Flashing & Chimney Repairs in Wilmington, DE

Almost always it’s failed flashing or open mortar joints where the chimney passes through the roof — not the chimney structure itself. On older masonry homes the original step and counter-flashing corrodes, the mortar reglet that holds it opens up, and sealant dries and cracks after decades of freeze-thaw and nor’easter wind. Because the water then travels along the decking, the leak usually shows up as a ceiling stain several feet away and gets misdiagnosed as a shingle problem. We re-cut the mortar reglet, install proper step flashing, and seal the boots and joints at the source, so the leak actually stops instead of returning with the next storm. Call (302) 618-1471.

Much cheaper — it’s one of the highest-leverage roof repairs you can make. A flashing fix in the low hundreds of dollars, left alone, becomes rotted decking, ruined insulation, stained and crumbling drywall, and sometimes framing damage or mold that runs into the thousands. Because a chimney or flashing leak is slow and intermittent — it only shows in certain wind-driven rains — it’s easy to ignore until the interior damage forces the issue. Catching it early, at the first small ceiling stain, means a targeted repair instead of a tear-into-the-structure project. On an older Wilmington home, staying ahead of flashing is simply cheaper than reacting to it.

From inside it’s hard to tell — both show up as a ceiling stain near the chimney. But the cause is almost always the flashing and mortar joints where the chimney meets the roof, not the masonry itself. Corroded step flashing, a failed counter-flashing reglet, cracked sealant, or open mortar are the usual culprits, letting water in during wind-driven rain. A proper inspection checks the flashing details, the mortar crown, and the nearby pipe boots, since a bad boot often gets blamed on the chimney. We identify the real entry point and reseal or replace at the source, so the fix holds through the next storm instead of reappearing.