Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roofing Company Across Covina
Roofing work in Covina is a different animal from roofing near the coast, and it starts with the heat. Our crews work under summer sun that regularly pushes past 100°F on the old ranch streets near downtown, which means we schedule tear-offs early, watch our material handling, and know how fast exposed underlayment bakes up here. We’re a Roofing Company that plans around your street, your lot line, and your neighbors from the first estimate to the final inspection. If you’re in Covina and need a straight answer about your roof, call (743) 200-8347. We’ll give you a written price before any work starts, and the person who answers the phone is a real human, day or night.
Why Mercer Roofing Is Covina’s Preferred Roofing Company
Homeowners in Covina deal with a specific set of roof problems, and we’ve seen enough of them to know what’s coming before the tarp comes off. The houses here were built fast in the 1950s and 1960s, and a lot of them are hitting the end of their second or third roof at the same time. When we bid a job on Citrus Avenue or up toward the foothills along Grand, we’re already planning for what’s underneath: old skip sheathing, double-layered composition shingles, and decking that gave up years ago.
Grant Whitlock leads our team, and the standard he set is simple: the technician’s name and photo go to you before they arrive. They show up in a clean, marked uniform, present a photo ID badge at the door, and park where you tell them to. That matters more on Covina’s tight lots than anywhere else. Your driveway might be shared. Your front walk might be the only path to the neighbor’s door. We stage around that, not through it.
Every repair we do in Covina carries a written 365-day guarantee. If a repair fails within a year, we return and make it right at no charge. Every project, from a small flashing fix to a full roof replacement, starts with a written price. No work begins without it.
Commercial Roofing in Covina
Commercial Roofing in Covina comes with constraints that don’t apply to a big-box store with a sea of parking around it. The commercial strips along San Bernardino Road, Citrus Avenue, and Badillo Street are packed tight, with shared walls, narrow service alleys, and zero room for a misplaced dumpster. When we bid a commercial roof in Covina, we’re looking at access points, trash staging, municipal work-hour limits, and how many neighboring businesses we’d be blocking with a truck.
A typical commercial roofing project in Covina runs $9 to $18 per square foot, depending on the system. That range covers everything from a simple TPO or modified bitumen recover on a small retail unit up to a full tear-off with new insulation and tapered edges to fix ponding. The older flat-roof buildings near downtown were built when insulation codes were much looser, so some jobs require adding rigid insulation to meet current energy code before the new membrane goes on.
Flat and Low-Slope Systems
Most Covina commercial buildings use TPO, EPDM, or modified bitumen. TPO holds up better in the San Gabriel Valley’s sun than older asphalt-based membranes, and it’s what we recommend for most flat roofs here. We also do re-covers where the existing roof is sound enough to accept a new layer.
Tear-Off and Deck Repair on Commercial Buildings
When a commercial roof in Covina has two layers already, California code requires a full tear-off. That’s common on buildings that have been in place since the 1960s. We handle the tear-off, inspect the deck, and pull permits before the first bit of old roofing leaves the property.
Metal Roof Installation in Covina
Metal Roof Installation in Covina is one of the smartest moves a homeowner here can make, and the reason is the heat. Standing-seam metal panels reflect more of the summer sun than any asphalt shingle on the market, and they don’t bake, crack, or shed granules the way composition does after 15 summers of 105°F days. We install standing-seam and exposed-fastener metal roofs throughout Covina, from the ranch streets near downtown to the newer subdivisions up toward Charter Oak.
A full metal roof installation on a Covina home typically runs $14 to $26 per square foot. That’s more than a shingle roof up front, and it’s worth understanding why. The material itself costs more, but the real variable here is what’s underneath the old roof. Wood shake needs full removal. Double-layer composition shingles need full removal. And on the older Covina ranches, what’s underneath is often skip sheathing, which means an added layer of OSB before the metal can go down.
Standing-Seam Panels
Standing-seam is the quiet roof. No exposed fasteners, hidden clips, and a clean look that handles Santa Ana wind gusts without rattling. We set them over solid decking with a high-temperature underlayment, and we detail the valleys and transitions so the wind doesn’t get under the panels.
Stone-Coated Steel Shingles
For homeowners who want the look of a shingle roof with metal underneath, stone-coated steel is the middle path. It’s heavier in look, lighter in weight than concrete tile, and carries a wind warranty that matters in the east-west wind corridor Covina sits in.
Trusted Brands We Service in Covina
We install and repair roofing systems from GAF, CertainTeed, Owens Corning, IKO, Atlas, and Tamko, so you’re not locked into one manufacturer’s product line. For Covina’s heat, we lean toward architectural shingles from GAF and Atlas, both of which handle high UV exposure better than standard three-tab. We can source materials locally for Covina jobs, which keeps a project moving when a color or profile needs to be matched mid-repair. Whether it’s a tile repair on a Glendora-adjacent hill home or flat roofing on a commercial unit along Badillo, we’ll tell you which brand fits the job and why, then put the choice in writing before you pay a dollar.
Common Roofing Company Problems We See in Covina Homes
- Skip sheathing under double-layer shingles. Covina’s 1950s and 1960s ranch homes were frequently roofed over 1×6 boards spaced apart, not plywood. When a roof has two layers of composition shingles on top of that, code requires a full tear-off and a new deck layer of OSB or plywood before anything new goes on. Bids that miss this add thousands in change orders mid-project.
- Granule loss from the inland heat pocket. The San Gabriel Valley traps heat against the mountains, and Covina’s summer highs of 100 – 108°F cook shingles years ahead of a coastal roof’s lifespan. We see shingles on 20-year-rated roofs losing granules and cracking at year 12 or 13.
- Party-wall flashing failures on tight lots. Covina’s older neighborhoods have homes built close, sometimes sharing walls and always sharing roofline sightlines. Flashing at a party wall that was installed wrong or is simply 60 years old lets water into both homes. A proper repair here means coordinating with the neighbor and sealing both sides.
- Ponding on low-slope ranch roofs. Roof slopes of 2:12 or 3:12 don’t shed water quickly, and after years of settling, the deck can dip enough to hold water. That ponding heat-ages the shingles beneath it and eventually rots sheathing. Flat and low-slope areas need a plan for drainage, not just new shingles.
Pricing for Roofing Company in Covina, CA
Let’s talk real numbers for Covina. A typical shingle roof replacement on a ranch home here runs $11,000 to $19,000, depending on size, pitch, and what’s underneath. If the house has two existing layers or skip sheathing, expect the decking prep to add $2,500 to $5,000 to the total. Skylight replacement runs $1,200 to $2,800 per unit. A full roof replacement including new underlayment, architectural shingles from GAF or Atlas, and proper flashing runs $8 to $12 per square foot. Tile roof replacement runs $18 to $30 per square foot. Metal roofing runs $14 to $26 per square foot. These are Covina-market numbers, not national averages. We’ll give you a written, line-item quote after a free inspection. Call (743) 200-8347 and we’ll schedule it.
We Also Serve Cities Near Covina
Mercer Roofing serves homeowners across the San Gabriel Valley. If you’re in Azusa, West Covina, Baldwin Park, or Glendora, the same written-price policy, background-checked technicians, and 365-day repair guarantee apply. Roofing Company in Covina work keeps us busy year-round, but we keep crew time open for the surrounding communities too. Call (743) 200-8347 and tell us which city you’re calling from.
Serving Covina, CA - Our Local Coverage Area
We’re based in the Covina 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 Roofing Company in Covina
Yes, Covina requires a building permit for re-roofing, including tear-off and replacement. The complication comes from what’s underneath the old roof. On Covina’s 1950s and 1960s ranch homes, a permit job often triggers a deck inspection, and when the inspector finds skip sheathing or rotted boards, the code requires a full layer of OSB or plywood before the new roof goes on. That’s a legitimate cost that changes the final number, and it’s one reason we never give a verbal estimate without looking at the deck condition first. Call (743) 200-8347 and we’ll walk the roof with you before we quote.
Covina’s older housing stock was built when code allowed two layers of composition shingles, so a lot of homes already carry both. You can’t legally add a third. On top of that, the original decking on many downtown-area ranches is skip sheathing, not plywood, which means the tear-off has to happen anyway. Layovers also trap heat, and with Covina’s 100°F+ summers, a double-layer roof fails faster than a single layer. We’ll tell you straight whether a layover is even legal on your house. For an honest read, call (743) 200-8347.
It affects staging, access, and waste disposal. If your driveway is shared, we have to coordinate dumpster placement and material drops around your neighbor’s schedule. If your house has a party wall, we have to protect the flashing on both sides, which can add detail work and a little labor. A roof on a tight Covina lot often costs 5 – 10% more than the same roof on a wide suburban lot with open access. We’ll break that out in your line-item quote. Call (743) 200-8347 and ask us to walk the lot before we price it.
Standing-seam metal wins for both. It reflects heat instead of absorbing it, and the interlocking panels handle gusty wind far better than shingles. If you want a shingle look, a high-quality architectural shingle from GAF or Atlas with a proper wind-rating will work, but expect faster aging in the San Gabriel Valley’s heat pocket. Stone-coated steel splits the difference: shingle appearance, metal longevity. For your specific roof, the answer depends on pitch, exposure, and what’s underneath. Call (743) 200-8347 and we’ll give you a written comparison.
Yes, and we do it regularly on the commercial strips along Citrus, San Bernardino Road, and Badillo. Tight-lot commercial work means managing dumpster placement, neighbor access, and city work-hour rules all at once. We plan those logistics before we submit the permit application so your business isn’t surprised mid-project. Commercial roof replacement in Covina typically runs $9 to $18 per square foot depending on the system and deck condition. Call (743) 200-8347 to have us assess your building and give you a written bid.
If your roof is giving you trouble in Covina, don’t guess at the problem or the price. Call Mercer Roofing at (743) 200-8347. We’ll send a background-checked, photo-badged technician whose name and photo you’ll see before they arrive. You’ll get a written price before any work starts, and every repair carries a 365-day written guarantee. Live person answers the phone, 24/7.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Covina since 2000.