Metal roofing
Architectural shingles
Tile roofing
Owens CorningFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Trusted Roof Installation for San Diego Homeowners
A full roof installation in San Diego typically runs between $9,500 and $25,000 depending on the material you choose, the size of your roof, and how much of the old decking needs to be replaced. At Mercer Roofing Co San Diego, we’ve been installing roofs in this city since 2000, and every job starts with a written price before any work begins. You’ll know exactly who is coming to your door before they arrive. We send each technician’s name and photo ahead of the visit, and they badge in with a photo ID when they get there. No surprises, no strangers, no gray areas. Call (619) 810-5520 to schedule your free estimate.
Shingle Roof
A Shingle Roof is the most common Roof Installation in San Diego, and for good reason: it holds up well under our coastal sun, handles the marine layer without trouble, and gives you real value per square foot. We install architectural and three-tab shingles from Owens Corning and IKO brands, which typically run $9,500 to $18,000 for a standard San Diego home. That range covers tear-off of the old roof, new underlayment, new flashing, and haul-away of debris. The final number depends on roof pitch, access, and whether the decking underneath is still sound.
What You Get With a Shingle Install
Every shingle roof installation includes a written line-item quote before work starts. That quote covers materials, labor, permits, and disposal, so nothing appears on the invoice that wasn’t on the paper you approved.
When Shingles Make Sense in San Diego
If you want a roof that performs well for 25 to 30 years, handles the San Diego sun without degrading prematurely, and keeps the upfront cost manageable, shingles are the practical choice. We see them on homes throughout Clairemont, North Park, and the beach communities, and they remain the go-to for good reason.
Styles & brands we work with
Standing Seam Metal Roof
A Standing Seam Metal Roof is a premium Roof Installation - Coronado homeowners often choose, built from vertical metal panels with concealed fasteners, and it’s the best defense against the Santa Ana winds and our salt-heavy coastal air. We install standing seam systems that typically run $22,000 to $45,000 on a San Diego home, depending on panel gauge, finish, and roof complexity. The higher upfront cost pays off in longevity: a properly installed standing seam roof can last 50 years or more with almost no maintenance. We quote these jobs with full transparency, so you know exactly what you’re paying for before the first panel goes up.
Coastal Salt and Wind Resistance
Homes in Ocean Beach, Point Loma, and Imperial Beach take constant salt spray. Standing seam metal handles that environment without the rust and fastener failures you see on cheaper systems. The concealed fastener design means there are no screw holes exposed to the weather.
Energy Performance in San Diego’s Climate
Metal reflects solar heat instead of absorbing it, which keeps attic temperatures lower during those August heat waves. We’ve had customers in East County tell us their cooling bills dropped noticeably after the switch.
Tile Roof
A Tile Roof is the classic San Diego look, and it’s the most common material we work with in older neighborhoods like Mission Hills, Kensington, and the historic districts around Balboa Park, making it a popular our Roof Installation in National City and nearby areas. Tile installation typically runs $18,000 to $38,000 depending on whether you’re installing lightweight concrete tile or traditional clay, and whether the existing roof framing needs reinforcement. Tile is heavy, so we always inspect the underlying structure before recommending it. The payoff is a roof that can last 50 to 75 years and looks better with age.
Proper Underlayment Is Everything
Tile itself sheds water, but the underlayment beneath it is what actually keeps your home dry. We use high-grade synthetic underlayment on every tile roof we install, and we inspect the flashing at every penetration, because that’s where tile roofs fail first.
Weight and Structural Assessment
Before we quote a tile roof, we check the attic framing and decking. Some older San Diego homes built in the 1950s and 1960s need additional support before tile can be installed safely. We’ll tell you plainly if that’s the case and include it in the written price.
Roof Ventilation
Roof Ventilation is a system of intake and exhaust vents that moves hot, humid air out of your attic, and it’s the single most overlooked factor in roof longevity in San Diego. We install ridge vents, soffit vents, and solar-powered exhaust fans on new roofs and retrofits. Ventilation work typically runs $500 to $2,500 as an add-on during a roof installation, though full attic ventilation systems on larger homes can reach $4,000. Proper ventilation extends the life of every roofing material by reducing heat buildup and moisture accumulation.
Signs Your Attic Is Under-Ventilated
If your upstairs rooms are noticeably hotter than downstairs in summer, or you see condensation on attic framing in winter, your ventilation is likely inadequate. We check airflow ratios on every roof installation quote and include ventilation recommendations in the written price if needed.
What Proper Ventilation Prevents
Heat damage to shingles, premature aging of underlayment, mold growth, and swollen drywall in humid months. In San Diego’s climate, a well-ventilated attic can run 20 to 30 degrees cooler in summer, which also reduces strain on your HVAC system.
Roof Flashing Installation
Roof Flashing Installation is the metal work that seals the places where your roof meets a wall, chimney, skylight, or vent pipe, and it’s the most common source of leaks in San Diego homes. Flashing installation as part of a full roof job typically runs $800 to $3,000 depending on how many penetrations your roof has and how complex the transitions are. We fabricate flashing on-site from aluminum and galvanized steel, and we replace all flashing as part of every complete roof installation, never reusing old metal. That’s how you avoid the drip spots that show up six months after a cheap job.
Where Flashing Fails First
Chimneys and skylights are the usual suspects. Old tar and caulk break down in the sun, and the metal underneath starts to rust. We inspect every flashing point during a roof installation quote and show you photographs of anything that needs attention.
Materials We Use
We match flashing material to the roof system. For shingle roofs, that’s usually galvanized steel. For tile and standing seam metal, we use aluminum or powder-coated steel that won’t stain the roof surface. Every flashing piece is bent to fit the actual dimensions of your roof, not ordered from a catalog.
TPO Roofing Installation
TPO Roofing Installation is the work of installing a single-ply thermoplastic membrane on flat or low-slope roofs, which is common on San Diego commercial buildings and an increasing number of modern residential designs with flat roof sections. TPO installation on a residential flat roof typically runs $8,500 to $16,000 depending on square footage, edge detailing, and whether insulation needs to be replaced. The white membrane reflects heat and has held up well in San Diego’s UV-intense climate when installed correctly. We install TPO from Atlas and Tamko, and every TPO job includes a written price before any work begins.
Where TPO Makes Sense in San Diego
Flat roof sections over garages, bonus rooms, and mid-century modern homes in areas like La Jolla and Rancho Santa Fe are ideal candidates for Roof Installation - Bonita and surrounding communities. TPO is lighter than built-up roofing and handles ponding water better than older systems when the slope is correct.
Common TPO Installation Mistakes We See
Improperly welded seams are the leading cause of TPO failure. We use hot-air welding equipment and probe-test every seam before we call the job done. If a seam test fails, we re-weld it. That’s the standard, and it’s in writing.
Brands We Service
We install and service shingle systems from Owens Corning and IKO, two of the most requested brands in San Diego. Owens Corning Duration shingles have become popular in our market for their wind resistance and color retention in direct coastal sun, and we’ve installed them throughout the county with consistently good results. IKO’s architectural lines offer a strong balance of cost and performance, and we’re familiar with their installation specifications down to the nailing pattern.
For flat and low-slope applications, we work with TPO systems from Atlas and Tamko. Atlas membranes are a common choice for residential flat roof sections in San Diego’s mid-century neighborhoods, and Tamko’s single-ply products are a solid value option when budget matters. Whether you have one of these brands already or you’re deciding what to install, we can walk you through the trade-offs and quote you a written price.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Water stains on ceilings or walls: A brown ring or yellowed patch means water has already gotten through your roof. Even small stains indicate a leak that will grow, and by the time you see them, the decking underneath may already be damaged.
- Granules in the gutters or at downspout outlets: Shingles shed their mineral granules as they approach the end of their life. Those granules protect the asphalt from UV rays, so their loss accelerates aging. If you see a pile of granules, your roof is farther along in its deterioration than it looks from the street.
- Missing, cracked, or curling shingles: Open gaps expose the underlayment and decking below. In San Diego’s rain storms, even one missing shingle can let water in. Curling shingles are a sign the roof has reached the end of its service life.
- Sunlight visible from the attic: If you can see light through the roof boards from inside your attic, water can get through those same gaps. This is most visible in older homes in San Diego’s historic districts, where roofs often outlive their original materials.
- Sagging areas on the roofline: A dip or wave in the roof plane means the decking below has moisture damage or the structure is compromised. This is not a polish-the-brochure situation. Call us, and we’ll send a technician who will inspect it and show you photographs of what’s happening.
Our Process, Step by Step
- 1
Schedule your free estimate. You call (619) 810-5520 and speak to a live person, any hour. We’ll set a time that works for you, and we’ll send the technician’s name and photo before the appointment so you know exactly who to expect at the door.
- 2
On-site inspection. The technician arrives in uniform, badges in with photo ID, and inspects the roof from top to bottom. We check decking condition, flashing, ventilation, and structural support. We take photos so you can see what we see.
- 3
Written line-item quote. Before any work is scheduled, you get a written price that itemizes materials, labor, permits, and disposal. Nothing starts until you approve that number in writing. If anything changes during the job, we talk to you before proceeding, and the price is updated in writing.
- 4
Installation day. We protect your landscaping and property, tear off the old roof if needed, and install the new system to manufacturer specifications. Permits are pulled, and the work is inspected by the city of San Diego before we call it complete.
- 5
Walkthrough and written guarantee. We walk the finished roof with you, show you the completed work, and hand you a written guarantee covering the installation. The 365-Day Done Right Promise covers you: if it’s not done right within a year, we make it right.
How Much Does Roof Installation Cost in San Diego?
A typical shingle roof installation in San Diego runs $9,500 to $18,000. Tile roofs range $18,000 to $38,000 depending on material weight and structural requirements. Standing seam metal runs $22,000 to $45,000. TPO on flat sections runs $8,500 to $16,000. These ranges assume a standard single-family home between 1,500 and 2,500 square feet with normal roof complexity.
What moves the price: roof pitch (steep roofs cost more to work on), the number of penetrations requiring flashing, decking condition (we often replace 20-30% of decking on older San Diego homes), and material choices. The best way to avoid overpaying is to get a written line-item quote so you can see exactly where the money goes. A free estimate from Mercer Roofing Co San Diego includes full inspection, photos of problem areas, and a written price with no obligation. We don’t pressure anyone, and we never start work without your written approval.
Our Service Area Near San Diego
We serve homeowners throughout the San Diego metro area, including El Cajon, National City, Santee, La Presa, Imperial Beach, Rancho San Diego, Winter Gardens, Casa de Oro-Mount Helix, Alpine, Bonita, and Eucalyptus Hills. If you’re reading this from home and wondering whether we cover your street, the answer is almost certainly yes. For Roof Installation in El Cajon or Roof Installation in National City, we often schedule estimates within the same week.
Serving San Diego, CA - Our Local Coverage Area
We’re based in the San Diego area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Roof Installation in San Diego
Roof installation is the complete replacement of your existing roofing system, including tear-off of the old materials, inspection and repair of the decking beneath, installation of new underlayment and flashing, and application of the new roofing material on top. It differs from repair, which addresses specific problem areas. A full installation in San Diego typically takes 2 to 5 days depending on the material and roof size.
Most shingle roof installations take 2 to 3 days. Tile and standing seam metal installations typically take 4 to 7 days depending on roof complexity and weather. We’ll give you a specific timeline in writing as part of your estimate, and we keep you informed if anything changes during the job. Call (619) 810-5520 for a timeline on your specific roof.
Shingle roofs run $9,500 to $18,000, tile roofs $18,000 to $38,000, standing seam metal $22,000 to $45,000, and TPO $8,500 to $16,000 on a typical San Diego home. Your exact price depends on roof size, pitch, material, and decking condition. The written quote we provide before any work starts is the price, no surprises. Call (619) 810-5520 for an exact quote, estimates are free.
Yes, we install and repair Owens Corning shingle roofs throughout San Diego. We’re familiar with their installation specifications including the Duration line’s nailing requirements for wind resistance, which matters in coastal and high-wind areas. If you have an existing Owens Corning roof that needs repair, we can match the shingle and color in most cases.
If your roof is actively leaking or has storm damage, we treat that as a priority. A live person answers our phone 24/7, and we’ll get a technician out to tarp the damaged area or make temporary repairs before scheduling the full installation. The same Threshold Verified standards apply on every visit: uniform, photo ID badge, and name and photo sent before arrival.
Every roof installation includes our 365-Day Done Right Promise: if anything is not done right within a year, we make it right. We also provide a written guarantee specific to your job, and we pass through manufacturer warranties on the materials we install. The manufacturer warranty covers materials, and our written guarantee covers workmanship. Both are in writing before you sign anything.
Move vehicles out of the driveway and away from the home, clear anything fragile from walls that might shake during hammering, and bring pets indoors during work hours. We’ll cover plants and shrubs near the house before we start, and we run tarps to catch debris. We’ll walk through the full preparation checklist with you at the time of the estimate. When you call (619) 810-5520 to schedule, we’ll answer any questions about preparation.
Schedule Your Roof Installation Service in San Diego Today
You deserve a roof that protects your home and a company that respects your peace of mind. Call (619) 810-5520 now for a free, no-obligation estimate on roof installation in San Diego. A live person answers the phone 24/7, and your written price is provided before any work starts. You’ll know who’s coming to your door before they arrive.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Diego, serving San Diego since 2000.