Are they using a spray method or some other method for distributing the adhesive? Our contractor did not spray, as a result it was much easier for them to control where this goes. I would also request that they use a low Volatile Organic Compound, or VOC, adhesive, if one is available. I know these are harmful to us and collections. I believe even the carpet can emit VOCs but have not really researched this. At least if you request this of the adhesive, it minimizes the pollutants as a result of this project.