Think of this page as a reference you can come back to. It collects common questions about flashing repair from homeowners around Chilliwack and answers each one directly, with the reasoning behind it. Whether you landed here after typing “chimney flashing” or someone who recently had their chimney fixed sent you the link, you should leave with a clearer idea of what needs doing, what can wait and what to ask before any work begins.
They are two layers of the same seal. Step flashing is made of short, L-shaped pieces of metal tucked under each course of shingles along the sides of the chimney, so every piece overlaps the one below like the shingles themselves. Counter flashing is fastened into the mortar joints of the chimney and folds down over the step flashing, covering its top edge. Together they let the roof and the chimney move independently without opening a gap. If one layer is missing, water finds its way in. Asking about both is a good test of any company you contact about “chimney flashing”.
A masonry chimney has more parts than most people realize, and each one can need repair on its own. From the top down, you will usually find:
Inside the house sit the damper, the smoke chamber, the firebox and sometimes an ash dump. Factory-built chimneys swap the brick for a metal flue inside a framed chase with a metal cover on top.
Stains, debris and stiff moving parts inside the house are usually the first signs, long before anything looks wrong from the yard. A water mark on the ceiling beside the chimney, a musty smell when it rains, flakes of tile or mortar in the firebox and a damper that has gone stiff all point to something above. Outside, white chalky deposits on brick tell us water is moving through the masonry, and dark streaks below the cap or chase cover suggest rust. Smoke that hangs at the fireplace opening points to a draft problem. We trace each clue back to its source before suggesting any repair.
Bad chimney flashing usually shows up as water stains on the ceiling or walls next to the chimney, damp attic framing or wet insulation around the chimney’s base. Flashing is the metal that seals the joint between the roof and the chimney, and it fails when sealant dries out, fasteners back out, metal rusts or roofing work disturbs it. From the ground, look for metal that has pulled away from the brick, gaps smeared with a thick bead of tar or caulk and missing or lifted shingles around the chimney. Leaks often appear first during heavy, wind-driven rain.
Chimney flashing is repaired by resealing it when the metal is still sound or by replacing it when it is rusted, bent or installed incorrectly. Resealing means cleaning out failed caulk and applying a new flexible sealant where the counter-flashing meets the brick. Replacement involves lifting the surrounding shingles, fitting new step flashing piece by piece, cutting a groove into a mortar joint for new counter-flashing and sealing it in. Wide chimneys may also get a cricket, a small peaked diverter on the uphill side that steers water around. Sealant alone is a short-term fix when the metal underneath has failed.
A chimney repair visit normally starts with an inspection to confirm the problem and check for anything related. The technician protects the area around the fireplace and, for exterior work, sets up ladders or roof anchors. Then the damaged part is removed or prepared, whether that means grinding out mortar, cutting away old sealant, unbolting a cap or opening a damper assembly. New materials go in, and the work is checked for fit and weathertightness. At the end you should see the finished work or photos of it and hear about anything else that turned up along the way.
Not every repair needs the roof, and when one does, we plan safe access before we arrive. Work at the top of the stack means ladders, roof brackets or harnesses tied to a secure anchor, plus soft-soled footwear and pads to protect shingles. Steep or high roofs may call for extra equipment or a second technician. Wet, icy or very windy weather puts roof work on hold, because no repair is worth a fall. Jobs at the bottom of the chimney, such as an ash dump, a throat damper or a stove connection, keep us indoors, where the main concern is protecting floors and furniture from soot and dust.
In most cases, yes. Reusing old flashing under new shingles saves a little time but often shortens the life of the job, because aged metal and sealant may fail long before the new roof does. Replacing it during a reroof is simpler, since the shingles around the chimney are already off. Agree in advance who will do it, the roofer or a chimney company, and how the counter flashing will be set into the mortar joints. People who see “chimney flashing” mentioned in a roofing quote should ask whether it means new metal or simply fresh sealant over the old pieces.
Local crews know the chimneys in the area, and that knowledge saves time and guesswork. Working the same streets season after season, we learn which subdivisions have tall chimneys on steep roofs, which builders used flat chase covers that rust and which older districts still have original clay liners. That history makes the first diagnosis faster and quotes more accurate. Being close by also means we can come back to check a repair after heavy rain without it becoming a major trip. When you call Chimney Sweep Chilliwack, you reach people who work on chimneys around Chilliwack every week.
A proper look at your chimney means one less worry for everyone under your roof. We explain what we checked and what we recommend, step by step, in plain words. Call (778) 608-3976 to book flashing repair in Chilliwack.
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