We provide On-site Field Water Penetration Testing of installed windows and doors during building envelope rehabilitation and new construction projects to verify performance of these assemblies. Testing provides quality assurance to the building owners’ with respect to the new window and door purchase. Testing can also be done during a building envelope condition assessment and failure investigation work to verify performance and identify source of failure(s) within the installed assemblies. Testing is typically performed to meet general conformance with ASTM E1105 Testing Procedure.