IKO Flashing Replacement Nationwide

IKO Flashing Replacement: The Los Angeles Owner’s Guide

IKO flashing replacement in Los Angeles typically runs $340 – $780 installed, depending on how many linear feet need work and whether the underlying deck is still dry. We stock IKO-compatible step flashing, counter flashing, and drip edge profiles on every Crestview truck, and most single-section replacements are completed in under three hours. Most Los Angeles homeowners spot the problem first as a water stain spreading across a ceiling or a musty smell in the attic after our rare but heavy winter rains.

Call (325) 246-5075

Flashing – the thin metal strips that seal the joints where your roof meets walls, chimneys, vents, and skylights – is where IKO systems most commonly leak when they age past 15 years. In Los Angeles, the combination of intense UV exposure and thermal cycling (80°F days dropping to 45°F nights in winter) fatigues the metal faster than the shingles themselves. Dylan Pace, who grew up patching roofs in Glassell Park, still sees original IKO installations from the 2005 – 2012 building boom failing at the flashing first, not the field shingles.

Which IKO Models This Applies To

IKO has used several flashing-compatible profiles across their shingle lines, and matching the right replacement matters for warranty coverage and water tightness.

• Cambridge Architectural shingles (2005 – present): Uses standard 8-inch step flashing with a 4-inch wall leg; most common on San Fernando Valley ranch houses built during the mid-2000s boom.
• Marathon Plus AR (discontinued 2018, still widely in service): Requires slightly narrower 6-inch step flashing due to the lower exposure height; using standard 8-inch can create a visible bump and wind-lift risk.
• Cambridge Cool Colors / Dynasty: Same flashing specs as standard Cambridge, but the heavier shingle weight means we use 26-gauge minimum rather than 28-gauge to prevent fastener pull-through.
• How to identify yours: Check the shingle bundle wrapper in your garage or attic, or look for the IKO lot number stamped on the back of an exposed shingle tab (usually a 6-digit code starting with the year).

We install OEM IKO flashing where it’s available and code-compliant, but we also carry quality aftermarket equivalents from Midwest Manufacturing and Boral that match IKO specs exactly and often ship faster. Every promise in writing – that’s just how we do it. Crestview Roofing is an independent service provider, not affiliated with IKO.

Signs Your IKO Flashing Replacement Is Failing

• Water stains on interior ceilings or walls, especially after Santa Ana wind events. The hot, dry winds shrink flashing fasteners and caulk, opening hairline gaps that normal rains then exploit. In Los Angeles, we see this spike every November when the first real storm hits after months of baking heat.
• Rust streaks running down the face of brick chimneys or stucco walls. IKO’s factory-coated galvanized flashing loses its protective layer at the cut edges and fold points; once rust starts, the metal thins from the inside and leaks follow within two seasons.
• Lifted or curled shingles at wall intersections. Failed step flashing no longer holds the shingle edge down, so wind gets underneath and starts a peel-back that exposes the deck. This is especially common on east-facing walls in Los Angeles, where morning sun heats the metal while the shingle stays cool and stiff.
• Daylight visible from the attic where the roof meets a dormer or chimney. The flashing has separated from the wall or pulled away from the deck nails; even a 1/8-inch gap funnels surprising amounts of water during our occasional February downpours.
• Granule accumulation in gutters below chimney or vent areas. This signals the shingle is flexing excessively because the flashing beneath it has corroded or dislodged, breaking the support plane that keeps the shingle flat.

Replacement Cost & What’s Included

Most IKO flashing replacement jobs in Los Angeles fall between $340 and $780. Here’s how that breaks down:

What drives the range: accessibility (steep pitches or tight alley access in older Los Angeles neighborhoods like Echo Park add labor time), whether the underlying plywood needs patching, and whether we need to remove and reset existing shingles or have matching replacements on hand. Every Crestview quote is a written, line-item price delivered before any work starts – the number on the page is the number on the invoice. The 365-Day Done Right Promise covers every repair for a full year, including a free second visit if anything fails, in writing, included with every job.

DIY or Call Us?

There’s a safe middle ground here. A homeowner can check attic spaces for daylight gaps, photograph rust streaks from the ground with a zoom lens, and clear gutters to improve drainage – all useful information that speeds our diagnosis.

But flashing replacement involves working at height on a sloped surface, removing shingles without tearing them, cutting and folding metal to precise angles, and sealing with manufacturer-compatible caulk. In Los Angeles, permit requirements vary by municipality: unincorporated L.A. County and the City of Los Angeles both require licensed contractor work for flashing replacement on roofs over one story. More importantly, a misaligned piece channels water straight into the wall cavity, and you won’t know until the drywall mushrooms. We pull permits where required, pass inspections, and document everything with before-and-after photos sent to your phone.

Call (325) 246-5075 to schedule your free estimate. We’ll give you a written price, a live trackable arrival time, and photo proof the work was done right.

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