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Tamko Flashing Replacement: The San Diego Owner’s Guide
Tamko flashing replacement in San Diego typically runs $280 to $640 installed per section, and we stock Tamko-compatible flashing on our trucks so most swaps happen in a single visit. Homeowners usually find out their flashing has failed when water shows up inside, not when they’re up on a ladder admiring the roofline. You’ll see a brown stain on the ceiling near a chimney, skylight, or wall junction, or you’ll spot lifted metal at the roofline while trimming a tree. That metal is flashing, and when it fails, water finds its way in fast. We replace Tamko flashing throughout San Diego, from Chula Vista up through Escondido and everywhere between, and we’ll walk you through exactly what to look for before you even pick up the phone.
Key takeaways if you’re in a hurry:
- Installed Tamko flashing replacement usually costs $280 to $640 per section in San Diego
- Most flashing failures are visible from the ground or a safe ladder position, and we can confirm them with a free written estimate
- We stock Tamko-compatible flashing on our trucks and complete most replacements in one visit
- Every repair includes a 365-Day Done Right Promise, written on the estimate before work starts
Which Tamko Models This Applies To
Flashing is a system, not a single shingle line. The same flashing profiles work across nearly all Tamko shingle series sold in San Diego: Heritage, Heritage Premium, Heritage Woodgate, Elite Glass-Seal, and Titan XT. What matters is not which Tamko shingle is on your roof, but which roof penetration is leaking. Chimney flashing, step flashing along a wall, and headwall flashing all serve different functions, and getting the profile right is where things go wrong if a contractor just grabs something off the shelf.
The OEM versus aftermarket question is worth being direct about. Tamko manufactures roofing shingles and roofing accessories, including rolled valley metal and standard flashing profiles. But most flashing on a San Diego roof is actually fabricated from galvanized steel or aluminum coil stock that any competent roofer cuts and bends on site to match the roof pitch and penetration geometry. What you need is a contractor who understands Tamko’s accessory line and knows when field-fabricated flashing is the better call. That’s us. We’re an independent San Diego roofing company, not affiliated with Tamko, and we use both Tamko-brand flashing products and code-compliant field-fabricated flashing, whichever fits your roof correctly. The correct answer is the one that keeps water out, not the one with the fancier label.
One compatibility gotcha that matters: If your original flashing was installed with aluminum and someone later patches it with galvanized steel, the two metals touching each other will corrode. Roofers see this all over San Diego, especially near the coast where salt air accelerates the process. The fix usually requires replacing the full flashing run, not just a patch. That’s what we check for on every flashing estimate we write.
Styles & brands we work with
Signs Your Tamko Flashing Replacement Is Failing
- Water staining on ceilings or walls near a chimney, skylight, or roofline junction. This is the most common way San Diego homeowners discover failed flashing. The leak occurs at the penetration, but the stain shows up three to six feet away, often after rain or Santa Ana-driven moisture. The flashing has pulled away or rusted through, and water is travelling along a rafter before it drops.
- Lifted, curled, or missing flashing metal visible from the ground. Strong coastal winds and dry heat cycles in San Diego cause flashing to expand and contract. Over five to ten years, fasteners back out and the metal lifts. You might see a gap between the flashing and the chimney or wall where the seal used to sit.
- Rust, cracking, or pinholes in exposed flashing. San Diego is hard on metal. Salt air near the coast and the marine layer compound it. Galvanized flashing that would look fine inland rusts out within a decade near Point Loma or Imperial Beach. Pinhole rust is a sure sign the flashing has lost its protective coating and water is working through.
- Crumbling or missing sealant around flashing edges. Sealant is not a permanent repair, and it breaks down under sun and heat. If the old caulk line is cracked, shrunken, or gone entirely, water has a direct path. This is especially common on chimneys where masonry movement creates recurring separation cracks.
- Granules collecting in gutters near a wall or chimney, with shingles wearing unevenly around the flashing. When flashing fails, water gets under the shingles surrounding it. Those shingles start deteriorating faster than the rest of the roof. You’ll see granule loss, curling, or staining in a pattern that traces the flashing path.
Replacement Cost & What’s Included
In San Diego, Tamko-compatible flashing replacement ranges from about $280 for a small pipe boot or vent flashing up to $640 for a full chimney or headwall flashing run. The range depends on a few things: how many flashing sections are failing, how tall the roof is, how steep the pitch is, and whether the surrounding shingles and underlayment have to be pulled back and replaced. Roofs in San Diego’s coastal areas often need a little more work because salt air accelerates metal corrosion and sealant breakdown, so a small leak can hide a wider problem once we open it up.
Every flashing replacement we do includes the new flashing (Tamko-compatible or field-fabricated to match), the full seal around the penetration, replacement of any damaged shingles or underlayment in the immediate area, and your written guarantee covering the whole repair for 365 days. You get a written price before any work starts, and the invoice matches that number, every time. No surprises. If the repair fails within the year, we come back and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s included with every job, not a separate upsell.
See the difference
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AfterDIY or Call Us?
Here’s the honest split. If you want to inspect from the ground with binoculars or look at the flashing from a ladder placed on level ground, you can spot rust, lifted metal, and failed sealant without touching anything. That’s helpful, and it tells us what to bring. What you shouldn’t do is get on a steep San Diego roof to peel back shingles, cut and bend metal, and reseal a penetration. Flashing work means working at the roof deck edge, often on a slope, with a heat gun or roofing torch nearby. Add in the fact that you’re disrupting the exact surface that keeps your ceiling dry, and a mistake gets expensive quickly. Falling off a roof is the injury that puts roofers in the hospital more than any other, and it’s not worth it for a part that costs a few hundred dollars installed.
We’ll come out, confirm what’s failed, and give you a written price before a single nail comes out. Call (619) 810-5520 and we’ll get it scheduled.
FAQs
Tamko flashing and code-compliant flashing installations in San Diego generally last 12 to 20 years, but coastal exposure can shorten that to 10 to 15 years. Galvanized steel corrodes faster in salt air, and the dry heat inland makes sealant brittle sooner. The best way to extend flashing life is regular inspection and prompt sealant replacement, which prevents the rot that turns a $300 fix into a $3,000 one. Call (619) 810-5520 if you want us to take a look.
Small failures in a single spot, like a lifted corner or a cracked sealant bead, can often be repaired without full replacement. But if the metal shows rust-through, if the flashing has pulled away along an entire run, or if water has already made it under the shingles, the honest fix is full replacement of that flashing section. Patching over a failed run buys you weeks, not years. We’ll give you the unfiltered answer when we inspect it, and the repair versus replace call is always yours to make with a written price in front of you.
Most flashing replacements take two to four hours on site. A simple pipe boot or vent flashing runs closer to the two-hour mark. A full chimney or headwall run can take the better part of a morning, especially if the surrounding shingles and underlayment need to be removed and reinstalled. We’ll set the timeline on your written estimate, and we’ll hit it. Call (619) 810-5520 for a free estimate with the schedule spelled out.
We stock Tamko-compatible flashing profiles and roll stock on our service trucks, and we can fabricate a replacement on site in most cases. If a specialized part has to be ordered, we’ll tell you before you pay a dollar and we’ll schedule the install as soon as it arrives. Mercer Roofing also works with shingle brands including GAF, Owens Corning, and CertainTeed, so if your roof has mixed manufacturers, we match what’s actually up there. Call (619) 810-5520 and we’ll tell you what we can do before we even knock on your door.
Call Mercer Roofing Co San Diego for Tamko Flashing Replacement
When your Tamko flashing fails, the water doesn’t wait. Call us at (619) 810-5520 and a live person answers, 24/7. We’ll schedule a free estimate, send you the name and photo of your technician before they arrive, and they’ll present a photo ID badge at the door before any work begins. Every flashing repair includes a written price and a written guarantee, and Grant Whitlock walks every job himself before a single nail goes in. A roof shouldn’t be something you worry about, that’s what we’re here for. Call (619) 810-5520 today.
Written by Grant Whitlock, Owner, Mercer Roofing Co San Diego at Mercer Roofing Co San Diego, serving San Diego and nearby areas.