American Clay highly recommends that you use artisans/applicators who have documented experience applying our products. We suggest that you ask for references and a portfolio of projects for your inspection. We have found that individuals who have taken the time to attend American Clay trainings and who have installed several projects provide the best results to you—our customer. We also suggest that you require a sample of the finish and color from your applicator/artisan. By approving these samples you can assure their understanding of how you want your walls and ceilings to appear.American Clay warrants the quality of our products. We do not warranty the installation. Please call your dealer for a list of applicators, or see our growing list under Find An Applicator.