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2. Surface tension
To solve this problem it is necessary to:
1. Install and maintain
drip edges
and
flashings
to break the momentum of the
water and prevent it from clinging to the
underside of the horizontal surfaces and
continuing into the building.
2. Provide and maintain sound mortar
joints.
The most common mistakes in restoration are:
•
Not repointing joints where necessary.
•
Filling or omitting new drip edges when
repairing or installing components.
•
Not replacing non-performing flashings or not
installing new ones where required.
Above: window header and sill without drip
edge
Below: window header and sill with drip edge