Santa Rosa Based, Serving Sonoma County 
(707) 540-2592 
Mon-Fri: 7AM–5PM | Sat: 8AM–2PM | Sun: Closed
Roofing Contractor in Sebastopol, CA
Mario Contreras Roofing serves homeowners and business owners in Sebastopol with honest, dependable roofing work backed by over 20 years serving Sonoma County. Sebastopol sits close to the coast and its climate is noticeably cooler and wetter than inland Sonoma County cities. That moisture — fog, coastal rain, and damp winters — creates roofing challenges that are different from what you see in drier parts of the county. We know this area well and we know what to look for.
Whether you are near downtown Sebastopol on Main Street, out in the Gravenstein apple country along Gravenstein Highway, or in a rural property off Bodega Avenue, we offer roof repair, roof replacement, roof inspections, gutter installation, and more — with clear pricing and no pressure.
- 20+ Years roofing homes and businesses throughout Sonoma County including Sebastopol.
- Lic. Fully licensed and insured in California on every job we take.
- ES/EN Bilingual service in English and Spanish for Sebastopol homeowners.
Why Sebastopol Homeowners Choose Mario Contreras Roofing
Sebastopol's cooler, wetter climate means moss, algae, and moisture-related roof problems are more common here than in most of Sonoma County. Many homes in and around Sebastopol are older, with mature trees nearby that keep roofs shaded and damp for long stretches of the year. We understand these conditions and we know what to look for when we inspect a roof in this part of the county.
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Honest Estimates
We tell Sebastopol homeowners what their roof actually needs. If a repair makes sense, we will recommend that — not a full replacement you may not need for several more years.
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20+ Years Local Experience
We have worked roofs across Sonoma County for over two decades. We know the older homes and rural properties in and around Sebastopol and what the coastal climate does to them over time.
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Licensed and Insured
Every job in Sebastopol is fully covered. Mario Contreras Roofing is licensed and insured in California so you are protected on every project from start to finish.
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Clean Job Sites
We protect your property while we work and do a thorough cleanup before we leave. Your yard and driveway are left the way we found them when the job is done.
Roof Repair, Replacement, and More for Sebastopol Homes
Sebastopol's proximity to the coast brings consistent moisture — marine fog rolls in regularly, winters are wet, and many properties have large trees that hold shade and dampness against the roof for months at a time. That combination accelerates moss and algae growth, which holds moisture against shingles and breaks them down faster than normal. It also means gutters clog more quickly and flashing around chimneys and vents takes more abuse than in drier climates.
Many homes in Sebastopol — particularly older craftsman and farmhouse-style properties along Gravenstein Highway North and in the downtown area — are at the age where moisture damage has quietly been building for years. An inspection is often the smartest first step before committing to any repair or replacement work.
- Roof repair for leaks, damaged shingles, flashing issues, and worn areas
- Roof replacement for aging or failing roof systems
- Roof inspection to assess condition and catch problems early
- Composition shingle, tile, and metal roofing options available
- Flat roof and TPO systems for commercial properties in Sebastopol
- Gutter installation and gutter repair to protect your roofline
Roofing Questions from Sebastopol Homeowners
Common questions we hear from homeowners in Sebastopol before they get started with a roofing project.
I have moss growing on my roof — is that a problem?
Yes, and it is a common one in Sebastopol given the cool, shaded, and damp conditions here. Moss holds moisture against your shingles and gradually breaks down the asphalt over time. Left alone, it shortens the life of your roof significantly. Depending on how much growth there is and the overall condition of the shingles underneath, the fix might be a treatment and cleaning, targeted repairs, or in more advanced cases a full roof replacement. A roof inspection will tell you exactly what you are dealing with.
Does Sebastopol's wet climate mean I need to replace my roof sooner?
It can, especially on older homes with large trees nearby. The combination of coastal fog, heavy winter rain, and shade keeps roofs wet longer than in drier parts of Sonoma County. That extra moisture exposure — particularly around flashings, valleys, and any low-slope areas — tends to speed up deterioration. If your roof is 20 years or older and has not been inspected recently, now is a good time to take a look before the rainy season.
Do you serve areas near Sebastopol?
Yes. Mario Contreras Roofing is based in Santa Rosa and serves all of Sonoma County. We work regularly in Rohnert Park, Cotati, Sonoma, and Guerneville, as well as throughout the rest of the county. Call us at (707) 540-2592 to confirm we cover your area.
Roofing Contractor Serving Sebastopol and All of Sonoma County
Based in Santa Rosa, Mario Contreras Roofing serves homeowners and business owners throughout Sonoma County. Wherever you are, we bring the same honest work and dependable service.
Protect Your Home With Reliable Roofing Services