Dictionary of Moisture Protection & Restoration

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

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