I had quite a job for them. We moved into a house built in 1978, just a little over a year ago. Upon inspection from NTX Foam, I discovered their were areas of the house that didn't contain any insulation. On top of that, the insulation was old, compacted, full of dust, contained animal droppings, and mostly ineffective. NTX came with a giant vacuum cleaner, and cleaned it all out! Immediately after they sprayed the foam, we could tell a big difference in the comfort of our home. The crew was highly professional, and took extra care to protect our home and belonging during the process. We love how the fan made our home feel, and we look forward to seeing the savings. Early estimates look like 30-40%!