Quantitative driving rain exposure on a vertical wall at various Canadian cities

The quantitative driving rain exposure for 15 important Canadian cities is derived by making use of the climatological data recorded at local meteorological stations. The driving rain parameters, namely, precipitation, intensity, impact frequency and impact duration, provide both long term and short term characteristics of local driving rain exposure on a vertical surface. These driving rain parameters are useful to designers in designing tight building envelopes against rain penetration. A realistic driving rain exposure test environment can be simulated by making use of these quantitative results for evaluating the performance of the building envelope.