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 Monrovia
Roof replacement in Monrovia typically runs $14,000 – $28,000 for a standard asphalt shingle tear-off on a 1,500 – 2,200 sq ft home, with steeper hillside properties and tile work landing higher. Most jobs we scope in the 91016 and 91017 zip codes take three to five working days once materials are on site, though permit routing through either the City or LA County building department adds a few days up front. We’re Ridge Cap Roof Repair, led by Noel Cardenas, and we work across Monrovia’s flatland and foothill streets with the same crew that inspects your roof doing the replacement. Call (866) 361-0798 for a free estimate and we’ll walk your roof before we ever talk square footage.
Why Ridge Cap Roof Repair Is Monrovia’s Preferred Roof Replacement Company
Monrovia roofing is not one thing. A 1920s Craftsman near Old Town needs a different hand than a 1970s hillside build off Canyon Boulevard, and a tech who only reads age will miss what matters: which slope gets cooked by the sun and which slope gets torn by canyon wind. Our crew works the whole city, from the flat 91016 blocks west of Myrtle to the steep grades above Foothill Boulevard, and that range shows in how we scope work.
We inspect before we recommend. That’s the Ridge Cap rule. When a Monrovia homeowner calls us out for what they think is a full replacement, we often find a repair that buys real years – and when the decking tells us replacement is the honest call, we say so plainly. The same crew that does the inspection does the work, so the notes from the roof don’t get lost between an estimator and a sub crew. Seven manufacturers, one crew. From the ridge cap down.
Our service area covers all of Monrovia and the surrounding foothill communities. When you call, you get Noel’s time, not a call center. We show up, get on the roof, and tell you what’s actually happening.
Styles & brands we work with
Asphalt Shingle Roof Replacement in Monrovia
Asphalt shingle roof replacement in Monrovia is the most common job we do – it fits the housing stock, the budget range, and the sun load. The dry inland heat between May and October bakes south-facing slopes to a brittle crisp. A 20-year architectural shingle on a south slope in Monrovia often fails by year 14 or 15, while the north side still looks nearly new. That uneven wear is why we read slope and aspect before we quote, not just the roof’s total age.
A standard tear-off and re-shingle here runs $9,500 to $19,000 depending on squares, pitch, and decking condition. Homes in the hills run higher – steep pitch means staging, and staging costs labor. But we start every asphalt replacement the same way: strip to decking, inspect what’s under the shingles, and replace what needs replacing before a single new course goes down.
Architectural Shingle Upgrades
Most Monrovia homes move from old three-tab to architectural shingles. Owens Corning and IKO both make solid architectural lines we install regularly. The upgrade isn’t just looks – the thicker mat holds up better against wind-driven grit off the San Gabriels.
Decking and Underlayment
On south-facing slopes, we frequently find decking rot where attic ventilation was never adequate. The shingles baked, the heat transferred down, and the plywood lost its resin. We replace rotted sheets and upgrade underlayment to high-wind spec on foothill properties where Santa Ana gusts lift weaker materials.
New Roof Installation in Monrovia
New roof installation in Monrovia is a different animal than replacement, and we treat it that way. When a teardown or a f
Cost for new construction roofing here starts around $12,000 for a modest composition roof and climbs past $30,000 for larger custom homes with tile or steep-slope architectural profiles. We scope access first: can the boom truck reach the lot, where does the dumpster sit, how does material get walked up if the street is tight? That access planning is where cheap quotes fall apart on Monrovia hillsides.
New Construction and Steep-Slope Scoping
On new builds in the foothill edge of town, we walk the (pre-sheet) framing with the builder before decking goes down. That lets us catch the details that cause callbacks: valley angles too tight for water flow, soffit framing that chokes venting, and underlayment specs that won’t hold under canyon wind.
Flat Roofing
Some mid-century Monrovia homes and nearly all garage and addition roofs are flat or low-slope. These need membrane systems – TPO or modified bitumen – and can’t hold shingles. A flat roof on a modest garage might run $6,500 to $11,000. On a mid-century house, you’re looking at $14,000 to $22,000 with proper taper and insulation. Same crew, same scrutiny.
Trusted Brands We Service in Monrovia
We’re not tied to one manufacturer’s line. Ridge Cap Roof Repair installs and services GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That means when we recommend a shingle or tile for your Monrovia roof, the recommendation comes from the roof’s pitch, the slope’s sun exposure, and your budget – not from what we happen to stock. We keep Owens Corning and IKO architectural lines available for fast turnaround on Monrovia replacements, and we can spec Atlas or Tamko when a homeowner wants a different warranty profile. Seven manufacturers. One crew. The right material for your roof, not the right material for our inventory.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Monrovia Homes
- Decking rot on sun-baked southern slopes. Poor attic ventilation plus relentless UV cooks shingles from above while trapping heat below. By the time the shingles show damage, the plywood underneath is often soft in patches, and whole sheets need replaced.
- Wind-lifted shingles and torn underlayment near the foothills. Santa Ana events funnel through the canyons off the San Gabriels and hit the north edge of Monrovia hard. Shingle tabs that were never fastened to high-wind spec lift, then the underlayment gets exposed and shredded before we ever see it.
- Corroded flashing on older Craftsman and Spanish homes near Old Town. Original galvanized flashing from the 1920s through 1940s has given up. Water gets in at chimneys and penetrations during winter storms, and the rot hides behind fascia until the leak shows on a ceiling.
- Hillside tile underlayment failure. Steep-slope homes with original tile often have 40-year-old felt under the tile. The felt fails long before the tile does, and water travels down the roof deck to rot soffits and top plates. The fix is a full lift, re-underlayment, and re-set – which is a replacement, not a repair.
Pricing for Roof Replacement in Monrovia, CA
You should know the numbers before you call. A standard asphalt shingle tear-off on a 1,200 – 1,800 sq ft ranch in Monrovia runs $10,500 – $16,000. A hillside home with steep pitch, staging, and decking replacement runs $16,000 – $28,000. Tile re-roofs, depending on tile reuse, run $20,000 – $38,000. Flat and low-slope work on garages and additions runs $6,500 – $11,000. The things that move your number: permit routing (city vs county), decking condition, slope, access for staging, and whether existing flashing can be reused. We don’t pad change orders, but a roof is only honest when you’ve seen what’s under the shingles. Call (866) 361-0798 and we’ll quote from the roof, not from a satellite image.
We Also Serve Cities Near Monrovia
Our crews run the foothill corridor from Mayflower Village and Duarte up through Bradbury and Arcadia. If you’re in one of those neighboring towns and your roof is aging, the same team that works Monrovia handles your inspection and replacement. One crew, no hand-offs, same material-agnostic approach. Call (866) 361-0798 and tell us which street you’re on.
Serving Monrovia, CA — Our Local Coverage Area
We’re based in the Monrovia 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 Monrovia
It depends on your address. Flatland Monrovia addresses in 91016 pull building permits through the City of Monrovia. Hillside homes in the northern part of town fall under LA County building department jurisdiction, even when the mailing address is Monrovia. The county route adds plan-check time, usually a few extra days to a week or more depending on backlog. We handle the permit routing and know which counter to walk based on the address. Call (866) 361-0798 and we’ll confirm which jurisdiction applies before we quote.
The south slope takes direct inland sun all day, every day, for months on end. That UV load dries out the asphalt, and the shingles shrink, curl, and crack years before the shaded north slope shows any wear. It’s one of the most common patterns we see on Monrovia roofs, and it means you can’t judge the roof’s condition from the street – you have to walk both exposures. The good news is a replacement addresses the whole roof, and we often upgrade ventilation on the south slope at the same time to slow the next cycle of damage.
Santa Ana winds follow the canyons off the San Gabriels and hit the northern edge of Monrovia with gusts that lift shingles and fire debris down the slope. During a replacement, we fasten the starter strip, drip edge, and field shingles to high-wind spec, and we upgrade underlayment so a torn shingle doesn’t expose the roof to water. If your home is above Foothill Boulevard and you’ve already lost shingles, call (866) 361-0798 to get an estimate while the damage is still clear.
A square is 100 square feet of roof surface. Most Monrovia roofs run 15 to 25 squares, and material prices scale per square. But two homes with the same square count can quote differently if one has a steep slope, multiple valleys, or an awkward equipment access route. We quote from the actual roof, not from a satellite measurement, so the square count we give you is the square count we build to. No re-measure surprises mid-job.
Usually yes. We work with seven manufacturer lines, which gives us access to matching profiles and colors across more of the market than a single-brand contractor. If the exact original product is discontinued, we’ll spec the closest current match and show you a sample on the roof before we commit. Good matching matters on Monrovia’s hillside homes because a mismatched patch is visible from the street below. Call (866) 361-0798 for a free estimate and we’ll bring samples.
Written by Noel Cardenas, Owner at Ridge Cap Roof Repair, serving Monrovia and the San Gabriel foothills.