John, I'm stepping into the light so you can tell me how it is done or point me to a website. I'm acquainted with reverse osmosis water purification systems for drinking water but not this osmosis/capilary movement damp proofing action you are referring to. We always welcome your help from accross the atlantic.
The uripeeins are so far ahead of us americans on world affairs, construction methods such as radiant heat from hot water, etc. so it is nice to hear from a uropem. After all the urapains have built castles for thousands of years and have managed to retrofit plumbing during remodels. lol