Cover Roofing Nationwide

Cover Roofing: The Sherman Oaks Owner’s Guide

Cover roofing systems installed in Sherman Oaks typically run $8,000-$20,000 for a full replacement, with most repair calls for failed components landing in the $400-$1,800 range. We stock Cover-compatible membranes, flashings, and underlayment on our Sherman Oaks trucks, and we can usually inspect and quote same-day for active leaks. Most homeowners realize something’s wrong when water spots appear on the ceiling after the first Santa Ana wind event of fall, or when they notice the membrane has pulled at the parapet wall on a flat-roof section common to the mid-century ranches near the Galleria.

Call (213) 221-0788

Which Cover Models This Applies To

Cover manufactured several roofing product lines between the late 1990s and roughly 2018, with the most common in Sherman Oaks being the Cover TPO single-ply membrane series and the earlier modified bitumen rolls. The TPO lines carry a printed label on the membrane edge every six feet; if you can safely access your roof, look for a white or tan strip with “Cover” and a four-digit date code. The modified bitumen is harder to identify visually once it’s embedded in hot-mop asphalt, but it typically shows a fiberglass-reinforced surface with a sanded finish.

The critical compatibility issue is membrane thickness. Cover TPO came in 45-mil and 60-mil weights, and the 60-mil spec is what we recommend for Sherman Oaks given the UV exposure and the thermal cycling between 100°F summer days and 40°F winter nights. Aftermarket TPO from GAF or Owens Corning can match Cover’s dimensions exactly, but the weld temperature settings differ by 10-15 degrees. We calibrate our hot-air welders to the specific membrane batch, not guess. Rowan Construction Group Sherman Oaks is an independent service provider with no affiliation to Cover.

Signs Your Cover Roofing Is Failing

• Water stains on interior ceilings or walls. On Cover flat-roof systems, this usually means the membrane seam has opened at a stress point, often where the HVAC curb meets the field. The Santa Ana winds pressurize the membrane, and after 12-15 years the factory seam adhesive degrades faster than the membrane itself.
• Bubbling or tenting of the membrane surface. This is trapped moisture vapor pushing up from underneath, a sign the Cover vapor barrier has failed or was never properly detailed at the drain. In Sherman Oaks, this accelerates when homeowners add attic insulation without addressing roof ventilation.
• Cracked or chalking membrane at parapet walls. Cover’s earlier TPO formulations were susceptible to UV embrittlement at vertical surfaces where water drains slowly. The membrane looks gray and dusty; when you rub it, white residue comes off and the surface cracks under light pressure.
• Standing water more than 48 hours after rain. Cover systems were designed with 1/4″ per foot minimum slope, but settling in the San Fernando Valley’s expansive clay soils can reverse drainage toward scuppers. The water itself isn’t the problem; it’s the algae growth that degrades the membrane chemistry.
• Detached flashing at pipes or vents. Cover used a preformed boot design that relied on a compression seal. After a decade, the EPDM rubber grommet hardens and the pipe moves independently of the roof deck during thermal expansion. We see this most on the vent stacks for tankless water heaters, which cycle temperature aggressively.

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Replacement Cost & What’s Included

For Cover roofing in Sherman Oaks, repair work runs $400-$1,800 depending on how much membrane we remove and whether the substrate is salvageable. A full Cover system replacement falls in our standard $8,000-$20,000 roof replacement range, with most Sherman Oaks homes between 1,800 and 2,400 square feet landing near $12,000-$15,000 for a complete tear-off, deck inspection, and new membrane installation.

The price we write includes: removal and disposal of the existing Cover membrane, substrate repair up to two 4×8 plywood sheets, new GAF or Owens Corning TPO with welded seams, preformed flashings at all penetrations, and a 10-year workmanship warranty under our 365-Day Done Right Promise. If we open the roof and find saturated insulation or compromised structural members, we stop, photograph the condition, and present a signed change order before any additional work proceeds. That’s Clause 1 of the Haven Standard: the price is written before anyone starts, and no number changes without your signature.

DIY or Call Us?

There’s a short list of safe owner checks: confirm the drain isn’t clogged with leaves, verify the HVAC condensate line isn’t backing up onto the roof, and photograph any visible damage from a ladder if you can do so with three points of contact. What we don’t recommend is membrane repair with off-the-shelf sealants or attempting to re-weld seams with a hardware-store heat gun. TPO welding requires 600-700°F controlled airflow and a 1.5-inch overlap with proper roller pressure; an uneven weld looks fine day one and separates within a season. The parapet work is worse, since Cover systems often tie into stucco walls with embedded counterflashing that damages easily. If you’re seeing active water intrusion, call (213) 221-0788. We’ll inspect at no charge and give you a written price before any work starts.

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