Metal roofing
Architectural shingles
Tile roofing
Owens CorningFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Boral Roof Repair in San Diego: What to Know First
Boral roof repair in San Diego typically runs $325 to $1,100 for most tile and flat roof repairs, with most jobs completed in one visit. We’re an independent Boral service provider, not a manufacturer rep, which means we call the problem exactly what it is and quote you a fixed price before any work starts. If you own a home in San Diego with Boral barrel tile, flat tile, or Boral’s modified bitumen systems, this page explains the failure patterns we see most often and what repair actually costs. Call (619) 810-5520 and a live person answers, day or night.
Key takeaways:
- Boral tile roofs rarely fail at the tile itself, they fail at the underlayment, flashing, and fasteners beneath.
- We stock common Boral tile profiles for San Diego homes and can source OEM fasteners and flashing components same week.
- Every repair carries our 365-Day Done Right Promise in writing.
- Your technician’s name and photo arrive before they do, and they badge in at the door.
How Boral Products Fail – and How We Fix Them
Most Boral roofs we repair in San Diego are not failing because the tile gave out. They’re failing because something underneath or around the tile did. Here are the five Boral-specific failure modes our techs see on jobs from Chula Vista to Oceanside:
- Broken barrel tile from foot traffic. Boral’s Barcelona and Mission barrel profiles are shaped like half-cylinders, which means the crown of the tile carries all the weight when someone steps on it. Solar installers, satellite techs, and sometimes a well-meaning homeowner crack tiles this way. We match the profile and color, replace the cracked piece, and check the surrounding tiles for hairline fractures before we leave. Same-day repair in most cases.
- Underlayment failure under concrete tile. Boral concrete tile is rated to last decades, but the felt or synthetic underlayment beneath it typically makes it 20 to 30 years in San Diego’s alternating wet winters and bone-dry summers. The tile looks fine while the paper underneath turns to dust. We see this on tile installed in the late 1990s and early 2000s across Clairemont Mesa and La Jolla. The fix is a targeted underlayment replacement under affected slopes, not a full re-roof, and we’re honest about when a patch makes sense versus when the entire field is due.
- Flashing corrosion at valleys and walls. Boral roof systems depend on metal flashing at every valley, chimney, and wall junction. Original galvanized flashing in San Diego’s coastal salt air corrodes in 15 to 25 years, especially within five miles of the coast in neighborhoods like Point Loma and Pacific Beach. We pull the tile, replace the flashing with a heavier gauge, and reset the tile to Boral’s recommended lap specifications.
- Boral flat roof membrane splits and blisters. If your San Diego home has a flat section or low-slope area with a Boral modified bitumen cap sheet, the membrane eventually develops splits at seams and blisters from trapped moisture. The repair is a clean cut, a torch-down patch matched to the existing cap sheet, and a granule topcoat so the patch blends rather than standing out like a scar. We’re also seeing a lot of these roofs entering their second decade, which is exactly when Boral’s exposure to thermal cycling starts showing.
- Bird and rodent entry at Boral eave closures. Boral tile profiles leave small openings at the eaves where the tile meets the fascia. Squirrels and starlings figure this out quickly in San Diego and nest in the void space under the tile. We install bird stop closures and eave riser metal that match Boral’s profiles, sealing the gap without trapping any animals inside. If you hear scratching above the ceiling, call before the underlayment gets torn up further.
Styles & brands we work with




Our Boral Roof Repair Process
Every Boral repair follows the same sequence, whether it’s one cracked tile in North Park or flashing work on a McCormick Ranch-style home in Santaluz:
- 1
Call and describe what you see. A live person at Mercer Roofing Co San Diego answers, asks a few targeted questions about the roof age, the Boral profile, and the symptoms. You get a visit window, not a vague “sometime next week.”
- 2
We inspect before we quote. Grant Whitlock walks the roof himself on any job with uncertainty, and every technician documents what they find with photos. We look at the tile, the underlayment condition, the flashing, and the fasteners.
- 3
Written price before work. That’s the rule. You see the line items, the parts choice (OEM Boral parts where possible, approved aftermarket where OEM has been discontinued), and the total before we touch anything.
- 4
We repair with the right materials. Tile matched to Boral’s profile and color. Flashing set to Boral spec. Fasteners that won’t back out in the coastal wind. No shortcuts like sealing over flashing with tubes of caulk, which does not work on this roof type.
- 5
We test and document. If it’s a leak repair, the area gets a water test before we come down the ladder. You get photos of the finished work and the written guarantee.
- 6
Guarantee in your hand. Every Boral repair gets the 365-Day Done Right Promise in writing. If the repair fails within a year, the second visit is free. Not prorated, not argued about, free.
See the difference
Before
After
Before
After
Before
AfterWhat Boral Roof Repair Costs in San Diego
Here’s what homeowners in San Diego can expect for common Boral repairs. These are real numbers from jobs we’ve done, not a menu we quote blind over the phone:
| Repair Type | Typical Price Range |
|---|---|
| Single tile replacement (cracked or slipped) | $325 – $550 |
| Valley flashing replacement | $850 – $1,400 |
| Wall or chimney flashing repair | $650 – $1,100 |
| Underlayment patch under tile (small section) | $900 – $1,800 |
| Flat roof patch (Boral mod bit split) | $600 – $1,200 |
| Eave closure and bird stop install | $500 – $900 |
What moves the price: roof height and pitch, coastal exposure affecting flashing condition, whether adjacent tile breaks during the lift, and whether the underlayment beneath a broken tile is compromised too. We tell you all of this before we start. Call (619) 810-5520 for a written estimate, which is free.
Why San Diego Homeowners Call Mercer Roofing Co San Diego for Boral Work
Most roofing companies in San Diego can replace a tile. Very few know the difference between a Boral Barcelona and a Mission S profile, or which fasteners Boral specified for coastal wind zones. We do. And when the right part isn’t available, we also work extensively with GAF, Owens Corning, and CertainTeed systems, so you get an honest recommendation rather than a forced upsell. Before any of that, though, comes the part we think matters most: you’ll know the name and face of the person walking up your driveway before they ring the bell. Background-checked, photo ID badge at the door, clean uniform, Threshold Standard on every visit. That’s not an add-on service. It’s simply how we work.
FAQs
No, not when the repair is done properly. Boral’s warranties cover manufacturing defects in the tile itself, not installation or repairs, and using the correct profile, fasteners, and underlayment preserves whatever coverage remains on the product. We’re an independent Boral service provider and we document every repair with photos, which helps if a warranty claim ever comes up.
Usually, yes. Several Boral profiles that were common on San Diego homes in the 1990s and 2000s have been discontinued or rebranded, but we source from local salvage yards and specialty suppliers who carry matching stock. If an exact match isn’t possible, we’ll show you the closest available option and get your written approval before installing it. Call (619) 810-5520 and we’ll check availability for your profile.
Most leak repairs happen within a few days of your call. If water is actively entering the house, tell us when you call and we’ll prioritize it, often with a temporary tarp to stop the damage while the permanent fix is scheduled. A live person answers the phone 24/7, so you won’t leave a message and wonder.
If the tile itself is in good shape and the failure is confined to underlayment, flashing, or a few broken pieces, repair is the right call and will buy you years. If the underlayment is failing across multiple slopes and the roof is approaching 30 years old in San Diego’s climate, replacement starts to make more sense financially. We’ll tell you which one applies to your roof, with a written comparison if you want one.
No. The written price we give you before the job starts is the price you pay, unless you ask us to do additional work beyond the original scope. If we open up a section and find a problem we genuinely couldn’t see from the surface, we stop, explain it, and get your written approval before doing anything that would add cost. No surprises on the invoice, ever.
Written by Grant Whitlock, Owner, Mercer Roofing Co San Diego at Mercer Roofing Co San Diego, serving San Diego and nearby areas.