Installation
What is Counter Flashing?
Roofing Glossary · Installation
Definition
Metal flashing embedded in the mortar joints or surface of a chimney or wall that overlaps the step flashing below it, forming a two-part waterproofing system at vertical-to-roof transitions. Counter flashing is typically cut from lead, copper, or galvanized steel and is inserted into a reglet (a saw-cut groove) in the masonry. It directs water over the step flashing and away from the joint.
Related Roofing Terms
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Step FlashingIndividual rectangular pieces of metal flashing installed in an alternating staircase pattern at the...
→FlashingThin strips of impervious metal — typically galvanized steel, aluminum, or lead — installed at joint...
→ChimneyA vertical masonry or metal structure projecting above the roofline that creates the draft for a fir...
More Installation Terms
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