open lattice wall to access crawl space, exposed floor joists 24'' o.c., height from ground to bottom of joists is 36" If you have a three-sided foundation wall with lattice work on one side and a dirt floor, the whole underside of the house is exposed to the exterior temperatures. I think you first need...

Posted by austin Fanning March 16, 2020 Crawl spaces 4 responses

Should you put insulation on the outside of a cinder block wall in a desert?

...block home with a 2 foot over hang. I studed my inner wall, I put R13 fiberglass and sheet rock, then on the outside I tared the out side and filled most  of them with cement a few have insolation very few. Shoud I put styrofoam board then tar board chicken wire then stuco then paint with elastromeric/ sand mix, all to...

Posted by Michael Apodaca March 9, 2020 Wall assemblies - renovation 1 response