Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Inspection Across Rohnert Park
A roof inspection in Rohnert Park typically costs $220 to $480 for a standard single-family home, and most inspections we do here can be scheduled within a few days. You’ll get a written report with photos, a prioritized repair list, and an honest read on how many years of serviceable life the roof has left. If you’re in Rohnert Park and you’re buying, selling, or just haven’t looked at your roof in five years, call Brennan Roofing at (361) 320-9467 and we’ll walk the roof top to bottom.
We know Rohnert Park roofs because we inspect them constantly, from the tight 1960s ranch houses near the golf course to the newer subdivisions off Snyder Lane. What we find almost everywhere is a roof that was built for a different climate than the one it lives in now. More on that below.
Why Brennan Roofing Is Rohnert Park’s Preferred Roof Inspection Company
Rohnert Park homeowners call us because our inspections do something most don’t: they tell you what the roof will cost over the next five years, not just whether it leaks today. Travis Oakley leads our roofing work, and he set the standard we work to on every job in Rohnert Park. That standard is The Garrison Standard, and it means the price we quote goes on paper before any work starts, the technician you meet is background-checked and in uniform, and every inspection, repair, or replacement is backed in writing for one full year.
We inspect Rohnert Park roofs the way the H-section demands: cone by cone, layer by layer, with a tape measure and a moisture meter, not from a drone or a sidewalk. Our Roof Inspection team knows that a roof that looks dry at noon off Country Club Drive can be trapping fog moisture at midnight. We scheduled for that. That’s the difference between an inspection that gives you a clean bill of health and one that tells you the truth about what’s underneath.
Our phones are answered by a live person, day or night. No voicemail, no automated system, no callback queue. When you call about a roof inspection in Rohnert Park, a person picks up. That’s never changed here and it’s not going to.
Commercial Roof Inspection in Rohnert Park
Commercial Roof Inspection in Rohnert Park means walking every plane, checking drains and scuppers, mapping the membrane seams, and determining what the building owner is actually looking at when the next heavy rain hits. We inspect flat and low-slope commercial roofs on warehouses and retail buildings in the industrial corridor near the 101, and the failure pattern is consistent: standing water that doesn’t drain, seams that have gone brittle from decades of summer heat cycling, and penetrations that were never flashed correctly in the first place. A commercial roof inspection in Rohnert Park runs $550 to $950 depending on square footage and accessibility, and it includes a written report with photo documentation and a repair-versus-replace recommendation.
Flat Roof and Membrane Evaluation
We walk low-slope commercial membranes foot by foot, probing for delamination that a visual check from a ladder won’t reveal. Rohnert Park’s hot inland valley days expand the membrane while marine-layer nights shrink it, and after enough of those cycles the seams fail long before the roof leaks. We find that and map it in a drawing, not just a description.
Drainage and Penetration Mapping
Commercial roofs in Rohnert Park fail at penetrations and drains first. We map every HVAC curb, vent stack, and drain bowl, check for ponding that exceeds manufacturer tolerance, and note where debris has dammed the flow. That map becomes the scope for repair or replacement, and it’s written down so the commercial owner can bid the work accurately.
Roof Inspection Services in Rohnert Park
Roof Inspection Services in Rohnert Park begin with the report we hand you, not the check we cashed. For a home inspection, we walk the entire roof surface on foot, inspect the attic for decking integrity and venting, check every flashing point, and test the underlayment at sample penetrations where it won’t harm the roof. We inspect detached structures too: garage roofs, carports, sheds, and ADUs. A single-family inspection in Rohnert Park runs $220 to $480; adding a detached structure generally adds $75 to $150 per building depending on size and access.
Pre-Purchase Roof Inspections
If you’re buying a house in Rohnert Park, let us inspect the roof before you sign. Sellers in this market rarely disclose overlays, and Rohnert Park’s older homes often carry two, sometimes three, layers of roofing. We document every layer, note whether the decking can support another, and give you the replacement cost in today’s dollars. That number belongs in your negotiation, and we’ll put it in writing.

Storm and Post-Season Inspections
Rohnert Park doesn’t get hurricanes, but it gets wind-driven rain off the Petaluma gap, and it gets it hard enough to peel composite tabs and lift flashing along the ridge. After big storms, we come out to check for wind damage, lifted edges, and water that got under the field. We also recommend fall inspections before the marine layer sets in for months and hides active leaks as condensation on the underside of the sheathing.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Rohnert Park
We inspect and work on roofs built with product lines from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That matters in Rohnert Park, because so many homes in the Ranch were built with era-specific shingle profiles that aren’t stocked at the big box stores. We know which materials match the original roof, we can source them locally or through our supplier network, and we won’t spec a patch that looks like a patch. If your roof uses an Atlas shake-look composite, that’s what we’ll spec for the repair. No close-enough colors, no mismatched profiles. You pick the material line, and we stand behind the installation in writing.
Common Roof Inspection Problems We See in Rohnert Park Homes
- Glue-bonded overlays on skip-sheathing. In the H-section and older parts of the Ranch, the original 1965 Cox-built roofs were installed with glue so heavy that tiles and shingles bond directly to the sheathing. Inspectors who don’t know this misread the delamination pattern and call it wear. We know what we’re looking at, and we scope a re-sheet when the decking is compromised.
- Fog-trapped moisture on low-pitch planes. The Petaluma River fog rolls over Rohnert Park most summer nights and condenses on the bottom of low-slope decking. A dry afternoon inspection can miss it completely. We schedule our Rohnert Park inspections around the dew point when we can, and we always probe the sheathing under the field, not just the visible surface.
- Septic and well setbacks hiding outbuildings. On acreage lots and larger parcels, the leach field or wellhead sits right where the inspector would normally set a ladder to reach a shop or detached ADU roof. We see inspectors skip those roofs entirely. We move the equipment around the setback, not through it, and we don’t drop the outbuilding from the scope.
- Failed ridge and soffit venting on 1960s ranches. Many original Rohnert Park ranches have inadequate venting for a roof that now carries multiple layers. We check the ridge vent and soffit path during every inspection, because a sealed-up roof with passive heat buildup will cook its own shingles from the underside, even if the surface looks fine.
Pricing for Roof Inspection in Rohnert Park, CA
A standard single-family roof inspection in Rohnert Park runs $220 to $480. That includes a full walk on the roof surface, attic access where possible, a written report with photos, and a prioritized repair list. Commercial roof inspections run $550 to $950 depending on building size and parapet access. Detached structures and ADUs add $75 to $150 each. If you’re selling and need a roof certification for the buyer’s lender, we’ll write that into the report for the same fee. Every inspection comes with a written price before we set foot on the ladder, and that number does not move at the door. Call (361) 320-9467 for a free estimate on your Rohnert Park property.
What changes the price in Rohnert Park? The age and pitch of the roof. An original 1965 Cox-built roof with three layers and glue-bonded sheathing takes longer to inspect properly, because we have to probe more carefully and document more. A newer subdivision roof on a 4/12 pitch goes faster. If your lot has septic or well setbacks that block ladder access, we account for that in the walk and the scope, and we keep the inspection fee flat unless there’s real hazard or equipment involved. You’ll always know the number before we start.
We Also Serve Cities Near Rohnert Park
Brennan Roofing provides Roof Inspection in Rohnert Park and the surrounding communities when you have outbuildings, acreage, or an older roof that needs a real walk. We cover Cotati, Petaluma, Santa Rosa, and Sebastopol with the same written-price standard and the same 365-Day Done Right Promise on every inspection and repair.
Serving Rohnert Park, CA - Our Local Coverage Area
We’re based in the Rohnert Park 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 Roof Inspection in Rohnert Park
Yes. Every roof on the property gets inspected: house, detached garage, shop, ADU, carport, and any outbuilding with an accessible roof. We scope those buildings around septic and well setbacks, not through them, and we don’t skip an outbuilding because it’s inconvenient to reach. Each structure gets its own section in the written report. Call (361) 320-9467 to schedule an inspection that covers everything on your parcel.
Because the moisture is condensing on the underside of the decking at night, not soaking through from the surface. The Petaluma River fog and marine layer roll in after dark, and the cool, damp air settles into poorly vented low-pitch roof cavities. By the time the afternoon sun dries the surface, the moisture is gone from view but still active inside the plenum. We probe the sheathing below the field as part of every Rohnert Park inspection, because that’s where the damage actually lives. Call (361) 320-9467 for an inspection that accounts for fog-loading, not just rainfall.
A square is 100 square feet of roof surface, and roofers quote replacement and major repair by the square. When you’re comparing two quotes, make sure both count the same squares, include the same scope items such as tear-off, re-sheet, underlayment, and flashing, and spec the same material line. We write our quotes line by line in squares, so you can hold them side by side with any other contractor’s bid and see exactly where the money goes. Call (361) 320-9467 and we’ll walk you through a square-by-square quote on your Rohnert Park roof.
We inspect the H-section roofs with more care and more probing, because the original 1965 Cox-built construction used glue over skip-sheathing, and that glue grabs decking fibers when you test for delamination. An inspector who treats those roofs like a modern subdivision roof will miss structural decking damage and call it surface wear. We scope the full re-sheet on H-section tear-offs up front, because a cart can’t climb that pitch without pulling the sheathing. Call (361) 320-9467 to get an inspection that knows what an H-section roof actually is.
Yes, those are the three points where commercial roofs in Rohnert Park fail first. We inspect every flashing seam, pipe boot, HVAC curb, vent stack, and drain bowl, and we document each penetration with a photo in the report. We also check the ridge vent and roof-to-wall transitions, because airflow through those points determines whether the roof stays dry inside or cooks itself from trapped heat. Call (361) 320-9467 to schedule a commercial roof inspection in Rohnert Park with a written report you can act on.
Written by Travis Oakley, Owner at Brennan Roofing, serving Rohnert Park under the Garrison Standard.






Before
After
Before
After
Before
After