Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterRoofers in Walnut, CA
Roofing work in Walnut runs $180 – $340 for common repairs and $12,000 – $28,000 for full replacements, with most jobs scheduled within a few days. Walnut’s planned-community housing stock, built mainly between 1965 and 1990, creates a distinctive second replacement cycle: many homes already converted from wood shake to concrete tile in the 1990s now need fresh underlayment and ridge work as those tile roofs age past 25 years. We’re Mercer Roofing, and our crews work Walnut from our Los Angeles dispatch office. Call (743) 200-8347 to schedule your free estimate.
Why Walnut Homes Are Different
Walnut sits in a tough spot, geographically. The city straddles the eastern San Gabriel Valley where summer temperatures crack 100°F regularly, and Santa Ana winds push through nearby passes with bone-dry air that bakes roofing materials from above while the marine layer settles overnight to add moisture from below. That heat-then-damp cycle chews through underlayment faster than coastal LA microclimates.
The fire code adds another layer. Much of Walnut’s residential area borders or sits within Los Angeles County’s Very High Fire Hazard Severity Zone because of the Puente Hills. That legally mandates Class A fire-rated roofing on affected properties. The city’s 1970s and 1980s upscale planned communities were originally roofed in premium wood shake, which was banned by fire code and forced a wave of conversions to concrete tile in the 1990s. Those same tile roofs are now 25 – 35 years old, and we’re seeing the underlayments fail right on schedule.
There’s a split-roof pattern we watch for in hillside tracts backing the Puente Hills. North-facing sections grow moss and algae from overnight marine-layer moisture, while south-facing sections on the same roof bleach and micro-crack from afternoon sun. One roof, two problems, and we plan for both.
Our Main Walnut Services
Most calls from Walnut fall into three categories: stopping an active leak, assessing a roof that’s reached its second lifecycle, or installing a new roof on a home that’s never been re-roofed.
Roof Repair in Walnut
Repair work in Walnut usually means tracking leaks to failed underlayment beneath tile, repointing crumbling ridge mortar, or replacing cracked tiles after Santa Ana wind events. We don’t do patch jobs that ignore what’s underneath. Every repair includes a written guarantee and a free second visit if the fix fails within 365 days. Roof Repair in Walnut
Roofing Company in Walnut
As a full-service roofing company in Walnut, we handle inspections, maintenance plans, and full replacements for homeowners, property managers, and HOAs. We work with concrete and clay tile, asphalt shingle, and low-slope systems. Every technician is background-checked, identity-verified, and arrives in a clean uniform with a photo ID badge, the Threshold Verified standard. Roofing Company in Walnut
Roof Installation in Walnut
New roof installation in Walnut often involves full tear-off of aging tile systems, replacing degraded underlayment, and installing current Class A fire-rated materials that meet LA County requirements for the Very High Fire Hazard Severity Zone. We use GAF, CertainTeed, Owens Corning, and other manufacturer-recognized brands. Every project starts with a written price before any work begins. Roof Installation in Walnut
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Walnut
We install and repair with GAF, CertainTeed, Owens Corning, and IKO shingles and systems, matching manufacturer specifications for warranty coverage. Our crews carry common tile profiles and underlayment stock for faster turnaround on Walnut repairs. See our brands for full details.
Pricing for Roofers in Walnut, CA
| Service | Typical range in Walnut |
|---|---|
| Tile roof leak repair (underlayment section) | $180 – $340 |
| Tile replacement (per tile, standard profile) | $25 – $45 |
| Ridge mortar repointing (linear foot) | $12 – $18 |
| Skylight reflash and seal | $350 – $550 |
| Chimney cricket and reflash | $800 – $1,400 |
| Partial underlayment replacement (tile roof) | $2,500 – $4,500 |
| Asphalt shingle roof replacement | $8,500 – $16,000 |
| Concrete tile roof replacement | $12,000 – $22,000 |
| Clay tile roof replacement | $16,000 – $28,000 |
| Roof inspection with written report | $150 – $250 |
Prices in Walnut run toward the higher end of these ranges when we need full underlayment tear-off beneath existing tile, or when hillside access requires specialized staging. We give you a written, line-item price before any work starts, and that price doesn’t change once we’re on the roof.
Neighborhoods We Serve in Walnut
We work across Walnut’s full residential footprint, from the older hillside tracts to the valley-floor planned communities. Most Walnut appointments are scheduled within two to three business days.
- Snow Creek
- Lemon Creek
- Vejar Ranch
- West Walnut
- San Jose Hills
Service Area – Cities Near Walnut
Our crews cover the eastern San Gabriel Valley and surrounding communities from our Los Angeles dispatch office. We regularly work in Rowland Heights, CA, Diamond Bar, CA, La Puente, CA, and West Covina, CA, with scheduling coordinated to minimize wait times across the service area.
Serving Walnut, CA - Our Local Coverage Area
We’re based in the Walnut 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 Roofers in Walnut
Yes. Roof replacement in Walnut requires a permit through the City of Walnut Building and Safety Division, and inspections at rough and final stages. We pull permits for every full replacement and schedule inspections so you don’t have to coordinate with the city. Call (743) 200-8347 and we’ll walk you through the timeline.
Most likely. Walnut’s planned communities, especially in Snow Creek and Vejar Ranch, have active HOAs with design guidelines that specify approved colors, profiles, and sometimes brands. We provide manufacturer samples and specification sheets as part of our written proposal to speed HOA approval. Call (743) 200-8347 to discuss your specific HOA requirements.
We typically schedule Walnut appointments within two to three business days for inspections and non-emergency repairs. A live person answers our phone 24/7 to book your visit and send you the name and photo of your technician before they arrive. Call (743) 200-8347 to schedule your free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local roofing pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Walnut Customers Say
"Full tear-off and new shingles on our two-story. They covered the landscaping with tarps and ran a magnet over the yard afterward. Didn't find a single nail."
- Karen V."Good roof repair. The crew was a day later than planned because of rain, which I understand, but the scheduling got moved twice. Work itself is clean and has held up."
- Dale T."Replaced the ridge cap and drip edge, and fixed a sagging gutter that nobody else mentioned. Fair price."
- Phil N.