Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roofing Company Across Corte Madera
Roofing work in Corte Madera costs between roughly $650 and $1,900 for most repairs, and $14,000 to $34,000 for a typical tear-off replacement, depending on pitch, decking condition, and whether we’re pulling county permits on an acreage lot. Those are real numbers we put in writing before any work starts. If you’re noticing moss on the north slope, damp ceiling corners, or granule grit in your gutters, call Mercer Roofing at (743) 200-8347 and we’ll send a background-checked, photo-badged technician whose name and picture you’ll receive before they arrive. We’ve worked the flatland ranches and hillside acreage here long enough to know that what you see from the street is rarely the whole story.
Why Mercer Roofing Is Corte Madera’s Preferred Roofing Company Company
Corte Madera homeowners call us because we show up the way we say we will. Every technician is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge at the door. That’s the Threshold Verified standard, and it’s non-negotiable across every independently owned Mercer location. Before the visit, you get the name and photo of the person coming to your house. No guessing. No stranger-at-the-door moment.
We also put the price in writing before a single nail is driven. Not a ballpark. Not a verbal estimate. A written line-item quote. And every repair we complete carries a 365-Day Done Right Promise in writing: if it’s not right within a year, we come back and make it right, at no charge, with a free second visit included if the repair fails.
Our Roofing Company team has spent enough time on Corte Madera roofs to know the fog-then-wind cycle here punishes sealants around skylights and vents faster than in Larkspur or San Rafael. We scope for that before we quote. Grant Whitlock oversees our crews to that standard on every Corte Madera job.
Roof Inspection in Corte Madera
A Roof Inspection in Corte Madera is the one service we tell every homeowner to book before buying, selling, or deferring maintenance, because the marsh-and-bay moisture belt here hides problems on the north plane that a street-level look will miss. We inspect the entire roof surface, not just what’s visible from the driveway: condition of shingles and flashing, soft spots in the decking, valley integrity, vent and skylight sealants, and moss or lichen penetration on shaded slopes. In Corte Madera specifically, we probe the north-facing planes by hand. That’s where the damage lives.
A written inspection report with photos runs $195 to $425 depending on roof size, pitch, and whether we’re also documenting for a real estate transaction. If the inspection turns into repair work, we credit the inspection fee toward the job.
What We Check on Every Corte Madera Inspection
We start with the decking. On 1950s and 1960s ranch homes, we’re looking for plywood that’s held moisture under moss and lost its rigidity. We check the nailing pattern on existing shingles, the condition of drip edge and starter strip, and whether the underlayment is still bonded at the eaves. Then we move to flashing: chimney, pipe boots, skylight curbs, and valley metal. In Corte Madera, valley flashing fails early because the marine layer keeps it wet while afternoon northwesterly winds work the sealant loose.
When to Book an Inspection, Even Without a Leak
Book one before you list your house. Corte Madera buyers increasingly ask for roof condition reports on post-war ranches, and a clean inspection with photos removes a negotiation point. Also book after storms that bring sustained wind off the bay. We’ll find lifted ridge caps and cracked sealant before water gets to the ceiling.
Commercial Roofing in Corte Madera
Commercial Roofing in Corte Madera means low-slope and flat systems that fail differently than the pitched ranch roofs across the residential flatlands. We handle TPO and modified bitumen repair, re-coating, parapet flashing, scupper and drain clearance, and full flat-roof replacement for Corte Madera storefronts, offices, and mixed-use buildings along Tamalpais Drive and near the Village. On flat roofs here, ponding water after the marine layer burns off is the first sign the drainage plane has settled wrong.
Commercial flat roof repair in Corte Madera typically runs $800 to $2,600 depending on the membrane type and the number of penetrations. Full commercial replacement generally lands between $9 and $16 per square foot installed, including tear-off of the old membrane, new insulation where needed, and code-compliant edge metal. Every commercial quote is written, line-item, and fixed before we start.
Flat Roof Drains and Parapet Flashing
We clear and inspect every drain and scupper on a commercial roof service call. A clogged drain under Corte Madera’s persistent morning damp turns a small membrane gap into a saturated deck within a season. Parapet flashing gets particular attention here because wind-driven moisture from the bay works its way under cap metal that would survive years in a drier climate.
Tenant Build-Outs and Reroofs Over Occupied Space
When a Corte Madera commercial building needs a reroof over an occupied space, we sequence the work in sections and keep the building watertight overnight. We also coordinate with Marin County building inspectors when the property falls under county jurisdiction. That coordination is part of the written quote, not an afterthought.
Trusted Brands We Service in Corte Madera
We install and repair GAF, CertainTeed, and Owens Corning shingle systems, plus IKO where a homeowner wants a specific profile. Because Corte Madera’s damp belt shortens the effective life of mid-grade shingles, we typically recommend architectural lines with better wind ratings and algae resistance. We also stock common flashing, ridge cap, and underlayment materials for fast local turnaround, so a repair on a Tamalpais Drive rancher doesn’t wait on a parts shipment from out of state. If your existing roof is one of these brands, we can match profile and color where the manufacturer still produces it.
Common Roofing Company Problems We See in Corte Madera Homes
- Root-deep moss on north-facing planes. The marine layer off Corte Madera Creek keeps the north slope damp into the afternoon, so moss anchors into the shingle mat and holds water against the decking. The south slope looks clean, but the north decking is often already soft by the time we get called.
- Valley flashing failure from the fog-then-wind cycle. Morning saturation followed by afternoon northwesterly wind repeatedly flexes valley metal and breaks the sealant bond. We see this on ranch homes across the flatlands and on steeper hillside lots near the open space.
- Skylight and vent sealant breakdown. Curb-mounted skylights on 1970s homes lose their sealant faster in Corte Madera than in inland Marin. Water finds the gap and travels sideways before it shows up on the ceiling.
- County-permit confusion on acreage. Homes on larger parcels in the Corte Madera hills often run through Marin County permitting rather than city, which changes the inspection schedule and sometimes the required underlayment. We sort that out before quoting so there’s no change order mid-job.
Pricing for Roofing Company in Corte Madera, CA
Most Corte Madera roof repairs land between $650 and $1,900. A chimney re-flash runs $450 to $850. Valley replacement typically costs $600 to $1,200 depending on length and metal gauge. Full tear-off and replacement on a standard ranch runs $14,000 to $34,000, with steep hillside pitches and county permits pushing toward the upper end. Decking replacement adds $85 to $110 per sheet when the old plywood is soft, and on Corte Madera’s north-facing planes, we often find two to six sheets that need replacement once the moss comes off. The written quote includes everything we find during our inspection. No change orders, no surprise line items. Call (743) 200-8347 and we’ll put it in writing before anything starts.
We Also Serve Cities Near Corte Madera
Our Roofing Company in Corte Madera crews also cover Larkspur, Mill Valley, Kentfield, and San Rafael. Same written pricing, same Threshold Verified technicians with photo ID at the door, same 365-Day Done Right Promise. If you’re a few minutes up 101 or across the creek, we’re already in the area.
Serving Corte Madera, CA - Our Local Coverage Area
We’re based in the Corte Madera area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roofing Company in Corte Madera
The north slope stays damp well into the afternoon because the marine layer and marsh moisture off Corte Madera Creek never fully burn off that plane the way the sun dries the south side. Moss anchors in that constant damp and holds water against the shingles, which eventually softens the decking underneath. That’s why we inspect and probe the north plane by hand before quoting any Corte Madera roof. If you see green on only one slope, call (743) 200-8347 for a written inspection and we’ll tell you exactly what’s happening underneath.
It depends on your parcel and the scope of work. Many larger Corte Madera hillside and acreage properties run through Marin County permitting rather than the Town of Corte Madera, which changes the inspection sequence and sometimes the code requirements for underlayment and ventilation. We verify jurisdiction before we finalize a quote, so the permit fees and inspection schedule are in writing from the start. Call us and we’ll pull the parcel details before you commit to anything.
Yes. On Corte Madera acreage with a well and septic system, county setback rules govern where we can place a dump trailer, material stacks, or a lift truck. We map those setback zones before we schedule delivery, which sometimes shifts staging to the street side of the property. That’s part of our pre-quote site walk, not something you discover the morning the shingles arrive.
A square is 100 square feet of roof area, and it’s the unit shingle manufacturers and roofing crews use to price materials and labor. Corte Madera ranch homes often run 18 to 26 squares on the main roof, plus garage and any additions, and steeper hillside pitches add more surface area than the footprint suggests. We ask because it directly determines the material quantity and the crew-day count in your written quote. A roof that’s actually 32 squares shouldn’t be priced as 24.
The fog-then-wind cycle saturates the roof in the morning and then drives uplift stress on ridge caps, valleys, and flashing in the afternoon. That means we spec ice and water shield in the valleys and around penetrations, use wind-rated nailing patterns on architectural shingles, and upgrade ventilation to dry the decking faster. On Corte Madera homes we’re more aggressive about those details than on an inland Marin roof, because the failure cycle here is faster and the damage hides longer. Call (743) 200-8347 and we’ll explain exactly what your roof needs for this microclimate, in writing, before any work starts.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Corte Madera and surrounding Marin County communities. Mercer Roofing is part of the Threshold Group family of home-service companies, founded in 2000.