Roof Replacement Los Angeles

When a commercial roof has reached its life expectancy and repairs or restoration are no longer an option, it is time to tear-off and replace (“re-roof”) the existing roof.

Central Roofing Company specializes in flat and low slope commercial roof replacement for all types of nonresidential buildings located in our service areas of Los Angeles, Orange, Ventura, San Bernardino and Riverside Counties.

Additionally, we replace the roofs of pitched buildings located in the same counties with composition or asphalt shingle roofing products.

If >50% or >2,000 square feet of a low-sloped nonresidential roof (whichever is less) is being replaced (“re-roofed”), Title-24 cool roof regulations apply. Contact us to learn ways to comply if your existing roof is BUR (including smooth, gravel or cap), Modified Bitumen, Single Ply, or Metal (coated or uncoated).


Overview of Steps to Replace a Flat Roof

All roofs are unique in design and framing; moreover, some roofs simply drain better than others. Central Roofing Company will evaluate your roof to determine what roofing system will work best for your particular situation.

Below we have illustrated the basic steps when replacing a commercial flat roof, in this case, with a new torch applied Modified Bitumen Roof System.

Step 1

tear off existing roofing layers

Tear off existing layers of roofing to the original deck and haul away.

Step 2

replace damaged wood

Replace damaged or dry-rotted plywood and rafters.

Step 3

photo missing

Build up low ponding areas with fiberboard and taper edges.

Step 4

fasten base sheet to deck and walls

Mechanically-fasten Base Sheet to deck and parapet walls.

Step 5

install pipe and vent flashing

Install new pipe and vent flashing and prime all roof to metal contact.

Step 6

install modified bitumen

Install APP Modified Bitumen using torch application method.


9 Warning Signs You Need a Roof Replacement

It goes without saying that if your building has roof leaks you need to have it inspected and corrected right away. Is a leak reason enough to replace the entire roof? Not necessarily, an isolated roof repair may be enough to address the specific issue.

However, if the roof has multiple issues or new issues creeping up season after season, this may be a true indication that the roof is in need of replacement.

Here are 9 warning signs to look for when evaluating a roof that may need to be replaced:

1.Age Matters: Roofing systems are typically designed to last upward of 20 years depending on materials used, maintenance and drainage. Does your roof pass the eye test? Does it look weathered? If your roof is in that age range, chances are you may be in need of a replacement.

2.Leaks: Any intrusion of water can lead to bigger issues then just inconvenience. Leaks not only need to be corrected immediately to avoid property damage, they need to be corrected to avoid damaging structural integrity of the wood substrate. Failure to do can lead to bigger costs. Having leaks may be a signal that a roof will need to be replaced.

3.Staining: In a commercial building, you can typically see the roof framing. Ever notice water staining on your ceiling or interior walls even if you don’t see a leak?

4.Ponding: By definition, it is the excessive accumulation of water at low-lying areas on a roof. Characteristically, ponding can be seen at drains or other areas where the roof does not drain efficiently. Eventually, water intrusion will occur at ponding areas, possibly compromising the wood substrate to compound the issue as the plywood and supporting rafters become effected. Damaged rafters can also create ponding areas. In any case, this becomes a structural and safety issue that needs to be corrected immediately to minimize cost of correction.

5.Delamination: The separation of the laminated layers of a component or system. Are roofing seams popping open on the field creating ‘fish mouths’? Is your parapet wall membrane loose, displaced or buckling at the seams?

6.Blisters: If you see enclosed pockets of air or bubbles on your existing roof what you are seeing is trapped moisture inside or under the roofing material.

7.Fractures: Cracks or splits in your roof membrane are often a sign of a dehydrated roof membrane. The dehydrated roof membranes’ inability to flex with stress or roof movement, such as foundation shifting (which may be normal) can produce fissures in the membrane.

8.Damaged Flashings: Caused by the drying or cracking of roof sealant around pipes, vents and other penetrations can create openings small and large allowing water intrusion.

9.Granule Loss: Do you see roof granules piling up on your roof? Do you see bare spots in the roof membrane? Natural Weathering or the constant exposure to heat, water and condensation will eventually effect the physical properties of the roofing materials. Simply put – no roof lasts forever!

During the complimentary estimate, qualified estimators will look for these warning signs and then determine if your existing roof needs to be completely replaced.


Manufacturer Affiliations

Central Roofing Company is proudly affiliated with these manufacturers of commercial roof products designed to surpass industry standards. We determine what product to use based on your particular needs. Each product comes with a manufacturer warranty.

Cool White Elastomeric Roof Coatings:

  • APOC
  • Tropical

Torch Modified or Modified Bitumen:

  • Polyglass

Asphalt Shingle or Composition Shingle:

  • Malarkey
  • GAF
  • Tamko
  • Certainteed
  • Owens Corning


Safety First While Re-Roofing

Creating a safe work environment is a top priority at Central Roofing Company. Our skilled technicians attend monthly safety meetings conducted by Safety Compliance Professionals to insure that they are complying with CAL-OSHA standards.

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Request a Free Estimate to Replace your Roof

Not sure if your commercial roof needs to be replaced (“re-roofed”)? Are you being quoted different roof estimates and need one more?

One of our re-roofing estimators will meet you to review your options and follow up with a free, no-obligation, written estimate.

Get Started

  • Central Roofing client Ingram Micro
    Ingram Micro, 204,000 sq ft, Santa Ana