Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Installation Across Corona
Roof installation in Corona, CA typically costs $9,500 – $18,500 for a full tear-off and replacement on an average home, with tile running $14 – $22 per square foot and shingle running $5.50 – $8.50 per square foot installed. We schedule free estimates within 2 – 3 business days across Corona and finish most single-family tear-offs in 3 – 5 working days once materials land. The thing that makes this city different is the heat-and-wind pairing: summer temperatures that bake underlayment brittle, followed by Santa Ana gusts that lift tile and drive water under whatever has already failed. That’s why our Roof Installation process starts with an inspection of what is beneath the tiles, not just what is visible from the curb. Call (743) 200-8347 and we’ll walk your roof with you before we quote anything.
Why Mercer Roofing Is Corona’s Preferred Roof Installation Company
Corona homeowners keep calling us for one reason: we show up with a name, a photo, and a written price before a single nail is driven. Every Mercer technician is background-checked, identity-verified, and badged with photo ID at your door. We send the technician’s name and photo to you before the visit, so you know exactly who is walking up your driveway. In a city like Corona, where homes are often occupied by parents with young kids or older owners alone during the day, that badge-at-the-door promise matters more than any brochure sentence ever could.
We’re part of the Threshold Group family, founded in 2000, and every independent location operates under the Threshold Verified standard: background-checked, uniformed, photo-badged technicians on every single visit. Our dispatch and scheduling for Corona runs out of the Roofing Company - Corona Inland Empire office, so crews reach Norco, Eastvale, and the Temescal Valley corridors quickly without sitting in traffic from the coast.
Grant Whitlock runs our team, and he’s particular about one thing: no crew leaves a Corona job until the roof is watertight, the flashing is right, and the homeowner has the guarantee in hand. The 365-Day Done Right Promise means if the work is not right within a year, we make it right. Written, not implied.
TPO Roofing Installation in Corona
TPO Roofing Installation in Corona is the flat and low-slope roof replacement we recommend for the hot, flat sections on older ranch-style homes near the historic downtown core and for room additions and patio covers on 1990s tract homes. TPO is a reflective single-ply membrane that bounces back a significant share of the Inland Empire’s 105 – 110°F summer sun instead of absorbing it, which reduces cooling load on the rooms directly beneath. In Corona, a typical TPO installation over a re-decked flat roof runs $7.50 – $10.50 per square foot installed, including demolition of old roofing, new underlayment or cover board, membrane, and flashing.
We install TPO on fully adhered and mechanically fastened systems depending on deck condition and wind uplift requirements. Corona sits in a wind exposure zone that engineering tables treat more aggressively than Anaheim or Irvine, so fastening patterns and perimeter edge detail get upgraded on nearly every TPO job we do here.
When TPO Makes Sense in Corona
Homes along Main Street and older neighborhoods near Corona Heritage Park frequently have flat or near-flat additions from the 1960s and 1970s with aging composition or built-up roof sections. If you are seeing cracked cap sheet, ponding water after rain, or peeling at the parapet flashing, TPO is usually the right fix. It is single-ply, heat-welded at the seams, and handles our summers far better than torch-down or old built-up roofs ever did.
Heat and Wind Ratings on TPO
The Santa Ana winds that rip through the Temescal Valley push hard on any flat or low-slope roof edge. We spec perimeter fastening and edge metal to the current Riverside County wind exposure requirements, not to the minimum the manufacturer allows. For Corona homes with a south or east facing flat section, the reflective white TPO surface also lowers attic temperatures measurably in July and August, which protects whatever is stored up there.
Shingle Roof in Corona
Shingle Roof in Corona work is concentrated in two places: the 1950s – 1970s ranch homes near the historic downtown and select newer homes where homeowners are moving away from tile. Shingle installation in Corona runs $5.50 – $8.50 per square foot installed for architectural asphalt shingles, including tear-off, decking inspection, underlayment, and all flashing and ventilation upgrades. We install GAF, Atlas, and Tamko architectural shingles on most Corona shingle jobs, and we match the existing roof color when neighbors in tract communities want the street-facing elevation to blend.
The advantage to shingle in Corona is weight and repairability. Tile roofs weigh more than twice what shingle roofs weigh, and when a Santa Ana gust displaces a tile and the underlayment beneath has baked brittle, the repair is never small. Shingle replacements let you reset the waterproofing layer completely, then maintain or replace individual shingles later without the same heat-crumbling issue.
Shingle Over Tile: What Corona Code Allows
Corona’s building code does not permit installing shingle directly over existing clay or concrete S-tile. The tile has to come off, the decking gets inspected, and then new underlayment and shingle are installed over sound wood. Anyone quoting you shingle over tile without a tear-off is cutting a corner that will fail under Corona’s heat cycles and wind uplift. We write the permit scope to match exactly what we plan to do, so your inspector sees the same roof we quoted.
Decking Failures We Find on Older Corona Homes
On the ranch homes near downtown, decking often has old water staining or soft spots where blown-off shingles or failed flashing let water sit against the plywood for years. We price decking replacement as a per-sheet allowance written into the contract, not as a mystery upcharge after the tear-off. When we open the roof and find damage, the allowance covers it at the agreed rate. You approve any additional sheet count in writing before we move.
Trusted Brands We Service in Corona
Mercer Roofing installs and repairs GAF, Atlas, and Tamko shingle systems most often on Corona homes, and we work with the major tile manufacturers on S-tile replacements throughout south and east Corona. Because we stock common Atlas and GAF color lines for the Inland Empire market, we are not waiting on a distributor in Los Angeles when you need a patch matched or a full re-roof started. For TPO jobs we source membrane and flashing from regional suppliers we have worked with for years, so lead times stay short even during the summer rush when every roofer in Corona is buried. We also service manufacturer-backed systems, which matters if you want the warranty registered to your address rather than a generic installer’s word.
Common Roof Installation Problems We See in Corona Homes
- Heat-baked underlayment that crumbles on contact. The 30-lb felt installed on 1990s – 2000s S-tile tracts in Sycamore Creek and Eagle Glen has been through 25+ summers of 105 – 110°F heat. By the time we lift tiles for any repair, the felt often disintegrates in our hands, turning a patch into a full underlayment replacement.
- Santa Ana wind uplift that displaces tile and ridge cap. Gusts funneled through the Santa Ana Mountain passes hit Corona harder than cities just a few miles west. Ridge-cap mortar cooked by heat cycles cracks, then wind pries the cap loose and water enters along the ridge line.
- Flashing failures at valleys and penetrations that only show when it rains. On 1990s tract homes, pipe jacks, skylights, and valley metal were installed once and rarely inspected. Heat cycling opens the sealant, and the first significant rain reveals the leak long after the street-facing tile looks fine.
- Undersized or water-damaged decking beneath old roofs. In both the older ranch stock and the 1990s tracts, years of small leaks and condensation cycles can rot plywood at eaves and valleys. We write decking replacement into the contract as a transparent per-sheet allowance so it is never an after-the-fact surprise.
Pricing for Roof Installation in Corona, CA
A full tile roof installation in Corona runs $14 – $22 per square foot installed, with most 2,200 – 3,000 sq ft homes landing between $31,000 and $55,000 depending on underlayment condition and how much decking needs replaced. Shingle tear-offs run $5.50 – $8.50 per square foot, typically $13,000 – $22,000 on the same footprint. TPO on flat sections runs $7.50 – $10.50 per square foot. The single biggest variable in Corona is the underlayment: if a heat-baked felt is found during tear-off, replacement is mandatory by code, not optional. We quote that work up front when we can see tile condition, and we always write decking and underlayment allowances into the contract so the final number is never a surprise. Call (743) 200-8347 for a free written estimate, and we will walk the roof with you and explain exactly what we are seeing.
We Also Serve Cities Near Corona
Our crews serve Norco, Chino, Chino Hills, and Irvine from the same Inland Empire dispatch office that covers Corona. If you are a few minutes outside city limits or your property straddles a boundary, we will still come out. Homeowners looking for Roof Installation service anywhere in the western Riverside County and eastern San Bernardino County corridors can call the same number for the same written-price process.
Serving Corona, CA - Our Local Coverage Area
We’re based in the Corona 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 Installation in Corona
In Corona, tile roofs installed during the 1990s – 2000s boom used 30-lb felt underlayment that bakes brittle in our 105 – 110°F summers. The tiles can look perfect from the street while the felt beneath has disintegrated, and when we lift a tile for any repair we often find the underlayment crumbling on contact. Once tiles are removed, code requires a sound waterproofing layer before re-installation, so what started as a two-tile fix becomes an underlayment replacement. That is not an upsell; it is what the decking shows us. Call (743) 200-8347 and we will show you photos from your own roof so you see what we see.
Corona sits at the convergence of the Temescal Valley and the Santa Ana Mountain passes, which channels wind gusts directly into residential tracts that Anaheim or Irvine never feel at the same intensity. That means we upgrade fastening patterns, edge metal, and ridge-cap attachment on new installations in Corona, especially on east and south facing elevations. If we are replacing tile, we set the new underlayment and tile profile to current wind uplift requirements rather than whatever was code when the house went up. For flat TPO sections, perimeter fastening gets the same upgrade. Ask us to show you the wind exposure table for your specific lot.
Yes, and it happens the moment your permit triggers an inspection. In Corona, replacing the underlayment requires the decking be sound, the flashing meet current standards, and the ventilation be brought up to code where practical. On older ranch homes near downtown, that can mean adding eave and ridge ventilation that was never originally installed. We write those allowances into the contract before work begins, so when the inspector calls for an upgrade, the cost is already agreed. If the scope changes during the job, you approve the change in writing before we do the work.
A square is 100 square feet of roof surface, always rounded up on a quote. So a 2,400 sq ft footprint with a 6/12 pitch might actually be 2,900 sq ft of roof surface, or 29 squares, and the difference between footprint and roof surface is where homeowners get surprised by price. In Corona’s tile tract homes, the multiple hips and valleys on 1990s floor plans add roof surface area quickly, so we quote by roof squares measured on the actual roof, not by footprint. Ask any Corona roofer to show you their square count and compare it to your house footprint; if the numbers feel close or the pitch is steep, ask questions.
No, and we will explain why on the estimate. Corona code does not allow TPO or shingle installed directly over existing tile; the tile must come off, the decking inspected, and new underlayment installed before the new roofing goes on. That is true for TPO on any flat sections and for shingle on the sloped areas. The tear-off also gives us the chance to inspect and replace heat-damaged decking and failed flashing, which is exactly what a 25-year-old Eagle Glen roof needs. Call (743) 200-8347 and we will scope the roof surface, show you the square count, and put the full tear-off in writing before work starts.
Get Your Corona Roof Installation Estimate
We know the roofs in Corona, from the S-tile tracts of Sycamore Creek and Eagle Glen to the ranch homes near the historic core and the flat sections on older additions. We know what the heat does to underlayment, what the Santa Ana winds do to ridge cap, and how to price that reality up front so you never get a call with an unexpected change order. Every estimate is written, every technician is photo-badged and background-checked, and every job includes the 365-Day Done Right Promise in writing. Call (743) 200-8347 today and schedule your free roof installation estimate with Mercer Roofing. A live person answers, 24/7.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Corona and the surrounding Inland Empire since 2000.