Santa Rosa Based, Serving Sonoma County 
(707) 540-2592 
Mon-Fri: 7AM–5PM | Sat: 8AM–2PM | Sun: Closed
Roofing Contractor in Guerneville, CA
Mario Contreras Roofing serves homeowners and business owners in Guerneville with honest roofing work backed by over 20 years serving Sonoma County. Guerneville sits along the Russian River, with redwood shade, damp mornings, and older homes tucked into wooded lots. Roofs here deal with moisture, moss, fallen leaves, and winter storms more than hot inland sun.
Whether you are near Main Street, River Road, or the Johnson Beach area, 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 Guerneville.
- Lic. Fully licensed and insured in California on every job we take.
- ES/EN Bilingual service in English and Spanish for Guerneville homeowners.
Why Guerneville Homeowners Choose Mario Contreras Roofing
Guerneville roofs need extra care because shade and river air can keep shingles damp for a long time. Moss, pine needles, leaves, and clogged gutters can hold water against the roof. We look for these problems and explain what can be repaired before bigger damage starts.
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Honest Estimates
We tell Guerneville homeowners what their roof really needs. If a repair is the right move, we will say so.
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20+ Years Local Experience
We have worked on roofs across Sonoma County for over two decades, from older homes to newer builds.
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Licensed and Insured
Every job in Guerneville is fully covered. Mario Contreras Roofing is licensed and insured in California.
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Clean Job Sites
We protect your home while we work and clean up before we leave. Your property is treated with respect.
Roof Repair, Replacement, and More for Guerneville Homes
Homes near River Road, Armstrong Woods Road, and the Russian River often sit under trees or on lots with heavy shade. That shade is nice in summer, but it can slow down roof drying after rain. When a roof stays wet, moss can grow, shingles can lift, and flashing can wear faster.
Many Guerneville homes are older cabins, river homes, and hillside properties. Some have steep roof lines, additions, or gutters that fill fast during storms. We check the roof, roof edges, valleys, vents, and gutters so you know what is safe, what needs repair, and what may need replacement.
- Residential roofing for homes, rentals, and small properties
- Commercial roofing for shops, offices, and small business buildings
- Roof replacement for aging or failing roof systems
- Roof repair for leaks, damaged shingles, flashing issues, and worn areas
- Roof inspection to check roof condition before rain or a home sale
- Composition shingle roofing, tile roofing, and metal roofing options
- Flat roofs for low-slope homes and commercial buildings
- Gutter installation, gutter repair, and skylight installation
Roofing Questions from Guerneville Homeowners
Common questions we hear from homeowners in Guerneville before they get started with a roofing project.
Why do Guerneville roofs get moss and roof stains?
Guerneville has redwood shade, river moisture, and cool mornings. That mix lets moss and algae grow on many roofs, especially on the north side of the home or under trees. Moss can lift shingles and hold water in place. If you see green patches, dark streaks, or granules in the gutters, schedule a roof inspection before winter rain makes it worse. A roof inspection can help you find the issue before it turns into a bigger repair.
Should I clean my gutters more often in Guerneville?
Yes. Homes near trees and the Russian River should keep gutters clear. Leaves, needles, and small branches can block water and push it back under the roof edge. Clean gutters help move rain away from the fascia, siding, and foundation. If your gutters sag, leak, or overflow, we can inspect them and talk about gutter repair or gutter installation.
Do you serve areas near Guerneville?
Yes. Mario Contreras Roofing is based in Santa Rosa and serves all of Sonoma County. We work in Sebastopol, Healdsburg, Windsor, and Cloverdale, as well as throughout the rest of the county. Call us at (707) 540-2592 to confirm we cover your area.
Roofing Contractor Serving Guerneville 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