Los Angeles & Orange County

The Right Flat Roof System, Installed to Code

We match torch-down, TPO, or PVC to your home, build in the slope, and seal every seam and flashing, the way a low-slope roof should be done.

Aerial view of a residential flat roof with a white cool-roof membrane and roof drain in Los Angeles

Residential Flat Roof Specialists

A Flat Roof Done Right Is a Dry Roof, For Decades

Flat and low-slope roofs top much of Los Angeles and Orange County, from mid-century moderns to new ADUs. A flat roof does not fail because it is flat. It fails when the seams, flashings, and drainage were never built right. Here is what we build into every one.

  • SRI 75Cool membrane

    Meets California's strictest reflectivity standard.

  • 1/4 in/ ftEngineered slope

    So water drains instead of ponding.

  • Class AFire-rated assembly

    Fire-rated assemblies available for wildfire zones.

  • 15–30+yrService life

    Depending on the system you choose.

  • Free estimateNext step

    A detailed written scope before any work begins.

Hybrid Renovations crew installing a flat roof membrane on a home in Los Angeles

What We Do

Full Flat Roof Work, Not Patch Jobs

We take on the flat roof projects that need to be done once and done right.

  1. Flat roof replacement

    Full tear-off to the deck, then a complete new system that ends a leak history for good.

  2. New flat roof installation

    New low-slope roofs for room additions, garage conversions, ADUs, and patio structures.

  3. Re-roofs over hot mop & gravel

    We tear off aging tar-and-gravel and built-up roofs and upgrade them to a modern membrane system.

  4. Major repairs

    Large-section membrane replacement, parapet and flashing rebuilds, slope and drainage correction, and dry rot repair.

  5. Minor patches and repairs

    Not our work.

    If a small patch is all you need, we will tell you honestly.

The Systems We Install

Four Proven Flat Roof Systems, Matched to Your Home and Budget

There is no single right flat roof. There is a right flat roof for your home, your plans, and your budget. Here is where each one lands.

Ordered left to right, best value to longest life.

Torch-applied modified bitumen flat roof with a granulated cap sheet

Modified bitumen · torch-applied

Torch-Down

Polymer-modified asphalt fused with heat into a thick, puncture-resistant roof with a granulated, cool-rated cap. The Southern California workhorse.

Lifespan
15 to 20 yr
Relative cost
Relative cost 1 of 4
Best for Proven value for most homes, additions, and garages.
Self-adhered modified bitumen membrane installed flame-free on a home

Modified bitumen · torch-free

Self-Adhered

The same multi-layer protection, installed with high-strength peel-and-stick sheets and no open flame.

Lifespan
15 to 20 yr
Relative cost
Relative cost 1 of 4
Best for Occupied homes and tight lots where flame-free installation is the smarter call.
Bright white TPO single-ply membrane with heat-welded seams on a low-slope roof

Single-ply · heat-welded

TPO

A bright white reflective membrane with hot-air welded seams, a weld as strong as the sheet itself. The strongest energy story here.

Lifespan
20 to 30 yr
Relative cost
Relative cost 2 of 4
Best for Energy savings, a modern look, and a long service life.
PVC single-ply membrane roof with welded seams tolerant of standing water

Single-ply · heat-welded

PVC

The top of the single-ply range. Welded seams and a tougher formulation give it the longest life and the best tolerance of standing water.

Lifespan
25 to 30+ yr
Relative cost
Relative cost 3 of 4
Best for The homeowner who wants the last flat roof they will buy.

Still have a tar-and-gravel or hot mop roof? Those systems served their era. When yours reaches the end, we replace it with one of the modern systems above rather than patching the past.

Why Ours Don't Leak

Flat roofs always leak. Not when they are built like this.

Almost every flat roof leak traces back to one of six details. We obsess over all six on every job, starting with the one that fails first.

Membrane flashing sealed up a parapet wall and around a vent pipe on a flat roof Number one leak point

Flashings at every wall, parapet, and pipe

Metal and membrane flashings turn corners, climb parapet walls, and seal every penetration, the places water probes first. This is where cheap flat roofs fail, so it is where we spend the most care.

  • A sound, dry deck

    Every system starts on inspected wood. Rot and soft sections are replaced before anything goes over them.

  • Slope you can't see, drainage you can

    Flat roofs are never truly flat. We build in a minimum quarter inch per foot of fall with tapered insulation so water always has somewhere to go.

  • One continuous membrane

    Fused with heat, welded with hot air, or bonded ply over ply, the field becomes a single watertight sheet.

  • Seams that are the strong point

    Seams are where cheap flat roofs die. Ours are fused or welded, not just glued and hoped for.

  • Edges, scuppers, and overflows

    Finished edge metal, clear scuppers, and code-required overflow drainage mean even a blocked drain in a downpour has a backup plan.

The 48-Hour Rule

A Flat Roof Should Be Dry Within 48 Hours

After a storm, water should drain off a flat roof within 48 hours. Water that lingers has a name: ponding. Here is a roof that holds it beside a roof that sheds it.

Cutaway of a flat roof with no slope holding standing water in a low spot Past 48 hours A roof that ponds No slope. Water pools in the low spot, gets heavier, deepens, and climbs toward the flashing.
Cutaway of a flat roof with built-in slope shedding water to a scupper Dry in 48 hrs A roof that drains Built-in slope. Every storm runs to a drain or scupper before it can sit and do harm.

Why ponding destroys a roof

  • It voids your warranty — Most membrane warranties exclude standing-water damage.
  • It ages the membrane fast — Standing water magnifies UV and softens seams years early.
  • It gets heavier and deeper — Weight deflects the deck; the low spot then holds even more.
  • It finds a way in — Rise above the flashing and water is in the ceiling below.

How we build it to drain

  • We build in the slope — Tapered insulation creates a real quarter inch per foot of fall.
  • We steer the water — Crickets and saddles divert around chimneys and penetrations.
  • We plan for the worst storm — Code-required overflow drainage backs up the primary drains.
  • We check it before we leave — We confirm every low point drains before we call it done.

Most flat roof problems are really drainage problems. Build the drainage right, and the leaks never start.

Why Flat

Six Reasons a Flat Roof Earns Its Keep

A flat roof is not a compromise. Built right, it turns the top of your home into usable space, the ideal solar platform, and a cool, low-profile roofline that fits modern Southern California living.

The headline benefit

A whole new floor you never lose to the yard

A properly engineered flat roof can carry a deck, terrace, or lounge, usable square footage with structural capacity designed in from the start.

Rooftop deck on a modern flat-roof home
  • The best solar platform

    Tilt racking angles panels to the ideal pitch no matter which way your home faces.

  • Meets Title 24 (SRI 75)

    A white, reflective cool-roof membrane meets California's strictest low-slope standard.

  • A place for the hardware

    HVAC units, vents, and lines sit up top, out of your yard and out of sight, with easy access.

  • A clean, modern low profile

    Flat rooflines fit modern Southern California architecture and keep height down, which can matter for ADUs.

  • Built for the footprint

    Additions, garages, and ADUs skip the complex hip-and-valley framing a pitched roof needs.

Sunlight reflecting off a white flat roof under a bright sky

Cool Roof & Title 24

The Highest Cool-Roof Bar in California

Your flat roof has to reflect and release more heat than any pitched roof, in all 16 climate zones. We build to it and file the proof.

0.63 Solar reflectance How much sunlight the roof bounces back instead of soaking up.
0.75 Thermal emittance How fast it releases heat instead of pushing it into your home.
Flat / low-slope SRI 75 All 16 zones
Pitched SRI 16 Some zones

A flat roof reflects far more heat, statewide. A white cool-roof membrane clears it easily.

CRRC-rated membrane

Independently rated and listed in the Cool Roof Rating Council directory, the proof your city wants.

Matched to your zone

Los Angeles and Orange County span several zones. We install to the standard for your area.

We file the CF1R

The Title 24 certificate of compliance goes in with your permit. You do not chase a form.

We handle exemptions

Area under solar panels and added insulation options, built into the plan the right way.

Built for Solar

A Flat Roof Lets You Aim Solar Anywhere the Sun Is

On a pitched roof, panels are stuck with whatever direction the slope faces. On a flat roof, the rack sets the angle, so panels tilt to the ideal pitch and face true south no matter how your home sits. That freedom, plus mounting that usually never drills the roof, makes a flat roof one of the best solar platforms in Southern California.

Solar panels tilt-racked on a flat roof, aimed true south in Los Angeles Solar on a flat roof with tilt racking

Flat roof

Tilt racking sets the angle and aims panels true south. Most arrays ballast onto the roof with no holes drilled, so the membrane and its warranty stay intact.

Pitched roof

Panels follow the existing slope and direction. Every mount is drilled and sealed through the roofing, the most common source of roof leaks.

10-15% more

The output you would leave on the table. Panels aimed at the ideal tilt and true south often produce 10 to 15 percent more than panels locked to a slope that faces the wrong way. On a flat roof, the rack decides the angle, not your rooflines.

A light, reflective cool-roof membrane can even give bifacial panels a small output bump.

Aim, don't settle

Tilt racking sets the perfect pitch and points panels true south, whatever way your house faces.

Weighted, not drilled

Most flat-roof arrays ballast down with no penetrations, so your roof and its warranty stay intact.

Low, hidden, easy to reach

Panels lie low and out of sight from the street, the whole roof stays usable, and walk-on access makes cleaning simple.

Going solar soon? Start with a fresh membrane so the roof outlasts the panels and you never pay to pull the array for a re-roof. If your structure or wind exposure calls for attached mounts, we flash every penetration to keep it watertight.

Let's Clear This Up

What You've Heard About Flat Roofs,and What's Actually True

Flat roofs have a reputation built on old materials and bad installs. Modern low-slope systems are a different animal. Here are the six myths we hear most, and what is actually true. 

The truth

Flat roofs do not leak because they are flat. They leak when they are installed poorly. On a low-slope roof, water is managed by the membrane, the seams, the flashings, and the drainage, not by a steep pitch. Done right, with heat-welded or fully fused seams, flashing at every wall and penetration, and a built-in slope of about a quarter inch per foot, a modern flat roof stays dry for decades. Almost every leak we are called to fix traces back to a bad seam, a missed flashing detail, or standing water, all of which come down to workmanship. 

The truth

It should not be. Code calls for a minimum slope of about a quarter inch per foot, and we build that slope in with tapered insulation and crickets so water moves toward the drains and scuppers instead of sitting. A roof that actually holds water is a problem to fix, not a design. The goal is simple: no standing water 48 hours after it rains. 

The truth

Lifespan depends on the system and the install, not the shape. Torch-down modified bitumen commonly lasts 15 to 20 years, TPO runs about 20 to 30, and PVC can reach 25 to 30 or more, especially where ponding is a risk. The old hot-mopped tar-and-gravel roofs earned flat roofing its short-lived reputation. The systems we install are not those roofs. 

The truth

Flat and pitched roofs fail in different places for different reasons, and they are built with different materials and methods. A low-slope membrane lives or dies on seam welding, flashing detail, and drainage design, which is specialized work. A crew that mostly installs shingles is not automatically set up to weld a membrane or build proper slope. It is worth asking who is actually doing the work.

The truth

The opposite is true when it is built to code. California's Title 24 energy standard holds low-slope roofs to the strictest cool-roof requirement in the state, so a compliant flat roof uses a reflective membrane that pushes summer heat back off your home. A white cool-roof surface can run far cooler than a dark one in peak sun, which eases the load on your air conditioner.

The truth

Flat and low-slope roofs are common on homes across Los Angeles and Orange County, from mid-century houses to modern builds, additions, garages, and ADUs. A low profile keeps the height down where local limits matter, turns the roof into usable space or a solar platform, and fits the clean lines of modern Southern California architecture. This is residential work, and it is a large part of what we do. 

Have a concern that is not on this list? Ask us at your estimate. You will get a straight answer, including the cases where a flat roof is not the right choice.

Get a Free Flat Roof Estimate
Clay and concrete tile roofs on hillside homes in a Santa Clarita neighborhood below the mountains at sunset

Wildfire-Ready Roofing

A Class A Flat Roof, Built for Wildfire Country

In a fire zone, every flat section of your home has to earn a Class A rating on its own, the same as the main roof. We install fire-rated membrane assemblies that carry the highest fire classification there is. Class A is not one product, it is the whole system, and the details at the seams, edges, and penetrations are what keep embers out.

What we build in
  • Class A fire-rated membrane assembly
  • Fire-rated base sheet and cap sheet
  • Self-adhered or cold-applied install, no open-flame torch
  • Sealed flashing at every wall, edge, and penetration
  • Ember-resistant vents and edge details

In a Fire Hazard Severity Zone? Many insurers now ask for Class A roof documentation before they will cover a home, and California expanded its fire hazard maps in 2024 and 2025. We build every flat section to the state's wildfire code and hand you the paperwork. 

Schedule a Free Consultation (562) 903-3955 Mon to Fri, 7am to 7pm

OUR FLAT ROOFING PROCESS

How We Install Your Flat Roof

A flat roof lasts because of the sequence behind it, not just the membrane on top. Here is exactly how we tear off and install or re-roof a low-slope roof, from protecting your home on day one to the final walkthrough. Every step is built around a dry deck, built-in slope, and welded, sealed details that keep water moving to the drains instead of sitting on the roof. 

  1. We protect your property

    We cover your landscaping, walkways, and AC units, set up debris control, and run a magnetic sweep for stray fasteners at the end of each day. Your driveway and yard stay usable while we work.

  2. We tear off the old roof

    We strip the roof down to the deck and haul the old membrane, flashings, and any failed layers away. Roofing over damaged or wet material only traps moisture, so going all the way down lets us see the deck's real condition instead of building a new roof over hidden problems.

  3. We check and prep the deck

    We inspect every panel and replace any sheathing that is rotted, soft, or water-damaged, so your flat roof starts on a solid, dry base. A low-slope roof is only as good as what it sits on, so we confirm the structure is sound and tell you honestly if anything needs attention before we go further.

  4. We build in the slope and drainage

    This is the step that keeps a flat roof from becoming a pond. We build positive slope with tapered insulation and crickets so water is directed to the drains, scuppers, and edges instead of standing on the surface. The target is simple and code-backed: no standing water 48 hours after it rains, something a true flat roof cannot fix on its own.

  5. We install the membrane and weld the seams

    Next comes the waterproofing. We roll out your chosen membrane, torch-down, TPO, or PVC, and heat-weld or fully fuse every seam so the surface performs as one continuous sheet. A welded seam is as strong as the membrane itself, which is why a properly installed flat roof does not leak down the field.

  6. We flash the details, then clean up and walk it with you

    We seal the flashing at every wall, edge, and penetration, the small transitions where most flat roofs actually leak, and set the edge metal, scuppers, and overflow. Then we run a final magnetic sweep, haul away every scrap, and walk the finished roof with you before we call it done, along with your warranty paperwork.

Permits & Inspections

We Handle the Permits, the Code, and the Inspections

A flat roof replacement in Los Angeles or Orange County has to be permitted, built to California code, and inspected. We take all of that off your plate. You do not chase the city, fill out forms, or wait around for inspectors. We pull the permit, build to code, coordinate every inspection, and hand you a clean, signed-off record when the job is done. 

  • We pull the permit

    We file for and pull the roofing permit with your local building department, whether your home is in the City of Los Angeles, unincorporated LA County, or an Orange County city, so the work is on record and done by the book.

  • We build to California code

    A low-slope roof has its own rules. We build in positive drainage with the required slope, add overflow scuppers or secondary drains where a parapet could trap water, and meet the strict Title 24 cool-roof spec that applies to flat roofs. Where your home is in a wildfire zone, we install a Class A fire-rated assembly. The right specs go into the permit from the start, so nothing gets flagged later.

  • We coordinate the inspections

    Flat roofs get a tear-off inspection once the old roof is off, so the inspector can check the deck for dry rot and damage before anything new goes down, plus a final inspection at the end. We schedule and meet both, and if the inspector has questions, we handle them directly, so you never have to.

  • We hand over the signed-off record

    When the final inspection passes, you get the documentation showing the roof was permitted, inspected, and approved, including your signed Title 24 compliance paperwork. That record protects your home's value and can matter to your insurer and to future buyers.

Credentials & Certifications

Built on Trust, Backed by Proof

Every roof we install is covered, certified, and managed start to finish.

  • Licensed, Bonded & Insured
  • Manufacturer-Certified Installers
  • Workmanship Warranties
  • 1,000+ Completed Projects
  • BBB Accredited
  • Clear Written Estimate & Scope
  • One Dedicated Project Manager
  • 4.9-Star Average Rating
Crew pouring concrete and stacking roof tile at a two-story home under construction by Hybrid Renovations general contractor

OUR PROCESS

Four Steps. Zero Surprises.

Clear, honest communication from your first call to the final walkthrough.

  1. Free estimate

    Next-day visit

    It starts with a free visit, often the very next day. We look at the work, listen to your goals, and hand you a clear written estimate at no cost.

  2. Locked-in pricing

    Good for a year

    Your estimate is detailed, honest, and good for a full year. Take your time to plan and budget, and the price stays the same when you're ready.

  3. Project manager

    One point of contact

    One dedicated manager runs the entire job. They handle the permits, materials, and crew, and keep you updated at every step so nothing catches you off guard.

  4. Final walkthrough

    Workmanship warranty

    We walk the finished project with you and aren't done until you're happy. Anything that needs a fix, we fix, all backed by a written workmanship warranty.

Reviews

4.9 stars across 100+ five-star reviews
from LA & Orange County homeowners.

Real homeowners. Real renovations. Verified across Google.

FINANCING

Renovate Now, Pay Over Time

Big projects shouldn't have to wait on cash flow. We work with trusted financing partners so you can move forward on your roof, remodel, or ADU and spread the cost into monthly payments that fit your budget. Financing is available with approved credit.

  1. Tell us you're interested

    During your free estimate

    Let your project manager know financing is on the table. We'll build it into your written estimate so you see the full picture upfront.

  2. Apply in minutes

    Quick application

    We connect you with our financing partners and walk you through a short application. Many homeowners get same-day approval, without the long wait of a bank.

  3. Choose what fits

    You pick the plan

    Review the options you're approved for and pick the monthly payment that fits your budget. No pressure to take more than you need.

  4. Start your project

    Get to work

    Once you're approved, we lock in your start date and get going. You enjoy the result now and pay over time.

Financing available with approved credit. Terms vary by lender and project.

FREQUENTLY ASKED QUESTIONS

Questions Homeowners Ask Us

Straight answers about how we work, what projects cost, and what to expect when you hire a licensed contractor. No pressure, no runaround.

Do flat roofs really leak more than pitched roofs?

No, not when they are installed correctly. Flat roofs do not leak because they are flat. They leak at seams, flashings, and penetrations when the workmanship is poor, or when standing water is allowed to sit. A modern low-slope roof with heat-welded or fully fused seams, flashing sealed at every wall and penetration, and a built-in slope that moves water to the drains will stay dry for decades. Almost every leak we are called to repair traces back to a bad seam, a missed flashing detail, or a drainage problem, all of which come down to how the roof was built. 

What are flat roofs actually made of, and which system is best?

The three systems we install are torch-down modified bitumen, TPO, and PVC. Torch-down is a proven, budget-friendly asphalt-based membrane and the most common choice on Southern California homes, commonly lasting 15 to 20 years. TPO is a white, heat-welded single-ply membrane that reflects heat and typically lasts 20 to 30 years. PVC is the top tier, with the best resistance to standing water and a lifespan that can reach 25 to 30 years or more. There is no single best system for every home. We recommend one based on your roof, your budget, and how the surface will be used, and we explain the tradeoffs honestly before you decide. 

How long does a flat roof last?

It depends on the system and the quality of the install, not the shape of the roof. Torch-down commonly lasts 15 to 20 years, TPO runs about 20 to 30, and PVC can reach 25 to 30 years or more. The old hot-mopped tar-and-gravel roofs are what gave flat roofing its short-lived reputation, and those are not the systems we install. Proper slope, welded seams, and good flashing are what carry a modern flat roof to the top of its range.

Why does standing water on a flat roof matter?

Standing water, called ponding, is the number one enemy of a flat roof. Water that sits for more than 48 hours after it rains accelerates aging, magnifies the sun's UV damage, softens seams, and adds real weight, since water weighs about 8.3 pounds per gallon. It also voids most membrane warranties. A flat roof is never meant to be dead level. Code calls for a minimum slope of about a quarter inch per foot, and we build that slope in with tapered insulation and crickets so water is directed to the drains and scuppers instead of pooling. Our target is simple: no standing water 48 hours after a storm. 

Can you put a new flat roof over my old one?

On most of our projects we recommend a full tear-off down to the deck rather than roofing over the old surface. Covering a worn or wet roof traps moisture, hides rot, and shortens the life of the new membrane. Tearing off lets us inspect the deck, replace any damaged sheathing, and build the new roof on a sound, dry base. A tear-off is also often required by the building department, and it is the only way to correct slope and drainage properly. 

Does a flat roof need a permit, and do you handle it?

Yes, a flat roof replacement requires a permit in virtually every Los Angeles and Orange County jurisdiction, and we handle the entire process. We pull the permit, build to California code, and coordinate the inspections, including the tear-off inspection where the city checks the exposed deck before the new membrane goes on, plus the final inspection at the end. When the job passes, we hand you the signed-off record and your Title 24 compliance paperwork. You do not chase the city or fill out forms. 

Will a flat roof make my house hotter?

The opposite is true when it is built to current code. California's Title 24 energy standard holds flat and low-slope roofs to the strictest cool-roof requirement in the state, and it applies in every climate zone. A compliant flat roof uses a reflective membrane that pushes summer heat back off your home instead of soaking it up. A white cool-roof surface can run far cooler than a dark one in peak sun, which eases the load on your air conditioner. We install cool-roof-rated membranes and file the compliance paperwork with your permit. 

Are flat roofs good for solar panels?

Flat roofs are one of the best platforms for solar. Because the roof has no fixed slope, the mounting rack sets the angle, so panels can be tilted to the ideal pitch and aimed true south no matter which way your home faces. That often produces more energy than panels locked to a slope pointing the wrong direction. Most flat-roof arrays also ballast down with weighted mounts, so the membrane is not drilled and its warranty stays intact, though homes with certain structural or wind conditions may need attached mounts, which we flash and seal watertight. If solar is in your plans, the best move is to start with a fresh membrane so the roof outlasts the panels and you never pay to remove the array for a re-roof later. 

SERVICE AREAS

Two Counties. One Local Team.

We serve homeowners throughout Los Angeles County and Orange County. The cities below are a few of the areas we cover, not a complete list.

Hybrid Renovations is a residential general contractor serving homeowners across Los Angeles County and Orange County. In Los Angeles County we work in cities including Whittier, Downey, La Mirada, Norwalk, Cerritos, Pico Rivera, Bellflower, El Monte, Hacienda Heights, Glendora, Claremont, West Covina, Long Beach, and Pasadena. In Orange County we serve Anaheim, Santa Ana, Garden Grove, Fullerton, La Habra, Brea, Buena Park, Yorba Linda, Orange, Irvine, Tustin, and Huntington Beach, among others. For larger projects, we also work in nearby Inland Empire areas such as Chino, Chino Hills, Ontario, and Corona. The cities listed are examples, not a complete list.

Hybrid Renovations inspector and a homeowner crouch to examine exterior siding during a free exterior painting inspection

Free estimate

Get your free in-home estimate.

A project manager visits your home, measures, and helps you plan the work around your budget. Free, no-obligation estimates for construction, remodeling, and renovations across Los Angeles and Orange County.

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  • Free, No-Obligation Estimate
  • Trusted by Local Homeowners
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