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
If you’re searching for roof replacement in Monrovia, you’re likely dealing with one of three things: a roof at the end of its life after years of Santa Ana winds and blistering foothill sun, hidden decking rot discovered under multiple layers of old shingles, or a Craftsman that’s losing its original wood shingle character. A full replacement in Monrovia typically runs $12,500 to $28,000 for a standard asphalt shingle roof, depending on size, tear-off layers, and decking condition. Call Crestview Roofing Co Pasadena at (626) 389-1956 and we’ll give you a written price before any work starts. Not a ballpark. A line-item price.
Why Crestview Roofing Co Pasadena Is Monrovia’s Preferred Roof Replacement Company
Dylan Pace started this company knowing one thing: homeowners don’t get burned by bad roofing. They get burned by bad information. That’s why every Monrovia job starts with a written price, not a handshake estimate. We’ve replaced roofs on 1900s bungalows off Myrtle, 1960s ranch houses in the flatlands south of Foothill Blvd, and hillside customs in the Canyon Crest area. Same process every time. You know who’s coming, when they’ll arrive, what it costs, and you get photos before and after.
We’re part of the Relay Home Co. family, which means every job is governed by The Relay Visibility Guarantee. That’s not marketing copy. It means a live trackable arrival time, photo documentation, and a digital invoice sent by text. The number on the written quote is the number on the final invoice. If a covered repair fails within 365 days, we return and fix it at no charge. In writing. On every job.
Our Roof Replacement crews know Monrovia’s housing stock. They’ve stripped three-layer tear-offs on 1920s Craftsman homes and reroofed low-slope flat decks on mid-century ranches. That local experience matters, because what you can’t see before tear-off is usually where the real cost lives.
Styles & brands we work with
Asphalt Shingle Roof Replacement in Monrovia
Asphalt Shingle Roof Replacement in Monrovia is the most common full-roof job we do here, and for good reason. Asphalt shingles handle the foothill heat well when they’re installed correctly, and they’re the most cost-effective way to get a 25- to 50-year roof on a Monrovia home. If your roof is losing granules, curling at the edges, or showing bare spots after a Santa Ana event, you’re probably looking at replacement, not Roof Repair - Monrovia. A standard architectural shingle tear-off and replacement on a 1,600-square-foot Monrovia home runs $14,000 to $21,000. A larger two-story with steep pitches pushes higher.
Full Tear-Off vs. Overlay
Here’s the thing about Monrovia specifically: many homes have 2 to 3 layers of old composition shingles already. Building code allows a second layer in some cases, but a third never. We recommend tear-off in nearly every situation here. It exposes decking problems before they become structural, and it’s the only way to correctly install ice and water shield in valleys where Monrovia’s winter rains concentrate runoff.
Architectural vs. Three-Tab
Architectural shingles cost about 15 to 20 percent more than three-tab initially. In Monrovia’s thermal shock climate, hot dry summers followed by cold winter rain, the laminated construction of architectural shingles resists cracking better. For Craftsman homeowners trying to preserve a wood shingle look, a high-end dimensional shingle from CertainTeed or GAF gets surprisingly close. We coordinate with architects on these jobs regularly.
New Roof Installation in Monrovia
New Roof Installation in Monrovia means either a roof on a new construction project or a complete re-roof down to bare decking. That second meaning is more common here. When we do a new roof installation, we remove everything: shingles, underlayment, old flashing, sometimes decking. Then we build back up with new underlayment, new flashing, new ventilation, and new shingles or flat-roof membrane. On Monrovia hillside homes with low-slope sections, this often means mixing systems: asphalt shingles on the steep pitches and a modified bitumen or TPO membrane on the flat sections over patios or additions.
New Construction Roofing
For new construction in Monrovia, the roof is one of the first things to get inspected and one of the last things to get finished. We work directly with your architect and general contractor to make sure the roof detail matches the design intent and the building department’s requirements. Because there’s no old roof to tear off, pricing is more predictable: $18,000 to $32,000 depending on square footage, slope, and material selection.
When New Is the Only Option
Some Monrovia homes reach a point where patching doesn’t make financial sense anymore. If you’re seeing daylight in the attic, sagging between rafters, or shingle granules in your rain gutters after every storm, a new roof is less expensive than waiting for a leak to destroy ceilings and insulation. We’ll tell you straight if repair gets you another few years or if you’re throwing money at a roof that’s already done. Call (626) 389-1956 and we’ll come look.
Roof Decking Replacement in Monrovia
Roof decking replacement in Monrovia is the line item that surprises homeowners most, but it shouldn’t. Older Monrovia homes with multiple re-roofs almost always have some decking problems. Original 1×6 boards from a 1920s Craftsman were never meant to hold the weight of three shingle layers. And when those layers trapped moisture for decades, the decking rotted from underneath. We don’t know the full decking story until tear-off. What we do know is this: if your decking is compromised, the shingles above it can’t do their job, no matter how good they are. Budget $3 to $6 per square foot for decking replacement when needed.
Flat Roofing in Monrovia
Flat roofing in Monrovia shows up on more homes than people expect. Mid-century ranches off Duarte Road often have flat or low-slope sections over additions, garages, or breezeways. Those sections drain poorly when eucalyptus leaves pile up, and standing water accelerates membrane failure. We inspect flat sections separately from sloped sections, because the failure modes are completely different. A flat roof replacement on a typical Monrovia addition runs $8,000 to $14,000, depending on access and membrane type.
Trusted Brands We Service in Monrovia
We install and service roofing systems from GAF, CertainTeed, Owens Corning, and IKO. When we order materials for a Monrovia job, we specify them for the local conditions: high wind ratings for Santa Ana exposure, algae-resistant formulations for the shade and moisture pockets created by oak canopies, and impact ratings that satisfy foothill insurance requirements. Because we install these systems daily across Monrovia, we know which products hold up on a south-facing slope and which ones don’t. We don’t experiment on your roof.
See the difference
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After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Monrovia Homes
- Layered materials hiding decking rot. A 1920s Craftsman off Myrtle might have three layers of composition shingles over original 1×6 decking. The weight alone is a problem, but the trapped moisture is worse. Decking rot is invisible until tear-off, which is why we pre-inspect attics and roof cavities before quoting.
- Thermal shock cracking on south-facing slopes. Monrovia’s hot, dry summers bake asphalt shingles until they’re brittle. Then winter rain hits and the temperature swings cause micro-cracking. South-facing ranch home slopes fail first, and they almost always need replacement before the rest of the roof.
- Debris accumulation from oaks and eucalyptus. In foothill neighborhoods north of Foothill Blvd, overhanging trees drop leaves and bark that trap moisture against shingles. That moisture feeds moss, which lifts shingle edges and accelerates granule loss. We see valleys filled with organic debris that’s been there for years.
- Inadequate ventilation from multiple re-roofs. When a roof gets re-covered without adding ventilation, the attic overheats. That’s why so many Monrovia homes have cooked shingles from the underside. Proper ridge and soffit ventilation is part of every replacement we do, not an add-on.
Pricing for Roof Replacement in Monrovia, CA
Here’s what you should plan for in Monrovia’s market. A standard architectural asphalt shingle roof on a 1,500-square-foot single-story home runs $13,000 to $19,000 with full tear-off, new underlayment, new flashing, and new ventilation. Add $3.50 to $6 per square foot if decking replacement is needed, which is common on older Craftsmans. A high-end dimensional shingle system matching original wood-shake profiles on a foothill home runs $22,000 to $34,000. Flat roof sections add $8,000 to $14,000 depending on size and membrane. Every quote we give is written, line-item, and fixed before materials get ordered. The price on the page is the price on the invoice. Call (626) 389-1956 for your free estimate.
| Roof Replacement Scope | Typical Monrovia Price Range |
|---|---|
| Architectural shingle tear-off & replacement (1,500 sq ft) | $13,000 – $19,000 |
| High-end dimensional shingle (Craftsman match) | $22,000 – $34,000 |
| Decking replacement (per square foot) | $3.50 – $6.00 |
| Flat roof section replacement | $8,000 – $14,000 |
| New construction roof | $18,000 – $32,000 |
We Also Serve Cities Near Monrovia
Our crews cover the San Gabriel Valley foothills and beyond. If you’re in Roof Replacement in Monrovia territory, we’re already in your neighborhood weekly. We also serve Arcadia, Duarte, El Monte, and San Marino. Same written pricing, same visibility guarantee, same live arrival tracking. Call (626) 389-1956 and we’ll schedule a free estimate wherever you are.
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
Because Monrovia’s foothill neighborhoods north of Foothill Blvd sit directly under mature oak and eucalyptus canopies that flatland Pasadena homes don’t have. Those trees drop leaves, bark, and seed pods continuously through the year, and the debris traps moisture against shingles in shaded areas. That moisture feeds moss, which lifts shingle edges and accelerates granule loss. We recommend cleaning valleys and roof surfaces twice a year in Monrovia’s foothill zones, which is frequency you don’t need in flatter, tree-sparse parts of Arcadia or Pasadena. Call (626) 389-1956 if you want us to assess your specific tree exposure.
It creates thermal shock, and thermal shock is what cracks brittle asphalt shingles. Summer sun bakes the shingles to 140-plus degrees on a south-facing slope. Then winter rain drops the surface temperature by 60 to 80 degrees in minutes. That rapid contraction causes micro-fractures along the shingle edges. Over several seasons, those fractures widen until water gets through. Monrovia’s thermal cycle is the reason we spec shingles with higher thermal stability ratings and why we replace south-facing slopes earlier than north-facing ones.
Because your 1920s Craftsman in Monrovia almost certainly already has multiple layers of old shingles, and a third layer violates code. More importantly, the original 1×6 decking underneath wasn’t designed for the weight of two or three shingle systems. A tear-off lets us inspect and repair that decking, replace deteriorated flashing around chimneys and valleys, and install proper ice and water shield where Monrovia’s winter rains concentrate. An overlay hides those problems. A tear-off fixes them. For a Craftsman roof, that’s the only way we’ll do it.
On high-end Monrovia projects, the roof itself is rarely the bottleneck. Lead times on specialty millwork drive the schedule. If your Craftsman needs replacement fascia, soffit, or decorative rafter tails milled to match the original profile, that material often takes 3 to 6 weeks from order to delivery. Custom copper flashing for valleys or chimney cricket details adds more time. We order those items immediately after your written quote is approved, and we lock the full project price in writing before anything gets ordered. The labor crew is ready when the materials land.
Line by line. Put each quote’s scope side by side: tear-off, decking replacement contingency, underlayment type, shingle brand and model, flashing details, ventilation count, and disposal fees. If a Monrovia quote omits decking replacement or valley ice and water shield, it’s cheaper for a reason, and that reason will surface as a change order during the job. We write every quote as a fixed, line-item price before any work starts. No change orders, no door-side revisions. Call (626) 389-1956 and we’ll walk you through what to look for in any competitor’s bid, including ours.
Call Crestview Roofing Co Pasadena for Your Monrovia Roof Replacement
You’ll get a written price before any work starts. You’ll know who’s coming, when they arrive, and what the job costs. You’ll get before-and-after photos and a digital invoice by text. And every repair carries the 365-Day Done Right Promise, in writing. No exceptions. Call (626) 389-1956 to schedule your free estimate today.
Written by Dylan Pace, Owner at Crestview Roofing Co Pasadena, serving Monrovia since 2000.