Recommended Expansion Joint Spacing for Flashings

The table below is a general recommendation based on “typical” timber-framed structures. It is recommended that it as adhered to rigidly for ridges, hips, change-of-pitch flashings and head (transverse) barges. The need for expansion joints in aprons and barges is less critical and may be assessed by the installer.

Expansion joints in parapet caps are more critical than with most other flashings and will be subject to a later review.