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Tamko Flashing Replacement: The Woodland Hills Owner’s Guide
Tamko flashing replacement in Woodland Hills typically runs $220 to $480 installed, depending on how much flashing needs to come out and whether the surrounding shingles are still sound. We stock Tamko-compatible flashing on our trucks, so most jobs in Woodland Hills wrap up the same day we start. Homeowners usually discover the problem after a rainstorm, when a water stain appears on the ceiling near a wall line, a chimney, or a skylight, or when they spot rusted metal curling up at a roof valley or dormer edge.
Which Tamko Models This Applies To
Tamko flashing pairs with their Heritage and Titan XT shingle lines, but the flashing itself is not keyed to any single shingle model. What matters is the metal gauge and the profile, not the shingle name stamped on the bundle. Tamko roof accessories include step flashing in 4-inch and 6-inch widths, valley flashing in standard W-valley profiles, and drip edge in 2-inch and 3-inch face heights. If you have the original installation paperwork, the flashing type is listed under accessories. If you don’t, we measure the exposed face and match the profile on site. A compatibility gotcha we see regularly in Woodland Hills: Tamko’s rust-resistant galvanized flashing has a thinner gauge than some aftermarket brands, and homeowners who mix in a heavier third-party flashing create a step at the lap joint that water will find eventually. We match the original spec unless the existing flashing has already failed once, in which case we recommend stepping up to a thicker 26-gauge equivalent. Mercer Roofing Co Woodland Hills is an independent roofing contractor and not affiliated with Tamko, but we install their flashing products to manufacturer spec and match OEM dimensions when replacement is needed.
Styles & brands we work with






Signs Your Tamko Flashing Replacement Is Failing
- Water staining on ceilings or upper walls after rain. Flashing is the first line of defense at every roof penetration and transition. When it fails, water follows the framing and shows up inside, often several feet from the actual leak.
- Rusted or corroded flashing visible at the roofline. Tamko flashing is galvanized for rust resistance, but decades of Southern California sun followed by winter rain will eventually wear the coating. Once you see rust blooms on the metal face, the flashing is past its service life.
- Lifted or curled flashing at chimneys and skylights. Heat cycling in Woodland Hills summers causes metal to expand and contract. Over time, that movement breaks the sealant bond, and the flashing edges begin to lift away from the masonry or curb.
- Granules from the shingles collecting in gutters near flashing points. When flashing fails, water gets under the shingles and accelerates granule loss. If you’re seeing more granules in one downspout than another, look uphill from that spot.
- Daylight visible through the roof deck in the attic near walls or penetrations. This is the most direct sign. If you can see light coming through where a wall meets the roof, water already has a path in.
See the difference
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After
Before
After
Before
AfterReplacement Cost & What’s Included
For Woodland Hills homes, expect to pay $220 to $480 for a typical Tamko flashing replacement. A simple step flashing repair at a single wall line sits at the low end. A chimney or skylight reflash with new counterflashing and sealant runs toward the middle or upper end. The final price depends on how many linear feet of flashing need replacing, whether the surrounding shingles are reusable, and whether the roof has multiple penetrations. Every quote includes parts, labor, debris removal, and a written price before we start, so there are no add-ons when the job is done. Grant Whitlock and his crew put the number in writing upfront, and every repair carries our 365-Day Done Right Promise: if it is not right within a year, we make it right at no charge.
DIY or Call Us?
There’s a middle ground here worth being honest about. You can safely check a few things yourself: look for visible rust on exposed flashing, check the attic for daylight, and note where water stains appear inside. What we do not recommend is pulling up shingles to access the flashing yourself. Flashing is buried under the shingle course, and getting to it means removing and reinstalling roofing material. If you break the seal on the shingle tabs or nail through the wrong layer, you create a new leak where you had one before. Roof work on a ladder also carries real fall risk, and Southern California clay tile roofs make footing unpredictable. For flashing repairs, the safest call is (341) 217-2677. We’ll send a background-checked, uniformed technician whose name and photo you’ll have before they arrive.
FAQs
Tamko flashing typically lasts 15 to 20 years in Woodland Hills, though chimney flashing can fail sooner due to constant heat expansion against masonry. The sun is the bigger enemy here, not the rain, and the repeated expansion and contraction shortens the sealant bond well before the metal itself rusts through. Call (341) 217-2677 for an inspection if your flashing is past the 15-year mark.
In some cases, yes, a small section of step flashing can be repaired with sealant and a patch, but patch jobs on failed flashing tend to buy a season or two, not a decade. If the metal is still sound and only the sealant has failed, we may be able to reseal it. If the flashing is rusted, lifted, or split, replacement is the honest fix.
Most Tamko flashing replacements in Woodland Hills take 2 to 4 hours for a single penetration like a chimney or skylight. A full wall line with multiple pieces of step flashing takes about half a day. We’ll give you a time window before the work starts, and the technician will walk you through what was done before leaving.
We keep Tamko-compatible step flashing, valley flashing, and drip edge in standard profiles on our trucks, alongside flashing for GAF, Owens Corning, and CertainTeed roofs. If a job calls for a non-standard profile, our supplier network gets it to us quickly, usually within a day. A roof should be the last thing you worry about. Let’s make sure it is.
Written by Grant Whitlock, Owner, Mercer Roofing Co Woodland Hills, serving Woodland Hills and nearby areas.