BET is a local NYC based Building Envelope testing lab specializing in on-site testing of windows, Curtainwall and Cladding systems. We do the "challenging ones". We perform most standard ASTM and AAMA test methods and procedures and SPECIALIZE in forensic investigation of facade systems. As an independent testing agency we can provide non-biased results in both construction QC testing and in support of litigation. Facades leak investigation window testing Curtainwalls.