FLASHING
PRIMER
Details for leak-free flashing with
slate, wood, asphalt, and clay
by Les Gove
The copper valleys and other
flashings, installed when the
slate roof was completed
in 1899, began to develop
pinhole leaks around 1975,
and was replaced 10 years
later by the author of
this article.
flashing principles and techniques that
The primary purpose of any roof is to
protect the interior of a building from
rain and snow. In addition, the roof
should add to the character of the building.
A proper flashing job is essential for
both. In fact, how long a roof will serve
you maintenance-free depends largely
on the durability of the flashing materials,
and how they are applied.
In this article, we'll discuss basic
apply to