Penetration Details

This flashing method is considered the most satisfactory method of preventing leaks except in areas exposed to earthquakes. Through-wall flashing is used at all points where moisture may enter the wall, and in selected places particularly susceptible to water damage. The flashing must typically rise at least 8" from the low point at the exterior face of the building to the high point inside the wall. Weeps spaced a maximum of 24" O. Use of pea gravel is recommended behind brick veneer.