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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
IKO Roof Repair in San Francisco: What to Know First
We provide independent IKO roof repair across San Francisco, from the Outer Sunset to Noe Valley. Most IKO shingle repairs and leak fixes on residential roofs run between $425 and $1,600 depending on the failure, and we typically complete the work in a single visit once we’ve diagnosed the problem. You’ll see your exact number in writing before a single shingle moves, which is just how the job starts with us.
This page is for San Francisco homeowners whose IKO roof is leaking, lifting, or showing wear and who want a repair that respects both the manufacturer’s design and the house underneath it. We’re an independent IKO service provider, not an authorized dealer or warranty agent, and that independence means we tell you plainly when a repair makes sense and when replacement is the honest call. If you’re seeing water stains on a ceiling or granules in the gutter, call (831) 228-3330 and we’ll walk you through what you’re looking at.
How IKO Products Fail – and How We Fix Them
- IKO Cambridge seal tab separation. Cambridge is IKO’s architectural laminate line and the one we see most often on San Francisco homes built or reroofed since the early 2000s. The problem we find repeatedly here isn’t the asphalt; it’s the seal-down adhesive strip failing early, typically because fog-season moisture sits on the roof deck longer than the manufacturer’s testing accounts for. A shingle that never fully sealed lifts in the first real wind and exposes the nail line. Our fix is a careful lift-and-reseal using an adhesive compatible with IKO’s granule surface, plus a nail check on the surrounding courses so the same wind doesn’t catch the next shingle over.
- IKO Royal Estate delamination near eaves. Royal Estate is IKO’s heavier architectural shingle, and on San Francisco roofs with shallow pitch we see delamination at the lower edges where water runs off more slowly. The shingle’s leading edge absorbs more moisture in the marine layer and eventually separates from the fiberglass mat. The owner’s symptom is usually a curled corner or a shingle that looks “fuzzy” at the edge. We replace the affected shingles and, when the underlying deck is sound, add edge sealant to slow the same failure on neighboring courses.
- Valley failures on older IKO Marathon installs. Marathon was IKO’s three-tab workhorse through the 1990s and early 2000s, and plenty of San Francisco homes still carry it. The failure we see most in the Sunset and Richmond districts is valley wear: the three-tab sections overlap in valleys and the constant fog-to-sun cycling makes the tabs brittle faster than the rest of the field. Owners report a small drip near the corner of a window or a ceiling stain under a valley line. We open the valley, replace the worn tabs with matching or better, and reseal the valley line so water moves through cleanly instead of pulling sideways under the shingles.
- Flashing adhesion loss around IKO vent boots. This one isn’t unique to IKO, but it shows up predictably on IKO systems where the shingle’s granule texture is rougher than some competitors. The flashing sealant used at the original install loses its grip against that granulated surface, especially on the vent pipe penetrations that take direct afternoon sun. You’ll see a dark stain around the pipe boot in the attic, or a slow drip in the bathroom below. We strip the old sealant, reset the boot and flashing, and use an IKO-compatible sealant that actually holds on the granule profile.
- Wind-blown Cambridge near ridge lines. Cambridge on a two-story San Francisco Victorian or Edwardian takes a beating at the ridge where the roof is most exposed to westerly winds off the Pacific. Owners often find shingles in the garden after a January storm and can’t tell which course they came from. We walk every slope to identify the lost shingles, then reinstall with a ring-shank nailing pattern placed to the manufacturer’s nail line and hand-set seals so the replacement course stays put through the next blow.
Styles & brands we work with





Our IKO Roof Repair Process
- 1
You call, a person answers. A live person picks up 24 hours a day, including nights and weekends. You tell us what you’re seeing, and we set a time that works for your schedule, not just ours.
- 2
The roof walk happens before any quote. Erik or one of our senior techs walks every slope, checks flashing at every penetration, and writes down exactly what’s failing. On IKO roofs this means checking the seal strips, the nail line, and the valleys, because those are where San Francisco’s climate does its work.
- 3
You get a written price. Before any repair begins, you receive the number in writing. Not a verbal estimate, not a range, not a “we’ll see how it goes.” It includes the materials, the labor, and the cleanup. If the dog needs to stay inside during the work, we coordinate the door schedule with you so nobody lets him out.
- 4
Parts decision, made with you. When IKO materials for your specific line are still available, we use them. When an exact match isn’t cost-effective, we’ll tell you what we propose instead, why it’s compatible, and what it means for your warranty situation. You approve the choice before anything goes on the roof.
- 5
The repair, done carefully. Shoe covers at the door, drop cloths through the hallway, nail sweeps with a magnet after the work, and a photo of the completed clean-up before the crew leaves. If you have pets, we use pet-safe products where there’s a choice.
- 6
Done right, guaranteed. Every repair is covered by our 365-Day Done Right Promise. If it’s not right, we make it right. That promise is stamped on every job we do in San Francisco.
See the difference
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After
Before
After
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AfterWhat IKO Roof Repair Costs in San Francisco
Most IKO roof repairs on San Francisco homes fall within these ranges:
- Single shingle replacement (match or close match): $425 – $650, depending on roof access and pitch
- Leak repair at a penetration (vent boot, pipe, chimney step flashing): $550 – $900
- Valley repair, including replacement of worn tabs and resealing: $800 – $1,400, depending on valley length
- Seal strip repair across a field of lifted shingles (10 – 20 shingles): $650 – $1,200
- Flashing replacement at dormer or sidewall: $750 – $1,400, depending on the metals and access
What moves the price in San Francisco: slope steepness (three-story Victorians add ladder and safety time), the age and condition of the roof deck under the shingles, and whether an exact IKO color match is still in production. We’ll give you one written number before any work starts, so you never get a “surprise” line item after the fact. Call (831) 228-3330 for a free estimate.
Why San Francisco Homeowners Call Birchbark Roofing San Francisco for IKO Work
We’ve been serving San Francisco homeowners for years, including a stretch of older Victorian and Edwardian flats in the Sunset District where the salt air and old wood sheathing keep anyone honest. We walk every slope on an IKO roof and check the seal strips, the nail lines, and the valleys before we ever quote a number, because that’s where San Francisco’s fog does the most damage.
What you get on every IKO repair: a written price before any work begins, background-checked and uniformed technicians on site, drop cloths and shoe covers as standard, a photo of the finished clean-up, and our 365-Day Done Right Promise. We work regularly with IKO, GAF, Owens Corning, and CertainTeed materials, so when a repair is better served by a compatible adjacent brand, we’ll say so plainly and show you why. Our care standard is named, not implied: Clean up like it’s our own home; Ask before we move or touch anything; Respect the family’s time and quiet hours; Explain the price before the work. We call it the C.A.R.E. values, and they’re part of every job we do in San Francisco.
FAQs
In most cases, no. A quality repair using manufacturer-compatible materials preserves whatever warranty remains on the shingles. The exception is when the repair involves a full slope tear-off or a change in material, which can trigger warranty review. We’ll tell you before any work starts whether your specific repair has any warranty implications, because you need to know that before the hammer comes out, not after. Call (831) 228-3330 to talk through what you’re seeing.
Yes, when the specific IKO line and color are still in production. IKO Cambridge colors like Harvard Slate, Dual Black, and Driftwood remain widely available, and we can tell you on the phone call whether your exact shade is current. If it’s been discontinued, we’ll show you what the closest available match looks like in person before any shingle is stripped, so there are no surprises once the new courses are down.
Most shingle replacements, seal strip repairs, and leak fixes at a single penetration are completed in one visit, usually four to six hours on site. Larger repairs like a full valley rebuild or flashing replacement along a dormer can run a full day. Before the crew leaves, you’ll get the clean-up photo and a rundown of what was fixed, what was left alone, and what to watch for in the seasons ahead.
Not usually. Lifting shingles are often a seal-down issue rather than a material failure, and repairing the seal strip and resetting the nails fixes the problem without replacing the roof. If the shingles are lifting because the mat is delaminating or the roof deck is failing underneath, we’ll show you what we’re seeing and give you an honest recommendation rather than selling you a replacement out of convenience. The estimate is free either way, and the decision stays with you.
If you have an active leak into the living space, place a bucket under the drip and, if you can reach the attic safely, note where the water is entering the deck so we can start there. Don’t climb onto a wet IKO roof, don’t nail anything down yourself, and don’t apply any sealants from the inside. Those quick fixes can push water sideways and make the leak harder to find. Call us at (831) 228-3330 and describe what you’re seeing, and we’ll tell you whether it can wait a day or needs to be checked right away.
Written by Erik Lindgren, Owner, Birchbark Roofing San Francisco at Birchbark Roofing San Francisco, serving San Francisco and nearby areas.