My mom's house is on crawl and she has dirt foor w/ block foundation. Had termite inspec.& he measured moisture under to be high. ground is partially covered w/ a plastic vapor barrier (old) and he said we need to redo it. He said to lay plastic leaving 1ft parimeter around foundation and do not put plastic under main heating duct line. Is this correct? We live in southeast with high humidity in spring, summer and fall. He also said to get some stakes (forgot name of them) that you bend into U and poke through plastic to keep plastic down.
I've also heard you should put plastic vapor barrier up walls of foundation and to completely cover the ground under crawl.
What are some good step by step instructions including what to do if there is standing water.