Kohler Roofing Nationwide

Kohler Roofing: The Sherman Oaks Owner’s Guide

Kohler roofing components installed in Sherman Oaks homes typically run $400-$1,800 for repair and $8,000-$20,000 for full replacement, depending on the system size and substrate condition. We stock Kohler-compatible membranes, flashing kits, and drainage assemblies for same-day installation on most calls. Most Sherman Oaks owners first notice trouble when water spots appear on ceiling drywall below a Kohler low-slope roof section, or when the integrated gutter system backs up during the first heavy rain after a dry Valley summer.

Call (213) 221-0788

Which Kohler Models This Applies To

Kohler’s roofing line centers on the Low Slope Roofing System and the Roof Drain Collection, both common on modernist homes and ADU additions across Sherman Oaks from 2015 onward. The Low Slope system uses a TPO-based membrane, typically 60-mil thickness, with prefabricated corner and pipe boot flashings that carry Kohler part numbers starting K-96xxx. The Roof Drain Collection includes the K-9136 series deck drains and K-9150 overflow assemblies, both sized for 2-inch or 3-inch DWV connections.

To identify your exact part, check the stamped model number on the drain strainer edge or the membrane seam tape backing. The Low Slope membrane is compatible with standard TPO welding equipment, but the Kohler corner flashings use a proprietary fold geometry, 14 inches on the long leg, that generic TPO boots won’t match without field modification. For drains, we source OEM Kohler gaskets and strainers and pair them with commercial-grade aftermarket clamping rings where the original cast ring has cracked, a failure we see regularly in Sherman Oaks due to thermal cycling between 105°F August afternoons and 45°F January mornings.

Rowan Construction Group Sherman Oaks is an independent service provider, not affiliated with Kohler Co.

Signs Your Kohler Roofing Is Failing

• Water staining on interior ceilings below roof drains. The Kohler K-9136 uses a clamping-ring gasket that compresses over time; when it loses resilience, water tracks along the drain body and into the ceiling cavity. In Sherman Oaks, we see this accelerate after three to four years of UV exposure on south-facing roof sections.
• Standing water more than 48 hours after rain. Kohler low-slope membranes are rated for incidental ponding, but persistent pooling indicates seam separation or subsidence in the tapered insulation below. The membrane itself may be intact while the substrate fails, a distinction that matters for whether you’re looking at repair or replacement.
• Membrane bubbling or “alligator” surface cracking. TPO formulations before 2019 were susceptible to plasticizer migration in extreme heat. Sherman Oaks roofs with minimal slope and dark ballast see this most, particularly on homes near the 405 where reflected heat from pavement adds thermal load.
• Gutter overflow at the roof edge, not the downspout. Kohler’s integrated edge detail uses a dammed transition; when the sealant bead at the membrane-to-metal joint fails, water bypasses the gutter entirely. We find this on roughly one in five Sherman Oaks inspections where the owner reported “gutter problems.”
• Musty odor from soffit vents after rain. This indicates water is entering the assembly but not yet reaching the interior finish. The Kohler membrane may have a pinhole puncture from foot traffic during HVAC service, common on homes with packaged units on the roof.

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Replacement Cost & What’s Included

What drives the range: substrate condition (plywood replacement adds $3-$5 per square foot), access difficulty (steep driveway, limited staging), and whether the original Kohler drains can be salvaged or need full replacement. Under Clause 1 of the Haven Standard, we deliver a written line-item price before any work starts. No change proceeds without a signed change order. The 365-Day Done Right Promise covers all Kohler roofing work; if it’s not done right, we make it right.

DIY or Call Us?

There’s a short list of checks any Sherman Oaks owner can handle safely. Verify that drain strainers are clear of leaves and debris. Confirm downspout flow from ground level after rain. Look for obvious membrane punctures from the roof edge if you have safe ladder access to a low-slope section.

What we don’t recommend: peeling back membrane seams to inspect welds, torquing drain clamping rings, or attempting TPO welding. The Kohler system’s warranty integrity depends on factory-specified weld temperatures and seam probe testing that requires a hot-air welder and experience reading weld bead consistency. We’ve been called to three Sherman Oaks jobs in the past two years where DIY membrane patching with consumer-grade sealant trapped water and accelerated deck rot. For drain work, the clamping ring torque spec is specific to the gasket compound; over-torque cracks the ring, under-torque leaks.

We carry Kohler-compatible membranes, gaskets, and drain assemblies on our service trucks. Call (213) 221-0788 to schedule your free estimate.

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