Counter Flashing
Metal flashing embedded into masonry or a wall surface that covers the top edge of step flashing. Prevents water from getting behind the step flashing.
Metal flashing embedded into masonry or a wall surface that covers the top edge of step flashing. Prevents water from getting behind the step flashing.
Why Counter Flashing Matters for Insurance Claims
Counter flashing is the top layer of a two-part flashing system at masonry intersections. When counter flashing fails, water gets behind the step flashing and into the wall cavity, causing interior damage. Storm damage can dislodge counter flashing from mortar joints, and freeze-thaw cycles can crack the mortar seal that holds it in place. Inspecting counter flashing around chimneys and masonry walls is essential during any roof damage assessment.
Counter Flashing in Xactimate Estimates
Counter flashing appears as a separate line item from step flashing in Xactimate. It is measured in linear feet. If the counter flashing is embedded in a reglet (a groove cut into the masonry), the estimate may also include a line item for cutting and sealing the reglet. The mortar sealant used to secure counter flashing in the joint is another detail that should be accounted for, as failed sealant is a primary cause of counter flashing leaks.
Counter Flashing Materials and Methods
Counter flashing is typically made from aluminum, galvanized steel, or copper. The metal is bent to fit into a mortar joint or reglet and folded down over the step flashing below. On stucco or siding walls, counter flashing may be integrated with a kick-out diverter at the base. Proper counter flashing installation requires removing a mortar joint, inserting the flashing, and resealing with appropriate masonry caulk. This skilled labor should be reflected in the estimate.
Frequently asked questions
Counter flashing is required wherever step flashing meets a masonry surface like a chimney or brick wall. It is embedded into the mortar joint and folds down over the top of the step flashing to prevent water from running behind it.
Counter flashing is measured in linear feet and has its own selector code in Xactimate. It should be listed separately from step flashing. If the mortar joint needs to be cut and resealed (reglet work), that is an additional line item.
Sometimes counter flashing embedded in mortar can be left in place if it is in good condition and properly sealed. However, if the counter flashing is bent, corroded, or the mortar seal has failed, replacement is the better practice.
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