CWS Roofing Nationwide

CWS Roofing: The Irvine Owner’s Guide

CWS roofing systems installed in Irvine typically run $400-$1,800 for common repairs and $8,000-$20,000 for full replacement, with most CWS-compatible parts available same-day through our supplier network. Most Irvine homeowners discover a CWS part has failed after a Santa Ana wind event, when they spot lifted ridge caps in the Woodbridge or Northwood neighborhoods, or notice water staining on the ceiling after our rare but heavy winter rains. We stock the common CWS fastener patterns, vent boots, and ridge vent assemblies that fail first in this climate, and we carry them on our trucks through Irvine and the surrounding service area.

Call (657) 227-2502

Which CWS Models This Applies To

CWS, or Custom Wood Shake, built several product lines between the late 1980s and mid-2000s that remain in service across Irvine’s older planned communities, particularly in Turtle Rock, University Park, and the original Woodbridge tracts. The three main series you’ll encounter are the CWS Natural Shake (nominal 5/8″ thickness, 18″ exposure), CWS Presidential (heavier 3/4″ profile with laminated butt ends), and the CWS Cottage (thinner 1/2″ starter-course system common on 1990s entry-level homes in the Irvine Spectrum periphery). Identification matters because the fastening pattern changes: Natural Shake used a standard 8″ headlap with ring-shank nails, while Presidential moved to a 10″ headlap and a proprietary hidden-fastener clip that CWS discontinued in 2012. We source OEM-equivalent clips from Midwest Fastener’s heritage line, or fabricate compatible stainless clips in-house when the roof geometry demands it.

The label location is your first check: CWS stamped a foil warranty tag on the underside of the third course from the ridge, visible from the attic during daylight. If that tag is gone, measure the exposure (the visible portion after overlap) with a tape from the gutter line; 14″ exposure indicates Cottage, 16″ indicates Natural Shake, 18″ indicates Presidential. For vent boots and flashing, CWS used two suppliers: Oatey on pre-2000 installs and IPS on post-2000, with incompatible base diameters. We carry both on every truck serving Irvine, because guessing wrong means a second trip and a second day of scaffolding cost.

Signs Your CWS Roofing Is Failing

• Curled or cupped shake edges, especially on south-facing slopes. CWS shakes were pressure-treated with a copper-naphthenate solution that degrades under sustained UV above 85 degrees. In Irvine, where south exposures see 280-plus days of direct sun, the treatment fails first on the rake edges. What looks like cosmetic curling is actually cellulose breakdown; the shake is no longer shedding water to the course below.
• Granule accumulation in gutters after Santa Ana events. CWS Presidential used a ceramic granule overlay for fire rating. When you find sandy residue in downspouts, the overlay has separated from the asphalt substrate underneath, usually due to thermal cycling between our 105-degree September afternoons and 55-degree marine-layer mornings. The fire rating is compromised, and the substrate is next.
• Lifted ridge caps with intact nails. This is the classic CWS clip failure. The hidden fastener corrodes where the stainless clip meets the galvanized nail in our salt-air environment, three miles inland or less. The shake stays nailed but the clip lets it pivot; wind does the rest. We’ve replaced hundreds of these in the Irvine Cove and Harbor Ridge areas, where the marine layer lingers until noon.
• Water stains on cathedral ceilings, no visible roof damage. CWS Cottage used a minimal 1/4″ plywood skip-sheathing that flexes under foot traffic. Over time the flex cracks the butt-end sealant, and water enters at the fourth or fifth course, running down the felt to the nearest penetration. The stain appears far from the actual breach.
• Sagging at the eave, paint peeling on fascia. CWS specified a 1″ drip edge on pre-1995 installs, inadequate for our occasional heavy rain. Water rolls back, wets the fascia, and rots the eave substrate from below. By the time you see exterior paint failure, the plywood edge is often punky three courses up.

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Replacement Cost & What’s Included

The range driver is deck condition. CWS systems from the 1990s were installed over plywood that met code then but not now; if we find delamination or moisture content above 19 percent, we replace the sheet rather than nail over it. Under Clause 1 of the Haven Standard, that replacement is written into the original quote as a line item with a unit price, not sprung as a surprise. Our 365-Day Done Right Promise covers labor and materials on every CWS repair we perform in Irvine.

DIY or Call Us?

There’s a safe middle ground and a hard stop. Homeowners can check the attic for light penetration, photograph any CWS foil tags they find, and clear gutters of granule buildup to assess severity. What you should not do: walk a CWS roof yourself. The skip-sheathing on Cottage systems won’t support concentrated weight between rafters; we’ve seen 200-pound homeowners put a foot through into the insulation. The Presidential clip system requires a specific release tool to avoid cracking the adjacent shake; improvised prying destroys two courses for every one you meant to fix. And any work above 15 feet on a slope steeper than 4:12 in Irvine requires Cal/OSHA-compliant fall protection, which most homeowners don’t own. If you’ve found the symptom, call (657) 227-2502 and we’ll schedule a free inspection with a written price before any work starts. Measure twice, build it once, write it down.

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