How do I get rid of moisture with cement floor crawl space that has a vapour barrier?
I recently replaced the vapour barrier because of dry rot. Luckily no cracks in the foundation and floor joists are fine but I noticed that barrier is extremely wet. Running a dehumidifier has helped alot but still have moisture. Is there anything else I could do to remedy problems?
Is your vapour barrier laying directly on the concrete floor? I’m just not sure of the positioning given that you mention joists as well, unless you’re just reporting on the general condition of the space. What are the humidity levels? Homes (basements, crawl spaces and the whole shh-bang) are best kept below 60% Relative Humidity to avoid mold and I’m wondering how high above that you are, if at all. I It’s not a problem if the vapour barrier is wet on one side, that just means it’s doing its job.
If you have a crawl space with a vapour barrier and a dehumidifier it should be pretty good, so if you actually have a humidity problem then I’d check to make sure your dehumidifier is working properly and is sized properly for the volume of air you are trying to condition.
Here is our page on How to Insulate Crawlspaces and Remove Moisture. Have a read over that and let us know if you still have questions let us know and give us a few more details, I’m sure we can help somehow.
Another thing worth looking into while you're at this stage would be to check if you have high levels of radon gas, here is our page on How to Remove Radon Gas from Basements and Crawlspaces