Forgive if this is the wrong forum, didn't really see one that matched. Please move if needed. I am starting to have standing water in my crawl space. When looking to get estimates for repair, some companies state they will install a plastic barrier and then concrete. Some say they will only use barrier and that no concrete is needed. Which is the better way to go? Pros and cons? I plan to be in the house for a long time, so obviously want the problem fixed, but don't want to pay for something that might not be needed. TIA!