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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
CertainTeed Roofing in Monrovia, CA | Van Nuys Roofing Co
We provide independent CertainTeed roofing service across Monrovia – full replacements, architectural shingle work, and flashing repair – without being tied to a manufacturer program. What makes our CertainTeed work different here is that we understand how Monrovia’s wildland-urban interface, Santa Ana wind exposure, and aging foothill shake roofs change the way a CertainTeed system should be specified and installed. Call (866) 321-6172 for a free estimate from a crew that works these foothill streets every week.
Why Monrovia Residents Choose Us for CertainTeed Service
We’re not an authorized CertainTeed dealer, and that’s the point. We sell the CertainTeed system that fits the roof, the fire exposure, and the budget – not the one a manufacturer program pushes. Our crews work CertainTeed Landmark architectural shingles, Presidential luxury lines, and Flintlastic low-slope membranes regularly across the foothill neighborhoods below the San Gabriels and in nearby Bradbury, so we know the installation requirements and failure modes of each product line by heart.
Rick Dominguez, our owner, grew up a few blocks off Sepulveda Boulevard and learned the trade through the construction technology program at Los Angeles Valley College before spending two decades on rooftops across the San Fernando Valley. That background shows in how we approach every Monrovia job: inspect first, recommend second. If it doesn’t need replacing, we’re not going to tell you it does.
Styles & brands we work with






Common CertainTeed Roofing Problems We Solve in Monrovia
- Santa Ana wind uplift on Landmark fields and ridge caps. The canyon gusts that funnel through Monrovia hit west- and north-facing slopes hardest. We find lifted shingle edges, broken seal strips, and ridge caps that have started to peel. The fix is usually targeted re-sealing and cap replacement with genuine CertainTeed material – not a full re-roof unless the damage warrants it.
- Sun-baked, brittle shingles in the historic core. Monrovia’s hot, dry summers cook older asphalt roofs until the shingles lose granules and crack. When we tear off those roofs, the deck underneath is often fragile or skip-sheathed. We tell you up front if re-decking is part of the job rather than selling an overlay that won’t hold.
- Ember and debris impact under the wildland slopes. Off Hillcrest and Norumbega, we see wood-shake and older shingle roofs that have taken decades of ember hits and branch impacts. Those repairs often push homeowners toward Class A fire-rated CertainTeed systems, and that’s a replacement conversation we have honestly.
- Winter-rain flashing and valley failures on patched roofs. Monrovia’s heavy winter rains test every valley and flashing detail. On roofs that have been patched for decades, we often find compromised underlayment and step flashing under the patches. Genuine CertainTeed valley metal and WinterGuard underlayment fix the leak properly.
- Vent boot and plumbing stack failures. These are the quiet leaks that rot decking before anyone notices. We replace them with correct CertainTeed-compatible flashing while we’re on the roof for any other repair.
CertainTeed Service in Monrovia: What Local Conditions Mean for Your Roof
Monrovia’s foothill streets sit in the wildland-urban interface directly under steep, fire-prone San Gabriel slopes. That changes the way a roofing project works. Replacing an old wood-shake roof with a CertainTeed fire-rated system here often triggers a brush-clearance inspection that roofers working flatland cities like Arcadia or Duarte never encounter. The city wants to see defensible space around the structure before the roof work gets signed off, and that process adds time and coordination to the job. We walk Monrovia homeowners through it – we’ve done it enough times off Norumbega and Hillcrest that we can tell you exactly what the inspector will look for and how to prepare. The roof itself matters too: Santa Ana winds out of the northeast hit the canyon-facing slopes with uplift forces that flatland roofs never see, so we spec CertainTeed Landmark or Presidential with attention to nail pattern, seal strip engagement, and ridge cap fastening that goes beyond the basic installation guide. In Monrovia, a CertainTeed roof isn’t just a shingle job – it’s a fire-safety and wind-uplift calculation.
Off Norumbega we tore off a decades-patched original wood-shake roof and found soft, skip-sheathed decking underneath. We re-decked the roof, installed CertainTeed Landmark architectural shingles with WinterGuard in the valleys and ember-resistant vents, and walked the homeowner through the brush-clearance inspection that the hillside location required before the job was signed off. That’s the job we do in Monrovia.
CertainTeed Models & Products We Service in Monrovia
Our crews work the full CertainTeed product range that matters in Monrovia: Landmark and Landmark Pro architectural shingles for most re-roofs, Presidential Shake and Presidential TL for homeowners who want a luxury look with real wind performance, and Flintlastic SA self-adhered modified bitumen membrane for the low-slope sections and porch roofs common on some foothill homes. We also install the Integrity Roof System components – RoofRunner underlayment, DiamondDeck, WinterGuard, and Shadow Ridge cap shingles – when a Class A assembly is required.
For parts, we source genuine CertainTeed shingles, underlayment, and Flintlastic membrane so any repair stays within a rated system. We stock common Landmark colors and standard flashing profiles for fast Monrovia turnaround. If your color is discontinued, we’ll tell you and match the closest available blend rather than promising an invisible patch that won’t deliver.
See the difference
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AfterCertainTeed Service Pricing in Monrovia
CertainTeed roofing costs in Monrovia depend on what’s actually on the roof. A targeted flashing or valley repair typically runs $350 to $900. A full Landmark tear-off and replacement on a standard Monrovia home broadly falls between $9,500 and $14,500, with Presidential lines running higher. Flintlastic low-slope work and re-decking add to the total. Every free estimate we give is line-item specific – roof dimensions, deck condition, underlayment choice, and the CertainTeed product line are all accounted for before you see a number. Call (866) 321-6172 to schedule yours; you’ll know the real cost before you commit to anything.
Serving Monrovia, CA — Our Local Coverage Area
We’re based in the Monrovia area and know this community well, with Mayflower Village also in our service area. Use the map below to see our full coverage — if you’re nearby, we can almost certainly help.
FAQs – CertainTeed Roofing in Monrovia
Yes, in most foothill neighborhoods a re-roof that touches wildland-interface properties requires a brush-clearance inspection before the city signs off. We’ve managed this process on jobs off Norumbega and Hillcrest and can tell you exactly what the inspector looks for. Call (866) 321-6172 and we’ll explain what your specific property will need.
We rarely recommend it. Most Monrovia shake roofs have soft or skip-sheathed decking underneath, and a Class A assembly needs a solid, code-compliant deck to perform. We’ll inspect and tell you honestly whether a tear-off and re-deck is required. A free estimate at (866) 321-6172 gets you the answer.
Santa Ana gusts out of the northeast put real uplift stress on west- and north-facing slopes in Monrovia. We see lifted edges and broken seal strips concentrated there. Proper nail pattern, seal engagement, and ridge cap fastening matter more on those slopes than the basic guide suggests, and that’s how we install. If your shingles are lifting, call (866) 321-6172 – the repair is usually targeted and fast.
We’ll match the color if the CertainTeed line is still in production. If it’s discontinued, we’ll tell you up front and propose the closest available blend rather than promising an invisible patch. Call (866) 321-6172 with your shingle details and we can usually identify the color from photos.
Yes. We use Flintlastic SA self-adhered modified bitumen membrane for low-slope sections, porches, and dormers. It’s the right CertainTeed product for those areas, and it integrates with the shingle field properly when installed as a rated system. Call (866) 321-6172 for an estimate that covers every slope on your roof.
Service Areas Near Monrovia
Beyond Monrovia, our CertainTeed crews cover nearby foothill and valley communities including Van Nuys, Valley Glen, and Sherman Oaks. We also regularly work CertainTeed service in West Whittier-Los Nietos and provide CertainTeed service in Carson for homeowners along that corridor. For the full list of cities we serve, see our Monrovia service area page. If you’re outside the immediate Monrovia footprint, we can still usually help – call and ask. And for everything about our broader CertainTeed work, visit our CertainTeed sales & service page.
Book Your CertainTeed Service in Monrovia Today
We inspect first, recommend second, and give you a line-item estimate before any work starts. Seven leading brands, one crew that knows them all – and in Monrovia, we know how the foothills change the job. Call (866) 321-6172 to schedule your free CertainTeed estimate.
Written by Rick Dominguez, Owner at Van Nuys Roofing Co, serving Monrovia and the San Gabriel foothills.