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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Atlas Roof Inspection in San Francisco: What to Know First
An Atlas roof inspection in San Francisco typically runs $195 – $425 depending on roof size, slope, and access. We complete most inspections within 90 minutes and put findings in writing with photos and dollar ranges for any recommended work. The written price comes before any repair starts, and it does not move at the door.
This page is for San Francisco homeowners with Atlas shingles or Atlas underlayment who want an honest read on what’s holding up and what’s wearing out. If you own a home in the Sunset, Richmond, Noe Valley, Glen Park, or anywhere else in the city, call (831) 318-8819 and we’ll schedule the inspection.
Key Takeaways:
- We’re an independent Atlas service provider. We are not affiliated with or authorized by Atlas Roofing Corporation.
- Every inspection ends with a written report: photos, findings, and line-item dollar ranges.
- All repair work is backed by our 365-Day Done Right Promise in writing.
- We know which Atlas products hold up in San Francisco fog and which ones need closer watching.
How Atlas Products Fail – and How We Fix Them
Atlas makes good roofing material. But every manufacturer has weak points, and San Francisco’s marine layer has a way of finding them. Here are the failure patterns we see most often on Atlas roofs in this city.
- Atlas GlassMaster and GlassMaster High Wind shingles losing granules on fog-exposed slopes. The north-facing planes in the Sunset and Richmond sit in fog for weeks at a time. Moss spores settle in, hold moisture, and the top layer of granules starts sloughing off faster than on drier exposures. We check granule loss in the gutters first. It tells us whether the shingle mat is still protected or whether the roof is in the early stages of accelerated wear. Fix is usually localized: clean the slope, treat the moss, and replace only affected shingles if the mat isn’t exposed.
- Atlas StormMaster Slate cracking at fastener points after years of wind flex. StormMaster Slate is a heavier shingle, and in homes near the ocean or up on Twin Peaks where gusts come hard off the Pacific, we see cracks radiating from nail heads. The shingle gets stiff with age, the wind flexes it, and the fastener point is where it gives. Our fix is to replace the cracked shingles and re-secure the surrounding courses. If more than about 20 percent of a slope shows this pattern, we tell you the roof is nearing replacement and show you the numbers both ways.
- Atlas Summit 60 around pipe boots and valleys where sealant was over-applied at install. Some installers use tubed sealant like caulk, and when it cures it traps water behind it instead of shedding it. We see this most around plumbing vent pipes on older Sunset District flats. The real fix is removal, cleaning the boot flange, and reinstalling with a proper mechanical seal. Adding more sealant on top just hides the problem for another season.
- Atlas WeatherMaster peel-and-stick underlayment failing at the laps. WeatherMaster is a good product for low-slope roofs in the Mission and Bernal Heights, but if the laps were not rolled with enough pressure at install, the adhesive never fully bonds. In wet winters we get called for interior water stains and find the underlayment laps peeling back clean. We open the area, dry the decking, re-lap with new WeatherMaster or a compatible equivalent, and re-secure the roof covering above.
- Atlas HP42 synthetic underlayment tearing at the drip edge on older Victorians. The HP42 is a lighter synthetic sheet, and on steep mansards near Alamo Square where installers stretched it hard, it pulls at the eave and tears along the drip edge. That tear is a direct channel for water into the fascia. We replace the damaged section, add a proper metal drip edge if the roof lacks one, and make sure the new underlayment is secured with cap nails at the manufacturer’s spacing.
Styles & brands we work with






Our Atlas Roof Inspection Process
Here’s how a typical Atlas inspection goes when you call Brennan Roofing Co San Francisco. No surprises, no upsell theater. We look at the roof and we tell you what we see.
- 1
You call (831) 318-8819 and speak to a live person. No voicemail, no callback queue. We schedule the inspection at a time that works and confirm the address.
- 2
Our technician arrives in uniform, background-checked, on time. You know exactly who’s walking up the driveway. That’s part of The Garrison Standard, and it’s non-negotiable.
- 3
We inspect the entire roof surface, flashings, penetrations, and gutters. On Atlas roofs specifically, we check granule loss, shingle sealing at the nailing strip, underlayment condition at the eaves, and all pipe boot and vent flashings. We take photos.
- 4
We look for what a salesperson would miss or oversell. Travis Oakley instructs the crew to read the roof honestly. If a flashing can wait two seasons, we say so. If a slope needs work now, we say that too, and we show you the photo.
- 5
You get a written report with line-item dollar ranges. The price goes on paper before any work starts. No work begins until you have that number in hand and signed off.
- 6
If you approve repairs, we complete them and test the area. Water test on the repaired section, fastener check on the surrounding courses, and a final photo for your file. Every repair is guaranteed in writing for one full year under the 365-Day Done Right Promise. If it fails within that year, we come back at no charge.
See the difference
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After
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AfterWhat Atlas Roof Inspection Costs in San Francisco
Most Atlas roof inspections in San Francisco fall between $195 and $425. A straightforward single-story bungalow with easy ladder access lands around $195. A two-story Victorian with steep slopes and limited eave access can run higher, usually $350 – $425, because the inspection takes longer and we may need additional ladder and harness work.
What moves the price:
- Roof slope and height. Steeper roofs take longer to walk safely. Second and third stories add cost.
- Access. Tight side yards, skylights, solar panels, or roof decks complicate the inspection.
- Roof material and condition. Older roofs with multiple layers or visible damage require more documentation.
If we find issues and you choose to move forward with repairs, the inspection fee is credited toward the repair total. If not, you have the report and photos, and you owe nothing beyond the inspection price. Call (831) 318-8819 to schedule your inspection. Estimates are free, and the price we quote is the price you pay.
Why San Francisco Homeowners Call Brennan Roofing Co San Francisco for Atlas Work
Most roofing companies in San Francisco can look at any shingle and give you a guess. We can tell you whether that Atlas StormMaster Slate crack is fastener-related or impact-related, and whether the lap on your WeatherMaster underlayment is the original installation or an adhesion failure. That difference matters when you’re deciding between a $400 repair and a $19,000 replacement.
We operate under The Garrison Standard and The Garrison Code: background-checked, uniformed technicians on every job, a written price before any work starts, and a 365-Day Done Right Promise in writing. If a repair fails within one full year, we come back free. Phone calls are answered by a live person around the clock. And if your Atlas roof isn’t the right fit for a repair, we install and work with GAF, Owens Corning, CertainTeed, Tamko, IKO, and Boral, so you get a straight answer about options instead of a brand lecture. A good roof shouldn’t need to be talked about; it should just hold. When it doesn’t, call us.
FAQs
No. An inspection by an independent Atlas service provider does not void the manufacturer warranty. We inspect, document, and report. If we find issues during the inspection, we note them and provide written documentation you can use if you choose to file a warranty claim with Atlas.
Yes. Atlas shingles and underlayment are stocked by several Bay Area suppliers, and we can source most lines including GlassMaster, StormMaster Slate, and Summit 60 within a few business days. For older discontinued Atlas products, we’ll match a compatible current line or a quality aftermarket equivalent and show you both options with pricing before any work starts. Call (831) 318-8819 and we’ll tell you what’s available for your specific roof.
Most inspections are completed within 90 minutes on site. We schedule inspections within a few business days, and our phones are answered by a live person around the clock so you’re not waiting for a callback. If the inspection finds urgent damage like exposed underlayment in winter, we’ll document it that day and provide a written repair quote before we leave the property.
Most Atlas roof repairs in San Francisco run between $350 and $1,800 depending on the work. A single cracked or missing shingle replacement is usually $350 – $600. Flashing repairs around pipe boots or chimneys run $500 – $1,200. Larger repairs like a full underlayment section replacement on a flat roof can run $1,200 – $1,800. We’ll give you an exact written price for your specific roof before any work starts. For an accurate quote, call (831) 318-8819 for a free estimate.
It depends on the condition, the roof’s age, and the scope of damage. If less than about 20 percent of the roof shows active failure and the decking is sound, repair usually makes sense. If multiple slopes show granule loss, cracking at fasteners, or underlayment failure, replacement may be the cheaper long-term play. We’ll show you the numbers both ways in writing, and you decide. No pressure, no doorknob pricing. Call (831) 318-8819 to schedule an inspection and get the real numbers.
Written by Travis Oakley, Owner, Brennan Roofing Co at Brennan Roofing Co San Francisco, serving San Francisco and nearby areas.