Water sitting on crawl space vapor barrier

[Darren Spencer]

[Larry D. Kage]

Originally Posted by dspencer1

It allows vegetation growth.

I haven't experienced that in our dark spaces. We're mostly sand around here, too, so not any moisture to speak of.

[rdimmerling]

That looks more like a pool liner, not a vapor barrier.........

[Frank P. Newman]

The only reason I can think of for using black is because the clear stuff deteriorates in UV light - but in a crawl space??

As for water, I tell clients that there is never an acceptable amount of water in a crawl space. It should be dry - period. In the humid south, water can frequently be found on the vapor barrier below HVAC ducts in the summer (cooling season) due to leaking ducts. Cold air + moist air= condensation. It is a great way to identify leaking ducts.