WSRCA does not recommend this detail for heavy rain and/or snow and ice climates.

The profile of specific components, their configuration or sequencing, can vary with the roof system, climatic differences, and regional or area practices. Dimensions as shown are recommended minimums and are intended to be approximate to allow for reasonable tolerances due to field conditions.

For sunny, hot-, and/or high-altitude projects located in winter-time heating climates, WSRCA suggests that thermoplastic single-ply roof membranes and flashing ply(s) be white, or another light color, to provide a reflective surface minimizing heat gain and thermal aging.