Crawl space insulation / Discussions

How do I solve below grade moisture problems in crawl spaces? Everyone has different ideas

...crawl space with a dirt floor. What would you recommend to help keep the moisture out, I notice you didn't like Vapor Barr on the concrete, however wondering if that's just on above grade basement walls. I'm in a high water table as well so it's a great big mess. I'm on my own trying to deal with this mess. I have comm...

Posted by Angie Keats May 17, 2025 Waterproofing and drainage

Can you insulate a cinder block basement/crawl space from the interior?

...crawl space repairs as it may help - How to insulate a crawl space properly If you are getting conflicting advice, I would think the person counselling you that you shouldn't do it is more cautious and well-informed if I had to take a guess, as apposed to someone who may be just saying "sure it's fine", because they wa...

Posted by P Mci April 14, 2025 Crawl spaces 1 response

What is the best way to combine insulation on the inside and outside of my crawl space?

...insulation is below a deck and the deck has around 3" of breathing space above 5" of gravel. The siding is above the deck. (1) What would be the benefit to add insulation as well to the interior of the crawl space. I am keen to have better air in the house and to conserve energy. The crawl space has a radon assembly in...

Posted by Maury Miloff Nov. 6, 2024 Crawl spaces 1 response

Why insulate the walls rather than the floor joists in a crawlspace?

...crawl space, which is a big oversight. First, here is our page about crawlspace insulation, that may answer your questions- The best way to insulate a crawlspace When you’ve seen crawlspaces with walls insulated and not the floor above, that will keep the crawlspace warmer. When there is insulation between the joists, ...

Posted by Ron Monk June 2, 2021 Crawl spaces 3 responses

Which insulation should I use under my cottage?

...crawlspace – walls and floors We can help you formulate a plan to improve it, we just need to know the above questions first is all. The best move you could do though, is the 6-mil poly on the floor you mentioned. That will keep the moisture in the ground and help you avoid mold and be much more comfortable by keeping ...

Posted by denis maurier May 3, 2021 Crawl spaces 3 responses

Can you create a passive wine cellar by insulating and air sealing a crawl space?

...spaces. First, you’d need to insulate the crawlspace, and there are a few things you have mentioned that would concern me. this page is a good starting place as it covers what to do about an uninsulated crawl space- How to insulate crawl spaces and prevent moisture damage Are your wood studs directly against the concre...

Posted by JC Wong April 2, 2021 Crawl spaces 5 responses

What's the best way to seal a crawl space and insulate?

...crawl space and insulate? Currently it is a vented space. Should the vents be closed permanently? The floor joists have batt insulation in them now. I have a vapor barrier with stone underneath and the radon pipe runs through the space as wel and out through my roof. I was thinking about putting foam board on the block...

Posted by Steven Johnston Feb. 23, 2021 Crawl spaces 1 response

What is the best method of repairing joists in a low crawl space?

...crawlspace and window wells.  Problem:  How do you replace/repair supporting wood when the space is only max. of 22" and shallow end down to 14"?  Hardwood floors above.  We don't want to break through from above.  Any alternatives? There is a lot we don’t like about crawl spaces, replacing joists in one without much h...

Posted by deb bino Sept. 1, 2021 Crawl spaces 3 responses

How do I condition my crawl space with a dirt floor?

...crawl with a part basement attached. 650 square feet. It has sand floor and below grade concrete walls. the access to the crawl is from the part basement. i have take out old r10 batts that were in the floor joists. the crawl is vented with 2 vents. i live on the east coast of Vancouver Island BC. I am have trouble dec...

Posted by Ryan Reichelt Nov. 27, 2020 Crawl spaces