Whats more common: product failures or installation failures?
The manufacturing process generally assures consistency of product. Therefore, products typically will not fail if they’ve been installed in accordance with manufacturer specification. Installation, however, is subject to human inconsistency on a day-by-day, moment-by-moment, basis. Making sure you work with only highly qualified and experienced professional contractors is the best way to assure products will be installed as designed, thereby minimizing any problems.