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CA Contractor License # 886275, C-39, B, C-33

Licensed Roofing, Painting and General Building Contractor



There are many roofing systems for commercial flat roofs - Hot Mop Roofing, Modified Bitumen Roofing, and Single Ply are among the main systems we use in Southern California.

commercial flat roofs - All Climate Roofing


Hot Mop roofing, also known as Built-Up Roofing (BUR), has been a cornerstone in the roofing industry for decades. This traditional method involves layering hot asphalt and roofing felt to create a robust and seamless roofing system.

The Advantages of Hot Mop roofing systems include:

  • Proven durability: Hot Mop roofing is renowned for its enduring strength, with a history of reliable performance. Multiple layers of bitumen and roofing felt create a sturdy and resilient roofing system that can withstand punctures, tears and various weather conditions.
  • Waterproofing excellence: the application of hot asphalt ensures seamless and watertight surface, offering superior waterproofing
  • Adaptability: suitable for roofs with complect shapes, making it a versatile choice for various architectural designs

Modified Bitumen roofing is an evolution of traditional BUR and incorporates polymer-modified asphalt sheets or rolls. These sheets come in two main types: SBS (Styrene-Butadiene-Styrene) and APP (Atactic Polypropylene). SBS offers increased flexibility, while APP provides greater resistance to UV exposure.

Modified bitumen roofing is installed using a variety of methods, including heat welding, cold adhesives, or self-adhesive sheets. This provides flexibility in installation methods.

The advantages of Modified Bitumen roofing include:

  • Durability: Modified bitumen roofing is known for its durability and ability to withstand harsh weather conditions. It provides a long-lasting roofing solution that can endure temperature extremes, UV exposure, and other environmental factors.
  • Flexibility: The addition of polymers, such as SBS (Styrene-Butadiene-Styrene) or APP (Atactic Polypropylene), enhances the flexibility of the bitumen. This flexibility allows the roofing material to adapt to temperature changes without cracking, making it suitable for varying climates.
  • Waterproofing: Modified bitumen roofing provides effective waterproofing for low-slope roofs. The seams are sealed during installation, creating a watertight barrier that helps prevent water infiltration and protects the underlying structure.

Single Ply roofing includes materials like TPO (Thermoplastic Olefin), PVC (Polyvinyl Chloride), and EPDM (Ethylene Propylene Diene Monomer).

Advantages of Single Ply roofing system include

  • Lightweight and Easy Installation: Single Ply systems, including TPO, PVC, and EPDM, are generally lightweight, contributing to ease of installation.
  • Reflectivity: TPO and PVC can be highly reflective, enhancing energy efficiency and reducing cooling costs.
  • Chemical Resistance: Single Ply membranes, such as TPO and PVC, exhibit resistance to chemicals and pollutants.

Consult with Our Roofing Experts on Your Flat Roof Systems

When selecting commercial flat roofs for Santa Barbara County, Ventura County, and Los Angeles County in Southern California, factors such as reflectivity, durability, resistance to UV radiation, and energy efficiency should be considered.

Additionally, local building codes and regulations may influence the choice of roofing materials. It's advisable to consult with a roofing professional to determine the most suitable flat roof system based on the specific requirements of your building and the local climate conditions.


  • Santa Barbara County
  • Ventura County
  • Los Angeles County


All Climate Roofing is proud to extend our commercial roofing services to clients located in the following areas:

  • Santa Barbara County
  • Ventura County
  • Los Angeles County

We have been a reliable commercial roofing company for more than a decade. In that time, we've built a name for ourselves as a one-stop shop for your roofing needs such as flat roof repair or commercial roof maintenance. As a family-owned and operated company, there's no better resource for your commercial flat roofs.

Be sure to contact us if you would like to schedule an appointment or if you have any questions. You can reach our office at (805) 390-1792. You can also request a free estimate by filling out the form below.

Before you know it, we'll have you connected with the innovative roofing solutions you've been looking for.