Tamko Flashing Replacement Nationwide

Tamko Flashing Replacement: The San Francisco Owner’s Guide

We stock and install Tamko-compatible flashing replacement across San Francisco, with most residential flashing repairs running between $450 and $1,400 installed depending on location, accessibility, and how much surrounding material needs to come off. The job itself usually takes half a day to a full day once we’re on the roof. Most homeowners find out their flashing has failed the hard way: a water stain on the ceiling, a damp spot near a skylight, or a drip that shows up during the first real rain after a dry stretch. Flashing is the metal or membrane material that redirects water at roof intersections: chimneys, vents, skylights, valleys, and sidewalls. When it fails, water finds the path of least resistance, and that path usually leads into your living room.

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Which Tamko Models This Applies To

Tamko flashing isn’t a single product line. The brand manufactures step flashing, counter flashing, valley flashing, and specialized kits designed to work with their shingle systems, including the Heritage, Elite Glass-Seal, and Titan XT lines. The key compatibility point with Tamko is material pairing: Tamko shingles are thicker in some lines (Titan XT runs heavier than architectural standard), which means the step flashing needs enough rise to clear the shingle thickness without creating a hump that lifts the next course. We see this most often on re-roofs where someone paired a thin big-box step flashing with a heavy Tamko shingle. The flashing bends, kinks, or doesn’t lay flat, and water sneaks behind it within a season or two. If you’re unsure what series your Tamko roof is, check the original paperwork, look for a bundle wrapper label in the attic or garage, or snap a photo of the shingle and we’ll identify it during the estimate. We work with OEM Tamko flashing where the job calls for it, and quality aftermarket step and counter flashing that matches or exceeds the original gauge. Birchbark Roofing San Francisco is an independent roofing contractor, not affiliated with Tamko. We stock what works, not what a single manufacturer tells us to stock.

Signs Your Tamko Flashing Replacement Is Failing

• Ceiling stains near the chimney or skylight after rain. The most common failure we see in San Francisco is counter flashing pulling away from the chimney or skylight curb. The sealant dries, cracks, and pulls back over time, especially in the Sunset and Richmond districts where salt air works on exterior metal year-round.
• Visible rust or corrosion on exposed flashing. Flashings are typically galvanized steel or aluminum. Once rust sets in, the metal has lost its protective layer, and pinholes are the next step. At that point, patching won’t hold; it’s a replacement.
• Lifted or missing shingles near roof valleys. When valley flashing degrades, adjacent shingles often shift or lift because their edge support has changed. A simple shingle repair may mask the issue temporarily, but the flashing underneath is still failing.
• Damp patches on exterior walls where the roof meets a vertical wall. That intersection relies on step flashing behind the wall siding. When that flashing slips or corrodes, water runs behind the siding instead of being directed over the shingles.
• Granule loss concentrated around pipe boots and penetrations. A failed pipe boot flashing lets water sit atop nearby shingles, which loosens granules faster than surrounding areas. If you have a rough patch of shingles circled around a pipe, check the flashing before assuming the shingles are the issue.

Replacement Cost & What’s Included

For Tamko flashing replacement in San Francisco, you’re looking at $450 to $1,400 installed for a typical single-flashing repair, with larger jobs like full valley replacement or multiple penetrations running higher. The range depends on three things: roof pitch (steep roofs cost more in labor because the work is slower and requires more safety setup), accessibility (a three-story Victorians in the Castro or Noe Valley costs more than a single-story ranch in the Sunset), and how much roofing material must be removed to reach the flashing. Every estimate includes the flashing material, any required sealant matched to the existing roof system, breakdown of labor, debris removal, and our written price so you know the full number before we start. If we remove two shingles and find the flashing area is fine but the underlayment has failed unexpectedly, you’ll know what that changes before we do anything. And if the work isn’t right, our 365-Day Done Right Promise means we make it right. Erik Lindgren, who runs Birchbark Roofing San Francisco, walks every estimate himself and writes everything down before a single shingle moves.

DIY or Call Us?

There are things you can check safely from the ground or from a ladder: visible rust, obvious lifted flashing, cracked sealant, shifted shingles. Those observations help you describe the problem when you call. What we don’t recommend is climbing onto a wet or steep roof to attempt a patch, especially on the Victorians and Edwardians throughout San Francisco where roof pitches run steep and old sheathing can hide soft spots. Anyone on a roof without proper fall protection is risking serious injury. Beyond safety, a temporary patch can also give a false sense of security while water keeps working its way into the decking underneath. If you’re not sure whether your Tamko flashing can hold another season, call us at (831) 228-3330 and we’ll take a look. The estimate is free, and we’ll photograph what we find so you can see the condition yourself.

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