CertainTeed Roofing Nationwide

CertainTeed Roofing: The Sherman Oaks Owner’s Guide

We stock and install CertainTeed-compatible roofing components in Sherman Oaks, with most repairs running $400-$1,800 installed and full replacements at $8,000-$20,000 depending on square footage and deck condition. Most CertainTeed parts are on our trucks or available next-day through our supplier network. You’ll usually discover a problem after the first heavy winter rain, when water spots appear on the ceiling, or when you notice granules collecting in the gutter - a sign the asphalt shingle surface is breaking down faster than the underlayment beneath it.

Call (213) 221-0788

Which CertainTeed Models This Applies To

CertainTeed’s product lines span several tiers, and the part you need depends on which shingle family was originally installed. The Landmark series - Landmark, Landmark PRO, and Landmark Premium - represents the bulk of what we see in Sherman Oaks neighborhoods, particularly the 1960s-1980s ranch homes off Ventura Boulevard and the split-levels near the Galleria. These use standard 13-1/4″ × 39-3/8″ shingles with a 10″ exposure. The higher-end Belmont and Grand Manor lines are heavier laminated shingles, and their accessories (ridge caps, starter strips, hip and ridge shingles) are not interchangeable with Landmark hardware.

To identify your shingle, check the package label if you have leftover bundles in the garage, or look for a printed code on the shingle backside - usually a date stamp and manufacturing plant code. The critical spec is the exposure (the visible portion after overlap) and the total shingle weight per square. OEM CertainTeed accessories are manufactured to match the color blend and thickness profile exactly; aftermarket equivalents from Atlas or Malarkey may save 10-15% but can create a visible texture mismatch on repairs smaller than a full slope. We source both and will show you the difference side by side before you decide.

Signs Your CertainTeed Roofing Is Failing

• Curling or clawing at shingle edges. The asphalt mat dries out faster on south-facing slopes in Sherman Oaks, where summer roof surface temperatures regularly hit 160°F. Once the volatiles evaporate, the shingle curls upward (cupping) or downward (clawing), breaking the sealant strip and creating wind uplift vulnerability.
• Granule loss in gutters or downspout outlets. Those mineral granules are the UV shield; when they wash off, the asphalt underneath oxidizes and cracks within two to three seasons. Heavy granule runoff after a rain often means the shingle is past midlife even if it looks intact from the street.
• Cracked or missing ridge cap shingles. Ridge caps take the most wind and thermal stress. On CertainTeed systems, the ridge vent integration (if you have a continuous ridge vent) means a failed cap can also compromise attic ventilation, accelerating shingle aging across the whole roof.
• Flashing separation at walls or penetrations. The step flashing where a second story meets the first, or the pipe boot around plumbing vents, uses rubber collars that harden and split after 12-15 years in California sun. Water enters here silently, often traveling the deck before showing inside.
• Sagging or soft spots when walked. This is deck damage, not shingle failure, but the cause is usually long-term leakage at a failed valley or flashing point. CertainTeed’s WinterGuard ice-and-water shield (common in valley installations) can delay visible interior damage for years, masking the problem until the plywood is compromised.

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Replacement Cost & What’s Included

Here is how pricing breaks down for Sherman Oaks properties, based on what we have written on actual estimates in the past 24 months:

The range driver is almost always deck condition and access. Steep pitches above 6:12 require additional safety rigging; homes with tile or multiple layers to remove add labor hours. Every quote we write in Sherman Oaks includes the CertainTeed shingle specification by name, the underlayment type (usually DiamondDeck or RoofRunner synthetic), ice-and-water shield placement, and a line item for deck replacement if we find soft plywood once the old roofing is off. Under Clause 1 of the Haven Standard, that written price is fixed - no change order, no surprise. Our 365-Day Done Right Promise covers the workmanship; manufacturer defects are handled through CertainTeed’s own warranty channel, which we facilitate.

DIY or Call Us?

There is one thing a homeowner can safely check from the ground or a sturdy ladder: whether the problem is isolated or widespread. Binoculars and a camera with zoom will tell you if you’re looking at three curled shingles or thirty. What you cannot assess from outside is deck moisture content, whether the leak point is actually uphill from the interior stain, or whether your CertainTeed shingles contain asbestos (pre-1986 installations in the Valley sometimes do).

We do not recommend walking a pitched roof in Sherman Oaks. The composite shingles get slick with morning dew or the marine layer that rolls over the hills, and the valley neighborhoods have more 8:12 and steeper pitches than the flat-roofed areas to the east. Falls from height are the leading cause of serious injury in residential construction. For anything beyond a ground-level visual check, call us at (213) 221-0788. We will photograph what we find, explain it on the spot, and leave you with a written estimate - no charge for the visit.

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