I had crawl space waterproofing performed under my home. It was a two day job. Timothy and his team of Jonathon, Jesse and Moi did a remarkable job and finished as advertised. This entails literally the removable of hundreds of pounds of deteriorated insulation (and other garbage left by the builder) and then encasing the whole area in plastic sheeting. A really dirty job in a VERY restricted work space. Yet, both nights at cessation of work, access from the outside of the home to the crawl space door was left without a hint of mud or residue from underneath the house. At the end of the project, Timothy explained the entire procedure and showed me photos. It looked like a skating rink - bright and white! At $14,000, the procedure is not cheap, but since our home was built on a subterranean spring, necessary. But after seeing all the effort by the workers and the amount of material drug in and out of that crawl space, I definitely got my money's worth. Kudos to Timothy and his team and I highly recommend TerraFirma.