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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Irwindale
Roof replacement in Irwindale usually means one of two jobs: tearing off an aging composition shingle roof on a mid-century stucco home, or rebuilding a flat or low-slope roof on one of the city’s many warehouse and light industrial buildings. Most residential replacements here land between $9,500 and $18,000 depending on decking condition, roof pitch, and shingle grade. The flat commercial and industrial membrane work typically runs $7 to $12 per square foot when full tear-off is included. If you’re weighing a roof decision in the 91722 zip code, call Hollywood Roofing Co at (833) 589-7971 for a written line-item estimate. We won’t pressure you.
Hollywood Roofing Co has been inspecting, repairing, and replacing roofs across the San Gabriel Valley for years, and we know Irwindale’s housing stock and wind patterns well enough to spec the right roof the first time. Roof Replacement is not a sideline for us. It’s a third of what we do, and we install all seven major shingle brands so the recommendation is matched to your home, not to a supplier contract.
Key Takeaways for Irwindale Homeowners
- Santa Ana wind exposure in the dam basin gap means wind-rated architectural shingles and a tighter fastener pattern matter more in Irwindale than in foothill neighborhoods to the north.
- Mid-century skip-sheathing under original composition shingles frequently needs repair or re-sheeting before new underlayment goes down, and that work should be priced in writing before it starts.
- Flat and low-slope roofs on Irwindale’s industrial buildings face a different failure mode: ballast loss and drain clogging from windblown dam-basin dust and grit.
- Estimates are free, and we write allowances into the contract so decking and flashing surprises don’t ambush you mid-project.
Why Hollywood Roofing Co Is Irwindale’s Preferred Roof Replacement Company
Roland Vega leads our crews, and the way he runs a roof replacement is simple: open it up, show you what we find, price it in writing, and only then move forward. Irwindale homeowners tend to be practical people. Many have owned the same house for twenty or thirty years. They don’t need a sales pitch. They need a straight answer about whether the decking will hold new fasteners and what the wind will do to whatever we put on top.
We work across Irwindale’s 91722 zip code regularly, from the older residential streets off Arrow Highway and Live Oak Avenue to the industrial and commercial parcels along the 605 corridor. Response time from our Hollywood headquarters to Irwindale typically runs under an hour for inspections and estimates. For full replacements we schedule based on material lead time and weather, never on contractor convenience. Local reviews from Irwindale customers consistently mention the same things: we showed up when we said we would, we explained the decking condition before we asked for a signature, and the final invoice matched the written allowance. That’s the standard, not a selling point.
Styles & brands we work with






Flat Roof Replacement in Irwindale
Flat Roof Replacement in Irwindale is a distinct job from residential shingle work because so much of the city’s building stock is low-slope membrane on warehouse, commercial, and some older residential additions. A full tear-off and replacement on a built-up or modified-bitumen roof in Irwindale runs $7 to $12 per square foot, and the work involves removing the old membrane, inspecting and often re-sheeting the deck, installing new underlayment and membrane, and addressing drainage at every low point. On gravel-ballasted roofs, the ballast itself is a job: it has to be removed, the membrane checked for wind scour, and the new system either re-ballasted or replaced with a fully adhered membrane that won’t shift in the Santa Ana gusts that funnel through the dam basin gap.
The Drain Problem Nobody Schedules For
Irwindale’s flat roofs collect blowing dust and grit from the Santa Fe Dam basin and the gravel pits. We routinely open up scuppers and secondary drains that are half silted over after a dry summer. On every flat replacement we spec new edge metal and drain assemblies rather than reusing what’s there, because the abrasive dust has usually pitted the metal enough to compromise the seal.
Wind Scour on Ballasted Systems
The older industrial roofs we replace often show the same pattern: ballast rock shifted away from the upwind corners and membrane flapping at the parapet. That’s wind scour, and it’s worse along Arrow Highway and the 605 corridor than in the foothill cities to the north. When we replace a ballasted roof, we talk through the tradeoff: re-ballast for cost, or fully adhere for wind performance. The answer depends on the building, and we’ll tell you which way the math points.
Roof Installation in Irwindale
Roof Installation in Irwindale on a residential property usually means a full tear-off and re-shingle on a 1950s-to-1970s single-story stucco home with a low-pitch or shallow gable roof. A standard architectural shingle replacement across a 1,200 to 1,800 square foot ranch home in the 91722 zip code typically runs $9,500 to $15,000. Upgrading to a higher-wind-rated architectural shingle from GAF, CertainTeed, or Tamko adds roughly ten to fifteen percent to the material line, and in this city the upgrade is worth serious consideration. For homeowners looking for an Irwindale GAF service with proven wind performance, this upgrade often pays for itself.
The reason has to do with where Irwindale sits. The city occupies a wind-funneled gap at the mouth of the Santa Fe Dam basin, and Santa Ana events that barely move a branch in Covina can peel ridge caps off an Irwindale roof. On a replacement we spec a tighter fastener pattern and higher-wind-rated architectural shingles rather than the standard minimum. The brand matters less than the installation spec. That’s the difference between a roof that holds and one that loses tabs in the first big blow.
Decking: The Quiet Variable
We have opened up dozens of Irwindale roofs and found the original skip-sheathing still in place under the old three-tab. Nails were going into gaps. This is not unusual for the era. The right fix is to repair or re-sheet the decking before any new underlayment goes down, and we price that work in writing before we start.
New Construction and Full Replacement
For new construction or a complete structural replacement, we work from the deck up: underlayment, edge metal, venting, and shingles all spec’d for the structure and the wind load. Roland Vega walks the roof with every homeowner before tear-off, so there are no surprises about what’s under the old layer.
Trusted Brands We Service in Irwindale
We’re authorized installers across seven major shingle and membrane brands, including GAF, CertainTeed, and Tamko. That matters in a city like Irwindale because the right product here depends on the specific failure mode. A wind-battered residential roof off Huntington Drive may need a CertainTeed architectural shingle rated for high wind and installed to a six-nail pattern. A flat warehouse roof on Arrow Highway may need a modified-bitumen system with a fully adhered membrane. Because we stock parts and have supplier relationships for all seven brands, lead times on Irwindale replacements stay short, and we don’t push a single brand because we don’t have to.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Irwindale Homes
- Skip-sheathing that won’t hold fasteners. Original 1950s-to-1970s spaced board decking was fine for the era’s lighter three-tab shingles, but modern architectural shingles need a solid nailing surface. We re-sheet or overlay the deck before underlayment, and we price it upfront.
- Santa Ana wind peel at ridge and flashing lines. The wind that channels through the dam basin gap doesn’t hit every city the same way. Irwindale roofs lose ridge caps, starter strip, and roof-to-wall flashing on gusts that leave Azusa and Covina untouched. The fix is a spec nailing pattern, not just a heavier shingle.
- Grit and dust abrading edge metal. Blowing dust from the Santa Fe Dam basin and nearby gravel pits sandblasts drip edge and fascia over the years. On a replacement we replace edge metal and don’t reuse what’s pitted, because the seal is already compromised.
- Clogged low-slope drains and scuppers. On Irwindale’s flat and low-slope roofs, the same windblown grit silts up drains during dry spells. When winter rain comes, water ponds. We clear and replace drain assemblies as part of every flat roof replacement.
Pricing for Roof Replacement in Irwindale, CA
A typical residential tear-off and re-shingle in Irwindale runs $9,500 to $18,000 for a 1,200 to 2,000 square foot home. The spread comes from four variables: decking condition, roof pitch, shingle grade, and wind-rating spec. Flat roof replacement on a commercial or industrial building in the 91722 zip code runs $7 to $12 per square foot for full tear-off and new membrane. Upgrading from a standard three-tab to a high-wind architectural shingle adds roughly ten to fifteen percent to the material line; in Irwindale’s wind corridor this is often the difference between a roof that holds and one that fails early. Every estimate is written as a line item, and any decking or flashing work we find after tear-off is priced and approved in writing before we touch it. Call (833) 589-7971 to schedule your free estimate.
We Also Serve Cities Near Irwindale
Beyond Irwindale, our crews replace roofs regularly in Covina, Azusa, Citrus, and West Covina. If your home sits near the city line or you own property across the San Gabriel Valley, Roof Replacement in Irwindale is one page in a larger service area we cover. We’ll meet you on the roof and talk straight about what’s up there.
Serving Irwindale, CA — Our Local Coverage Area
We’re based in the Irwindale 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 Irwindale
Irwindale’s wind exposure through the Santa Fe Dam basin gap means a responsible bid here should include a higher-wind-rated architectural shingle and a tighter nailing pattern, which adds ten to fifteen percent to the material line versus a baseline shingle. The other common driver is decking: mid-century skip-sheathing in Irwindale homes frequently needs repair or re-sheeting before new underlayment goes down, while a Duarte home of the same era may have plywood decking in place. A cheaper bid that doesn’t spec for wind or decking isn’t cheaper; it’s just not addressing the actual roof. Call (833) 589-7971 and we’ll walk through exactly what’s in our number.
Compare the line items that actually determine performance: shingle grade and wind rating, nailing pattern, decking allowance, underlayment type, and whether edge metal and flashing are replaced or reused. In Irwindale, a bid that reuses existing drip edge and doesn’t spec for Santa Ana wind load will be cheaper up front and cost more later. Ask both bidders to walk the roof and show you the decking. Ask what happens if the sheathing is shot. We write allowances into our contracts so you know the number before the first nail comes out.
Yes. The gap at the mouth of the Santa Fe Dam basin channels wind in a way that doesn’t happen in the foothill cities to the north. We routinely find ridge caps, starter strip, and roof-to-wall flashing peeled back after Santa Ana events on Irwindale roofs that would have held elsewhere. The fix is a higher-wind-rated architectural shingle installed to a six-nail pattern, not a heavier shingle alone. We spec for the city’s actual wind load, not the county minimum.
Composition shingles are rated down to a 2:12 pitch, and below that you’re in membrane territory. Many Irwindale homes sit near that line. If your roof is at or below 2:12, a flat roof replacement using a modified-bitumen or single-ply membrane is the right call. If you’re just above it, architectural shingles with proper underlayment can work. We’ll measure the pitch and give you the straight answer, not whichever answer sells the bigger job.
The two we see most are original skip-sheathing that won’t hold new fasteners, and flashing at roof-to-wall transitions that has been working loose for years under Santa Ana load. Both are repairable. The important part is that they’re found and priced before the new roof goes on, not discovered by the homeowner as a change order with no approval. On a 1962 single-story stucco home off Huntington Drive near the dam basin, we tore off three-tab shingles to find the original skip-sheathing and a ridge cap that had been peeling back on every Santa Ana gust. We re-decked the worst runs, ran ice and water shield through the valleys, and set new GAF architectural shingles to a six-nail pattern so the wind rating actually held. The homeowner got the decking repair priced and approved in writing before we laid a single new square. That’s how we work in Irwindale.
Written by Roland Vega, Owner at Hollywood Roofing Co, serving Irwindale and the San Gabriel Valley since day one.