A roofing contractor in Walnut, CA spends most of its time on tile. Walnut grew later than the older San Gabriel Valley cities, and many of its homes, from the 1970s tracts to the larger houses built into the slopes of the San Jose Hills, carry concrete or clay tile rather than shingle. Steep driveways, terraced lots and second-story skylights add to the work.
We reach Walnut in about 35 minutes from our Rosemead Blvd base, roughly 17 miles east along the 60. The city had 28,430 residents in 2020, and it is home to Mt. San Antonio College. Our process here matches what we do for roofing in Rosemead: inspect, photograph, then quote in writing.
Concrete tile and hillside lots in the San Jose Hills
Walnut's housing is newer than most of the valley: largely 1970s through 2000s, much of it two-story, with concrete tile on tract homes and clay or concrete tile on custom houses higher up the hills. Tile is heavy and durable, but it hides problems. The underlayment beneath it wears out first, and leaks usually appear at valleys, hips, skylights and where a roof meets a wall.
Walnut sits on the southern slopes of the San Jose Hills, with the Puente Hills to the south, and Snow Creek and Lemon Creek drain south toward the San Jose Creek valley. That terrain gives many lots a ridge or canyon exposure the flat valley cities lack. The city incorporated on January 19, 1959, but most of its master-planned neighborhoods came later, so tile on battens dominates, and felt laid under that tile is often brittle after 20-plus years.
- Hillside wind: canyon-facing slopes catch Santa Ana and downslope gusts from October to March, which can slip or crack tile along ridges and rakes.
- Fire exposure: some parcels next to open hillside may fall in a mapped Fire Hazard Severity Zone. Check the CAL FIRE map for your address.
- Access: steep driveways and terraced yards change how tile is lifted, staged and removed.
How do we work on steep Walnut driveways and two-story tile roofs?
Before quoting, a roofer walks the roof on the tile laps where it bears weight, checks the attic, and looks at how materials can reach the roof on your lot. Afterward you receive the photo set and an itemized written quote, with permits, any deck replacement and any tile we expect to replace listed on their own lines. Most Walnut visits land same-day or next-day when crews are free.
Google reviewers describe clear explanations of options without pressure, which matters when the choice is between a section repair and a full underlayment job on a large tile roof.
Tile repairs, skylights and reroofs for Walnut homes
Leaks at valleys, ridges and flashing go to roof repair, often by lifting tile, replacing the underlayment beneath and relaying the same tile. When the underlayment has failed across the roof, a full roof replacement may mean reusing sound tile on new battens and underlayment, or moving to a new tile or a lighter material.
Skylights are a frequent leak source on two-story Walnut homes. Flashing a skylight into tile takes more detail than into shingle, and older units often have tired seals or cracked domes. Our skylight service covers resealing, reflashing and replacement.
Roofing services for Walnut, CA properties
Tile Roof Repair
Most Walnut homes carry concrete or clay tile, and cracked or slipped pieces at ridges, rakes and valleys are the most common repair on both tract houses and hillside customs.
Tile Underlayment Replacement
Tile here usually outlasts its underlayment, and felt laid under 1980s and 1990s tile is often brittle now, so it can be replaced while sound tile is cleaned and reused.
Skylights
Skylights on two-story Walnut homes are a frequent leak point, because flashing a curb into tile takes pans, crickets and careful lapping that a shingle roof never needs.
Roof Replacement
Full reroofs on hillside lots need access and staging planned around steep driveways and terraced yards, and switching from tile to a lighter material can bring in Title 24.
Wind Damage Roof Repair
Canyon-facing slopes along the San Jose Hills catch October-to-March Santa Ana gusts that crack and displace ridge and rake tile, and loose pieces become hazards in the next blow.
Roof Flashing Repair
Two-story Walnut homes have lower roofs meeting upper walls at many points, and failed step or counter flashing there causes leaks that look like tile problems from inside.
Roof Inspection
A tile roof hides its underlayment, so an inspection that lifts a few pieces at valleys and eaves tells a Walnut owner how many seasons the felt has left before a relay.
Valley Blvd, Mt. SAC and the 60: coverage and permits
We work throughout Walnut, from the neighborhoods near Mt. SAC and Grand Ave to the streets off Valley Blvd, Lemon Ave and Nogales St. Walnut is an incorporated city, so its building division issues reroof permits. Confirm the current rules with the city; we file the permit when the job needs one and arrange the inspection.
Mt. San Antonio College and its Hilmer Lodge Stadium sit along Grand Ave and Temple Ave, and the master-planned neighborhoods spread south and west from there toward Valley Blvd. Walnut borders West Covina, Covina, San Dimas, Pomona, Diamond Bar, Rowland Heights, City of Industry and La Puente, so we confirm the city line before filing anything. Homes range from about 1,800 to more than 11,000 square feet, and the larger custom houses on the ridges carry big, many-faceted tile roofs where staging can take as long as the repair.
Nearby, see our pages for Diamond Bar south of the 60 and West Covina on the other side of the hills.
Reviews from San Gabriel Valley customers
4.9★ from 48 Google reviews (checked Nov 2026)
“A recent strong wind loosened a shingle on my roof in Rosemead. It took just one call, and Tanner came out the very next day to help. While we talked, I mentioned how thankful I still am for the excellent roofing work the crew did years ago, which has continued to hold up very well. …”
“awesome roofing team that does solid work. i couldn’t be happier with how my new roof turned out. after the roof replacement was finished, there was a small issue related to the original roof design, not the installation, and david went above and beyond by coming out quickly with william to take care of it himself. …”
Roofing questions from Walnut
Does a Walnut tile roof have to meet Title 24 cool-roof rules?
Usually not. Title 24 exempts roofs weighing 25 lb/ft² or more, and most concrete and clay tile meets that weight. A switch to a lighter material, such as shingle or stone-coated steel, could bring the cool-roof rules into play on a reroof covering half the roof or more. The city has the final word, and we check with it before ordering.
Why does my skylight leak only in heavy rain?
Heavy or wind-driven rain overwhelms a weak point that light rain never reaches, often the head flashing above the skylight or the pan beneath tile on the uphill side. Debris trapped behind the curb also dams water. We lift the surrounding tile, inspect the flashing and seal, and tell you whether resealing or replacement is the better fix.
How much tile will break during a repair on my roof?
Some breakage is normal, especially on older concrete tile. We set aside sound tiles, plan for replacements that match the profile and color, and list the expected count on the quote. On discontinued profiles, we may borrow tiles from a hidden slope and put new ones there instead.
