Indoor Environmental Systems (IES) sealed off our crawlspace and cleaned and painted our ductwork. I got 3 quotes from various companies that perform crawlspace encapsulation. IES was in the middle quoting around $10,000 plus they were the only one to offer a lifetime warranty. Their plan on my 1970’s house was to remove all the old insulation, scrub down all the wood to remove mold, spray the wood to prevent future mold growth, wipe down all the duct work and patch any holes, seal all the walls, put up insulation board on the walls, put down a thick, reflective floor cover, and several other items. This would make the crawlspace essentially like another room. The crew was very polite and professional. They arrived on time and worked diligently. After the first day’s work, there was one item that was missed, so when they returned the following day I relayed that info to them and they apologized for missing it and had no problem doing some rework to fix the issue. We also had them clean and apply a mold preventative paint to all of our ductwork for an additional cost. It has been almost a year since the work was done. We’ve had a very wet summer and I haven’t seen any moisture in the crawlspace at all. I had bought 5 temp/humidity sensors to place around the house and crawlspace. During the damp summer, the crawlspace is usually about 5 degrees cooler than the house with a 5% higher humidity than the house. I am very pleased with the results and would recommend IES to others looking to do similar work.