Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Claremont
Roof replacement in Claremont generally runs $11,500 – $28,000 for a typical single-family home, with flat roofs and acreage outbuildings landing at the lower end and large Craftsman or custom homes at the upper end. Most Claremont tear-offs take five to nine working days once materials arrive, though acreage properties with detached shops or ADUs add time for scoping and staging. If you’re weighing a replacement against another repair season, call us at (866) 850-2496 and we’ll walk you through what your specific roof actually needs. We work throughout the 91711 zip code, from the Claremont Village up to the foothill acreage north of Foothill Boulevard.
Claremont roofs don’t fail on a schedule. They fail on shade, leaf litter, Santa Ana wind, and age. A roof that looks tired from the curb may be fine for another five years, and a roof that looks serviceable may have decking turning soft under a shaded valley. That’s why we start every Claremont replacement with a roof inspection, not a sales pitch. You see what we see before you sign anything.
Why Windmill Roof Repair Is Claremont’s Preferred Roof Replacement Company
We’re material-agnostic, which matters more in Claremont than it does almost anywhere else in the San Gabriel Valley. The city’s older housing stock runs from Craftsman wood-shake to Spanish tile to mid-century composition, and the right roof for a 1920s bungalow off Indian Hill Boulevard is not the right roof for a 1960s ranch up toward Padua Avenue. Because we work across seven brands – GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral – the recommendation comes from your roof’s actual condition, your home’s architecture, and your budget. Not from some preferred-vendor arrangement with a single manufacturer. Seven brands, one crew. The right material for your roof, not ours.
Ruben Ochoa has built the company around a plain principle: repair when you can, replace when you must. If a targeted repair buys you more seasons, that’s what we recommend. And we offer standalone roof inspections any Claremont homeowner can book without agreeing to any work, which is where most of our replacement jobs start. Homeowners come to us with a leak or a listing inspection and leave with an objective picture of a roof they can act on now or plan for later. That’s how we’ve earned our local reputation from the Village to the foothills.
Styles & brands we work with
Flat Roof Replacement in Claremont
Flat roof replacement in Claremont runs $9,500 – $19,500 for a typical residential or detached structure, and the work matters on everything from mid-century low-slope ranch roofs to detached shops and ADUs on acreage lots. A flat roof fails differently than a pitched one. Standing water, failed seams at penetrations, and dried-out membrane around scuppers and drains are the usual culprits, which means the scope has to be written for the roof’s actual slope and drainage, not guessed from the ground. Claremont’s seasonal swings from 100-degree summer days to winter rain put real stress on membrane seams, especially on roofs that get no afternoon shade.
Low-slope and membrane work on older ranches
Many Claremont ranch homes built in the 1950s and 1960s carry low-slope roofs that were originally torch-down or built-up asphalt. By now, those membranes are past service life. A proper replacement means pulling the old layers, checking the sheathing beneath, and laying a modern modified bitumen or TPO system with new edge flashing and corrected drainage. If the sheathing is sound, the job can move quickly. If it has been holding water at the low points, the price changes. We’d rather find that before quoting than hand you a change order mid-tear.
Detached shops, garages, and ADUs
On Claremont acreage lots, the flat-roofed detached shop or garage often carries the original membrane from decades ago, and it gets neglected because nobody lives in it. The roof leaks, the decking softens, and the homeowner discovers it when a stack of boxes gets ruined. We scope these structures to their own conditions, not the main house’s. Thinner sheathing, improvised pipe penetrations, and poor edge detailing all change the number. We can usually drop these into the same mobilization as the main house replacement, which saves you time and hauling cost.
Roof Installation in Claremont
Roof installation in Claremont for new construction or a full tear-off with standard architectural shingles runs $12,000 – $26,000 on most single-family homes, with flat and low-slope installs starting lower and larger or steeper roofs running higher. We handle everything from a full tear-off and re-deck on an existing home to new-construction installs on additions and detached structures. The phrase “roof installation” covers two very different animals in Claremont. There’s replacement, where we strip the old roof down to the deck and build back up correctly. And there’s true new construction, where we’re installing the first roof a structure has ever had. Both matter on Claremont lots where detached shops, garages, and new ADUs are going up.
New construction and additions
When a Claremont homeowner builds a detached ADU or replaces a failing shop roof as part of a larger project, the roofing scope needs to be written before the structure is closed in. Ventilation, decking thickness, and eave detailing have to be decided at framing, not after. We work with the general contractor or directly with the homeowner to get that right. On a recent Padua Avenue property, we installed the first roof on a new detached structure and matched the main house’s shingle profile so the two buildings read as one property, not an afterthought.
Full tear-off and re-deck
A full tear-off in Claremont means the old roof comes off to the deck. That’s when we can actually see the decking and replace any section the old roof was hiding. On older Claremont homes, especially those under tree canopy, a deck that looks fine from the attic can be spongy at the edges where valleys held moisture. Skip-sheathing from the pre-plywood era is common on homes built before 1950, and modern shingles don’t install correctly over it. We re-deck to current code when the conditions call for it and show you the evidence before any of that extra lumber goes down.
Trusted Brands We Service in Claremont
We install and service GAF, CertainTeed, TAMKO, and other leading shingle brands, and we carry the local components Claremont roofs depend on: valley metal, drip edge, ice and water shield, ridge vent, and the flashing profiles that match the older eave and fascia details on Village homes. If you have an existing warranty through a specific manufacturer, we’ll spec the replacement to keep that intact where possible. If you don’t know what you have, the inspection pins it down. Claremont homeowners get genuine product choice, with no brand pushed because it happens to be what we stock a discount on. The roof’s needs and your budget decide.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Claremont Homes
- Decking rotted under shaded valleys. The mature canopy that gives Claremont its “City of Trees” name drops leaf litter into valleys and gutters, where it holds moisture against the decking for months at a time. By the time a roof is torn off, the decking under those valleys is often soft and needs replacement, which is why we inspect the deck before quoting.
- Wood-shake and skip-sheathing on pre-1950 homes. Original Craftsman and early Spanish Colonial roofs were frequently built with skip-sheathing and wood-shake or shingle, not plywood and asphalt. Modern shingles need solid decking, so a replacement on these homes almost always includes re-decking as part of the real scope.
- Detached structures with underbuilt roofs. Claremont’s acreage properties often include a detached shop, garage, or ADU whose roof was built lighter than the main house’s. Thinner sheathing, improvised flashing at vent pipes, and old three-tab over skip-sheathing are common, and a scope written for the house doesn’t cover the outbuildings.
- Santa Ana wind damage at eaves and hips. The hot dry winds that push through the San Gabriel foothills loosen shingles and expose flashing at eaves and hips, especially on homes where the original nailing pattern was too high. A replacement is the right time to correct the nailing spec and fasten everything for the next wind event.
Pricing for Roof Replacement in Claremont, CA
A typical asphalt shingle roof replacement in Claremont runs $12,000 – $24,000. Flat roof replacement on a house or detached structure runs $9,500 – $19,500. Re-decking, when needed, runs $2.50 – $5.00 per square foot of deck area, and on older Claremont homes under heavy tree canopy, partial re-decking is common enough that we inspect the deck and include realistic allowances in the quote rather than surprising you later. Material choice shifts the number. CertainTeed and Boral architectural lines cost more than entry-level GAF or TAMKO, and the difference is sometimes worth it on a house with long eave lines and visible roof planes. Claremont acreage lots with detached structures cost more simply because there’s more roof to scope. Call (866) 850-2496 for a free estimate, and we’ll give you a written line-item quote before any work starts.
We Also Serve Cities Near Claremont
Our crews run Roof Replacement jobs throughout the eastern San Gabriel Valley and the Inland Empire foothills. If you’re in Montclair, La Verne, Upland, or Pomona, you’re in our regular service area, and the same team that works Claremont will run your job with the same material-agnostic approach. Call the same number, get the same inspection-first process, and the same honest scoping whether you’re on a city lot or an acreage parcel.
Serving Claremont, CA — Our Local Coverage Area
We’re based in the Claremont 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 Replacement in Claremont
Some Claremont acreage lots sit in unincorporated LA County pockets, which means a roof replacement can trigger county permitting and inspection rather than city, depending on the parcel’s jurisdiction. We confirm who has authority over your parcel before quoting so the permit path is settled and the job doesn’t stall mid-square on a jurisdiction surprise. Call (866) 850-2496 and we’ll check your address.
On Claremont acreage properties, the wellhead and septic leach field setbacks dictate where a dumpster can sit and where ladders can be staged. One county rule about encroaching on a leach field changes the tear-off sequence and haul path, sometimes adding a day of labor. We scope those setbacks before we write the quote so the price and schedule reflect the actual lot, not an assumption of a clear city side yard.
Yes. We scope detached shops, garages, and ADUs as their own structures with their own conditions, and we can usually run them in the same mobilization as the main house replacement, which saves you a separate haul and setup charge. The outbuilding quote is written to the outbuilding’s actual decking and flashing, not copied from the house.
Claremont’s mature tree canopy drops leaves and debris into roof valleys and gutters, and the shaded north slopes hold moisture long after the sun comes back. What that means at tear-off is predictable: soft decking at the valleys, staining at the eaves, and flashing that has been wet more than it has been dry. It also means the replacement deck inspection is not optional. The trees are the reason a Claremont roof that looks worn from the street can hide real decking rot underneath.
A Claremont roof replacement should meet the manufacturer’s high-wind installation spec, with a six-nail pattern on shingles and proper starter and hip and ridge fastening, rather than the standard four-nail pattern many roofs were originally built with. Santa Ana wind gusts through the San Gabriel foothills can hit 60 mph or more, and the difference between a roof that weathers the event and one that loses shingles is often just the nailing pattern and edge detailing. We write that spec into every Claremont replacement quote by default.
Call (866) 850-2496 and we’ll get you a free inspection and a line-item replacement quote. On a Claremont acreage lot, we’ll walk the well and septic setbacks with you, check the decking on the house and the shop, and tell you what the roof actually needs. Repair when you can, replace when you must. See it before you sign anything.
Written by Ruben Ochoa, Owner at Windmill Roof Repair, serving Claremont and the eastern San Gabriel Valley.