Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Boral Roofing: The San Francisco Owner’s Guide
We stock and install Boral-compatible roofing components across San Francisco, with most roof repairs running $470 to $2,125 and full replacements typically landing between $9,440 and $23,600 depending on square footage and access. If you’re reading this, you’ve likely spotted a cracked tile after a winter storm, found granules in your gutter, or noticed a damp spot on the ceiling after the fog rolled through the Richmond District. Most Boral owners in San Francisco discover a problem the same way: a visual clue outside or a water stain inside, and then the question becomes whether it’s a single part or the start of something bigger.
Boral roofing products, particularly their concrete and clay tile lines, were built for California’s dry heat. But San Francisco’s unique combination of salt air, persistent moisture, and dramatic temperature swings between neighborhoods like the Sunset and the Mission puts different stress on roofing materials than almost anywhere else in the state. We’ve worked on Boral tile roofs from Noe Valley to the Outer Richmond, and the failure patterns here are distinct: hairline fractures from thermal cycling, efflorescence from constant dampness, and fastener corrosion accelerated by marine air.
Which Boral Models This Applies To
Boral’s roofing division, before its acquisition and eventual product line transitions, produced three families most commonly found on San Francisco homes: Boral concrete roof tile (including the flat-profile and low-profile series common on mid-century moderns in the Sunset), Boral clay roof tile (seen frequently on Spanish and Mediterranean Revival homes in the Marina and Pacific Heights), and Boral steel roofing (installed more sporadically, often on hillside homes where weight mattered). Each has different part compatibility, and matching the wrong profile is a costly mistake.
The critical compatibility gotcha with Boral concrete tile is profile depth. Boral manufactured both a standard flat tile and a lower-profile variant with a shallower water channel, and the two are not interchangeable on the same roof without visible lippage that compromises water shedding. When we do a repair in San Francisco, we look for the manufacturer stamp on the underside of a removed tile. Original Boral tiles carry a date code and profile number, usually a two-letter prefix followed by three digits. If that tile is gone or illegible, we measure the tile’s overall length, width, and the depth of the interlocking side channel and match from there.
For aftermarket equivalents, quality varies widely. Some generic concrete tiles sold as “Boral-compatible” are dimensionally similar but use a different aggregate mix that weathers noticeably in San Francisco’s damp climate within three to five years, leaving a patchwork look. We generally recommend genuine Boral stock when it’s available through salvage yards we’ve vetted, or a documented aftermarket tile from a manufacturer who publishes their color-match and profile specs. For steel roofing, the fasteners matter as much as the panel: Boral steel systems specified a neoprene-washer fastener, and substituting a standard metal screw without the washer is the single most common cause of leaks we see on hillside homes in Twin Peaks and Diamond Heights.
While we’re a general contractor and not a Boral dealer, we install and repair Boral roofing components alongside other named-brand materials we work with daily, including KraftMaid, Cambria, and Silestone on the interior side. Elmstead Remodeling San Francisco is independent and not affiliated with Boral, which means our recommendation is based on what actually holds up in this city, not what a manufacturer wants moved.
Styles & brands we work with
Signs Your Boral Roofing Is Failing
- Cracked or chipped tiles visible from the ground. Concrete tiles expand and contract with San Francisco’s temperature swings, and older Boral tiles become brittle over 20+ years. Hairline cracks that start at the corner or along the water channel are the earliest warning; water gets in, sits against the underlayment, and does its damage slowly.
- Granule accumulation in gutters or at downspout bases. Boral concrete tiles shed a fine sandy grit as their surface weathers. Some granule loss is normal for a tile roof past year fifteen; heavy accumulation in one concentrated area usually points to a specific damaged tile or a section where water is channeling aggressively.
- Efflorescence or white streaking on tile surfaces. In neighborhoods like the Richmond and Sunset where fog moisture is constant, minerals leach through concrete tile and leave chalky white deposits. This isn’t cosmetic, it’s evidence water is saturating the tile body, which accelerates freeze-thaw and salt damage.
- Damp ceiling spots or peeling paint near exterior walls. By the time moisture shows up inside a San Francisco home, the exterior failure has been underway for months. The stain location usually doesn’t align directly with the roof breach because water travels along rafters and sheathing before finding a path down.
- Rust staining around tile penetrations or flashing junctions. Boral roofs rely on metal flashing at chimneys, skylights, and vent pipes. In San Francisco’s salt-heavy marine air, flashing corrodes faster than the tile around it, and rust streaks on tile below a penetration tell you the flashing has already failed.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For San Francisco specifically, roof repair on a Boral tile or steel roof runs $470 to $2,125 for the typical single-issue job: a handful of cracked tiles, a failed flashing point, or a section of damaged underlayment. A full roof replacement spans $9,440 to $23,600 depending on roof size, pitch, and whether the existing Boral underlayment needs full removal or can be overlaid. Tile roofs sold in San Francisco during Boral’s peak production years typically sit on homes ranging from 1,100 to 2,400 square feet of roof surface, and that’s the main driver of the spread.
What we include in that number: every tile or panel, underlayment, flashing, and fastener needed, in writing, before any work starts. No allowances that grow after the crew arrives. The written price is the price. We also include drop cloths on the ground and shoe covers for any interior attic access points, because roof work shouldn’t mean a dusty hallway. And before the crew leaves, we photograph the clean-up and send it to you, which is standard practice on every Elmstead job in San Francisco.
Our 365-Day Done Right Promise applies to roof repairs and replacements just as it does to the kitchens and bathrooms we’re better known for: if it’s not done right, we make it right. That’s a written commitment, not a verbal one.
DIY or Call Us?
Here’s the honest split. You can safely inspect from the ground: walk the perimeter with binoculars, check gutters for granule buildup, and look for visual cracks or missing tiles. That’s real information, and it helps you describe the problem when you call.
What we don’t recommend is getting onto a San Francisco roof to replace tile yourself. Most Boral tile roofs in this city are at a 4:12 pitch or steeper, often on three-story homes with limited access and wet, slick surfaces from morning fog. A fall from even a single-story roof is a life-changing injury, and the damp conditions common in neighborhoods like Glen Park or the Castro make tile surfaces genuinely treacherous. Beyond safety, there’s the skill issue: walking on concrete tile without cracking it requires knowing where to place weight, and underlayment work done wrong voids the roofing system’s water-shedding integrity. If you’ve spotted a problem, call our office at (831) 480-4497. We’ll walk the roof, give you a written price, and if the job is small enough, we’ll often have it done the same visit.
FAQs
Boral concrete tile roofs in San Francisco typically last 35 to 50 years, while clay tile can exceed 50, but both depend heavily on underlayment condition, which in this climate often needs replacement around year 25 to 30. Steel Boral roofing usually reaches 30 to 40 years here if the fastener washers were correctly installed. Call (831) 480-4497 and we’ll give you an honest read on what’s left in your specific roof.
Single cracked tiles can often be replaced without touching the rest of the roof, and that’s typically a $470 to $800 repair in San Francisco when we’re already doing a service visit. If cracking is widespread or the underlayment beneath has been compromised, replacement is usually the more honest long-term answer. We’ll show you photos of what we find either way.
Most single-point repairs, like replacing a handful of cracked tiles or re-flashing a chimney, take one working day in San Francisco. Full underlayment replacement over a standard 1,500-square-foot roof takes roughly three to five working days, weather permitting. We’ll give you a written timeline as part of the written price.
We keep common Boral-compatible concrete tile profiles, replacement flashing, and correct underlayment on hand in our San Francisco inventory, and we source genuine Boral tile from vetted local salvage yards when a match is needed. For less common profiles, we measure and order, which typically adds one to three days. If you tell us your roof’s approximate age and tile color when you call, we can often identify the profile before the first visit.
Written by Graham Stein, Owner, Elmstead Remodeling San Francisco at Elmstead Remodeling San Francisco, serving San Francisco and nearby areas.
