b'EXTREME WEATHERFigure 1: Typical hot and cold weather shocks.as a hot summer day followed by sudden rain and a drop in temperature, or a cold winter day followed by a sudden increase in temperature (see Figure 1). These shocks can cause deterioration of exposed roofing and other building envelopematerials.Theircontinued occurrenceinanincreasedandaccel-erated manner leads to property reduc-tion and rapid deterioration of compo-nents and systems. Establishing weather shock parameters is extremely important A WEATHER SHOCKSbecauseitallowsustomimicexperi-mental test protocols and examine their impactsonexposedcomponentsand any subsequent effects on the systems.PROTOCOLTheeffectsofweathershockand thermalstresseswillbedifferentfor various materials and parts of the roofing systems.Thecomponentsthatare exposed to weather elements will behave differentlythanothercomponents inside the roof assembly. The thermal expansionandcontraction at different rates and the subsequent stresses placed on materials can lead to breakage and cracksduetothetensionformedin thematerials.Undersuchconditions, the roof membrane can be popped at theseamsortheattachmentfasteners can protrude. Damages are more prone near roof penetrations, where materials withverydifferentcompositionscanbefound.Whiletheissueofstresses created within roofing components due to the change in temperature is one that has been previously studied, with climate change, temperatures and their fluctua-tionsareexpectedtobegreaterand more frequent. Therefore, developing a framework of how to determine weather www.rcabc.orgl17'