Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roofing Company Across Whittier
If you’re searching for a roofing company in Whittier, CA, you’re likely looking at a specific problem: an aging tile roof on a 1930s Spanish Colonial, a leak that appeared after the last Santa Ana wind event, or a buyer’s inspection report flagging dry rot before a sale closes. A typical roof repair in Whittier runs $350 – $1,200, a full replacement on an older Craftsman or Spanish Colonial runs $12,000 – $22,000 depending on decking condition, and most inspections we do in this city take 60 – 90 minutes. We know Whittier’s housing stock, its fault-line history, and its hillside wind patterns. That local knowledge changes what we look for and how we price the work. Call (743) 200-8347 for a written estimate from a Roofing Company that sends a badged, background-checked technician to your door.
Key Takeaways
- Whittier sits on the Whittier Fault. Pre-1990 roofs often carry seismic damage from the 1987 Whittier Narrows quake that was only cosmetically patched.
- Hillside tracts above Colima Road face Santa Ana wind uplift that fails clay tile ridge caps quickly when installers skip the foam adhesive bead.
- Every Mercer Roofing job in Whittier starts with a written price and a written guarantee. No exceptions.
- You’ll know your technician’s name and see their photo before they arrive. They’ll badge in at the door.
Why Mercer Roofing Is Whittier’s Preferred Roofing Company
Whittier homeowners call us because we treat their roof as one part of a house with a specific history, not as a generic project. That matters here. The 1920s – 1950s Craftsman bungalows and Spanish Colonial Revival homes that define much of Whittier’s older neighborhoods, from Uptown out toward Michigan Park, were built under codes that didn’t account for the Whittier Fault. Many roofs in this city still carry original clay or concrete tile over skip-sheathing or first-generation plywood decking. A roofer who only looks for weather wear will miss what we routinely find: hairline cracks at roof-to-wall connections, displaced flashing along chimney saddles, and ridge cap mortar that’s quietly failing.
Every Mercer Roofing technician is background-checked, identity-verified, and trained under the Roofing Company in Whittier standard known as Threshold Verified. You receive the technician’s name and photo before the visit. They arrive in a clean, marked uniform and present a photo ID badge at the door. For homeowners who are often home alone, for parents with young children, for older Whittier residents who want proof of who’s at the door before they open it, this is the most concrete thing we offer.
We’re part of the Threshold Group family, founded in 2000. Each location is independently owned and operated. This Whittier crew is led by Grant Whitlock, and dispatch and scheduling are coordinated from the brand’s Los Angeles office. Crews serve Whittier locally.
Commercial Roofing in Whittier
Commercial Roofing in Whittier often means flat or low-slope membrane systems on aging retail and office buildings along Whittier Boulevard, Washington Boulevard, or the industrial pockets near the 605. We handle TPO, EPDM, and modified bitumen roofs, plus the structural decking repairs these roofs reveal once you strip them back. A typical commercial flat roof replacement in Whittier runs $7,000 – $18,000 depending on square footage and deck condition, and most commercial repairs we quote land between $400 and $2,500.
Whittier’s commercial buildings share the same seismic history as its homes. Flat roof parapets and rooftop HVAC curbs on pre-1990 structures often carry the same roof-to-wall connection stress we see on residential properties. We photograph every condition we find and put the scope in writing before work begins.
Flat Membrane Repairs and Parapet Work
We service low-slope commercial roofs across Whittier’s older retail corridors. Water ponds on flat roofs in this city, especially after winter storms, and that standing water works its way into seams and penetrations faster than most owners expect. We repair seams, replace failed flashing at parapets and scuppers, and reinforce rooftop penetrations.
When a parapet wall shows cracking or the membrane has pulled away at the roof edge, that’s often seismic movement from the fault line, not just weather. We inspect the connection and recommend repairs that account for it.
Re-Roofing Whittier Strip and Retail Buildings
For strip malls and standalone retail buildings in Whittier, a full re-roof usually means tearing off old built-up roofing or aged single-ply membrane, repairing any rotten decking, and installing a new membrane system with new edge metal. We write the decking allowance into the contract so you know what’s covered.
Metal Roof Installation in Whittier
Metal Roof Installation in Whittier is growing in the hillside neighborhoods above Colima Road and along Mar Vista as homeowners look for a roof that holds up to Santa Ana wind uplift and UV exposure better than composition shingles. A standing seam metal roof on a typical Whittier home runs $16,000 – $30,000. A metal re-roof over an existing roof costs less, but we rarely recommend that here given the decking conditions we find on older homes.
Whittier’s inland San Gabriel Valley position makes it noticeably hotter than coastal LA. Composition shingles in this city degrade faster from UV than they do in Long Beach or Huntington Beach. Metal reflects that heat and holds its fasteners through wind events that lift shingles and crack tile mortar. On hillside lots where crane access is tight and lot grades are irregular, metal panels handle the logistics better than heavy tile.
Standing Seam for Hillside Whittier Homes
Standing seam panels interlock vertically, which gives the roof a continuous surface that doesn’t present the same uplift edge as individual shingles or tiles. We install concealed fastener panels on Whittier hillside homes where wind exposure from the Puente Hills corridor is strongest.
We also verify the roof decking and framing before any metal goes on. On pre-1990 Whittier homes, that means checking for seismic stress at the roof-to-wall connection and confirming the framing can carry the new system.
Metal Over Tile Conversion
Some Whittier homeowners want to convert an old, heavy clay or concrete tile roof to lighter metal. That’s a job we do carefully here. The tile comes off, the decking gets inspected, and we often find skip-sheathing that needs to be overlaid with plywood before the underlayment and metal go down. We price that decking work in writing before any tear-off starts.
Trusted Brands We Service in Whittier
Mercer Roofing installs and repairs shingle and tile systems from GAF, CertainTeed, Owens Corning, and Boral, among other manufacturer-recognized brands. We recommend Boral tile on many Whittier Spanish Colonial and Craftsman re-roofs because it matches the original roof profile those homes were designed around. For composition shingle replacements, GAF and Owens Corning hold up well in Whittier’s inland heat when installed with proper ventilation. Because our crews work Whittier regularly, we keep local stock of common flashing profiles, ridge cap tiles, and underlayment on hand for faster turnaround. No waiting on a parts order from across the county.
Common Roofing Company Problems We See in Whittier Homes
- Seismically-stressed roof-to-wall connections. The 1987 Whittier Narrows earthquake left many pre-1990 Whittier homes with connections that were cosmetically patched but never structurally reinforced. We inspect rafters, top plates, and anchor bolts for signs of movement before we touch the roof surface.
- Displaced flashing at chimneys and valleys. Whittier’s older chimneys, especially cracked crowns on 1930s and 1940s Spanish Colonials, let water behind the flashing after a quake shifts the masonry. We reflash these areas and repair the crown before new underlayment goes down.
- Ridge cap mortar failure on hillside clay tile roofs. Santa Ana winds funneling through the Puente Hills corridor pop the mortar on ridge caps and rake tiles, especially on south- and west-facing exposures. We bed ridge caps with a foam adhesive bead so the same failure doesn’t recur in three years.
- Skip-sheathing rot under original tile. Many Whittier homes still have original skip-sheathing or first-generation plywood decking under clay tile. Years of Santa Ana-driven moisture, plus the heat, leave that decking soft. We mark every soft sheet for replacement before new underlayment goes on.
Pricing for Roofing Company in Whittier, CA
A roof repair in Whittier typically runs $350 – $1,200. A full roof replacement on an older Whittier home runs $12,000 – $22,000, with hillside tile re-roofs above Colima Road sometimes pushing toward $30,000 when decking replacement and seismic tie-in work are required. Commercial flat roof replacements land between $7,000 and $18,000. Metal roofing installation runs $16,000 – $30,000 on a typical Whittier single-family home.
What actually drives price in Whittier is what we find when the old roof comes off. On a 1940s Spanish Colonial, that’s usually cracked decking, undersized framing that needs reinforcement, and chimney flashing that hasn’t been touched since the 1987 Narrows quake. We write those line items into the contract as allowances with specific numbers, and any change order gets priced and approved in writing. Call (743) 200-8347 for a free written estimate. You’ll know exactly what the job costs before a single nail is driven.
We Also Serve Cities Near Whittier
Our Whittier crews also cover Pico Rivera, South El Monte, Hacienda Heights, and Montebello. If you’re a homeowner in one of those cities looking for a Roofing Company that sends a badged, background-checked technician and puts every price in writing, give us a call. Whittier is our core service area, but we make the short trip to neighboring communities regularly.
Serving Whittier, CA - Our Local Coverage Area
We’re based in the Whittier 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 Whittier
Yes. Every roof inspection we do in Whittier on a pre-1990 home includes a check of roof-to-wall connections, chimney flashing, and ridge lines for signs of seismic stress from the 1987 Whittier Narrows earthquake. We look at rafter tails, top plates, and anchor points, not just the roof surface. If we find connections that were cosmetically patched but never reinforced, we photograph them and include the repair in your written estimate. Call (743) 200-8347 to schedule an inspection.
Santa Ana winds funnel through the Puente Hills corridor and hit north- and east-facing slopes with enough vacuum force to lift ridge caps right off their mortar beds. It happens within a few years when installers skip the foam adhesive bead under each cap. We bed every ridge cap in foam adhesive on Whittier hillside tile roofs, and we re-point rake tiles the same way. It costs a little more upfront and it’s the only fix that holds in this wind corridor.
Yes. We work steep-pitch hillside roofs above Colima Road regularly. Those jobs require fall protection, sometimes a crane, and a crew that knows how to stage materials on an irregular lot grade. We send a lead tech who’s done this specific work before. The estimate accounts for hillside access and equipment before work starts, so there’s no surprise line item mid-job.
Usually three things. Cracked or soft decking over skip-sheathing or first-generation plywood. Flashing that shifted during the 1987 Narrows quake and was caulked over instead of reflashed. And ridge cap mortar that’s cracked from years of Santa Ana wind. We price every one of these in writing before any work starts, and we show you photos of what we found.
We write the full scope, including decking replacement allowances and any seismic tie-in work, into the contract before we start. When we open the roof and find something outside that scope, we stop, photograph it, and get your written approval on the added cost before we touch it. You’re never handed an open-ended change order at the end. That’s the 365-Day Done Right Principle: a written price before every job, and a written guarantee on every repair. If a repair fails within a year, we come back and make it right at no charge. Call (743) 200-8347 to get your Whittier roof priced in writing.
Call Mercer Roofing in Whittier
When you call (743) 200-8347, a live person answers. Not a voicemail, not a callback form. Tell us what’s going on with your Whittier roof and we’ll schedule a free estimate. You’ll get your technician’s name and photo before the visit, a photo ID badge at the door, and a written price before any work starts. If you’d rather talk through your roof problem first, we’ll walk you through what we typically find in Whittier homes and what it costs to fix.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Whittier and surrounding San Gabriel Valley communities.