"1. If it is wet enough that CC will not allow it to dry and OC soaks it up like a sponge, then the Crawl needs to be stripped back to dirt and the stem walls to concrete and a proper drainage system put in, the Class 1 Vapor Retarder replaced…"
"So following with that logic, your basement walls should also be OC? Sorry but you still have numerous ways for said area to dry out without soakiing everything else & it isn't going to rot just because it is "wet"
"I'm not a believer in vented crawl spaces but maybe in some climates there are reasons for them. I'm also not a fan of counting on natural (rather than mechanical) ventilation for accomplishing any goal you hope…"
Glad to hear that you are friends with the contractor and just trying to gain information. His installation is not "best practice" but it is an accepted installation method. As I mentioned in a previous post, best…"
"Debra, being a BPI certfied contractor, I agree but Jennifer didn't provide enough information for us to accurately assess the conditions so I stand by my 90% statement. By the way, code is for new construction. This is an…"
"Code is minimum and it appears that the vapor barrier didn't even reach the walls in areas as per the photos. 90% humidity is not going to really resolve all the issues for the homeowner who is having respiratory issues. While I…"
This contractor is a close friend of mine who I have referred a lot of work to & have provided resources for continuing education in home performance. There is no intention to "nail" anyone, but would like to work with…"
"I am not sure what the codes say in Cali but (unless I am overlooking it) there is no requirement in the 2009 IRC or IECC for "vented" crawls
For sealed crawls it is;
R408.3.1 Exposed earth is covered with a continuous Class I vapor…"
"Yes, the purpose of the barrier is to trap the moisture to keep it from getting into the conditioned space. That is why best practice tells us that we run the membrane up the foundation wall, terminate it approximately 6 inches below the mud…"
"You are certainly correct.
Keep in mind that the Contractor is probably trying to work within the codes for his particular area. The ICC and energy codes are being updated.
If you are going to keep a crawl space unconditoned and ventilated,…"
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