moved into a home that has a crawlspace that sat for about a year in the humid east coast summer heat. then some into the fall. layed down the 20mil vapor barrier ..immediately the next day after 90-95% of the earth under was covered , not even done taping and still some small spots exposed.. the foundation had begun to dry. even parts of the house were joist had significant and visible moisture it quickly started to dry. Havent used my moisture meter on the sub flooring yet( which is visible due to putting down new hardwood) but according to my thermometer which has a RH reading. it went from anywhere from 55-70 % ( before vapor barrier) to right around 45-35 % ( after installation of vapor barrier) . The Vapor barrier feels and looks like true 20mil. I have yet to see a better product around. Highly recommend to anyone looking to encapsulate or just have some added protection from moisture in there crawlspace. !

great sturdy strong product, fast to delivery highly recomanded

This is an extremely heavy duty product. I got it to put on some particularly heavy traffic sections of my crawlspace floor; elsewhere (floor and walls) the 12-mil product is more than adequate. The only two to consider are the 12-mil and 20-mil DrySpace.

This product appears to be everything it says it is. Time will tell. Would recommend this material to anyone for this application.

I noticed an immediate difference in air quality when the job was done. The 20 mil plastic is thick but easy to use. I do not know about durability as I just installed it. But it does tape together very well.